# Vajba - Full Catalog

> 201 free browser tools that run entirely in your browser. Files never leave your device, there are no accounts, no uploads, and no tracking.

This is the complete machine-readable catalog of every tool on Vajba, grouped by category. Each tool is a standalone single-page web app that processes input locally in JavaScript. The site is static, hosted in the EU (Denmark, on one.com), uses no cookies, ships no analytics, and has no user accounts.

For a shorter overview with hero tools per category, see /llms.txt.

## Image tools

All 41 tools at https://vajba.com/image-tools/. Files never leave your browser.

- [Photo Editor](https://vajba.com/image-editor/): photo editor that opens and develops RAW files, with layers, curves, HSL, filters, crop, retouch, and multi-format export.
- [Compress Image](https://vajba.com/compress-image/): reduce JPG, PNG, and WebP file size with adjustable quality and batch compression.
- [Image Resizer](https://vajba.com/image-resizer/): resize images to exact pixel dimensions and change format while preserving quality.
- [Screenshot Mockup Generator](https://vajba.com/screenshot-mockup/): wrap screenshots in macOS, Browser, or iPhone frames with gradient backgrounds for app and web previews.
- [Crop Image](https://vajba.com/crop-image/): crop images with presets for social media, common aspect ratios, and custom pixel dimensions.
- [Split Scanned Photos](https://vajba.com/split-scanned-photos/): split a scan with multiple photos on it into separate images; each photo is found, cropped to its paper edges and straightened, reviewed one at a time, and exported as full-resolution JPEGs in a ZIP. Desktop browsers only.
- [Rotate Image](https://vajba.com/rotate-image/): rotate photos 90, 180, or 270 degrees; supports JPG, PNG, WebP, GIF, HEIC.
- [Is This Photo Edited?](https://vajba.com/image-forensics/): check a photo for AI generation, cloned regions, edit history, hidden metadata and compression artifacts. Compare two versions side by side.
- [Flip Image](https://vajba.com/flip-image/): flip and mirror images horizontally or vertically across common formats.
- [Image Converter](https://vajba.com/image-converter/): hero converter that turns HEIC, JPG, PNG, WebP, AVIF, GIF, BMP and SVG into JPG, PNG, WebP, AVIF or GIF, hundreds at a time, with per-image progress, EXIF kept or removed, and correct Display P3 colours from iPhones.
- [Meme Generator](https://vajba.com/meme-generator/): add custom top and bottom text to any image, with no watermarks.
- [QR Code Reader](https://vajba.com/qr-code-reader/): scan with your camera or upload a photo, screenshot or PDF to decode QR codes and barcodes (links, Wi-Fi, contacts, events, payments, with safety notes on links).
- [YouTube Thumbnail Downloader](https://vajba.com/youtube-thumbnail-downloader/): paste a YouTube link to preview and save the thumbnail in multiple resolutions.
- [Photo Collage Maker](https://vajba.com/photo-collage-maker/): combine photos into custom grid layouts and export high-resolution PNG or JPG with no watermark.
- [Color Picker](https://vajba.com/color-picker/): upload an image or paste a URL to extract HEX codes, RGB values, and palettes.
- [Color Converter](https://vajba.com/color-converter/): convert any color code between HEX, RGB, HSL, OKLCH, LAB, Display P3, CMYK and CSS names. Paste any format in any box and get contrast, opacity and code for apps.
- [Color Palette from Image](https://vajba.com/color-palette-from-image/): extract palettes and exact HEX codes from any photo; export to CSS or Tailwind.
- [Color Contrast Checker](https://vajba.com/color-contrast-checker/): check text and background color contrast for WCAG AA and AAA accessibility compliance.
- [Color Blindness Simulator](https://vajba.com/color-blindness-simulator/): preview how images and UI look with 7 types of color vision deficiency, side by side.
- [Video Editor](https://vajba.com/video-editor/): trim and combine clips on a timeline, add transitions, text, and music, then export the finished video.
- [Compress Video](https://vajba.com/compress-video/): shrink MP4 and MOV video to an exact target size, with presets for Discord's 10 MB limit and 25 MB email attachments.
- [Video to GIF Converter](https://vajba.com/video-to-gif-converter/): convert MP4, MOV, and WebM clips to animated GIFs with trim, frame rate, and size controls.
- [MP4 to WEBM Converter](https://vajba.com/mp4-to-webm/): convert MP4 videos to web-friendly WebM with resolution and quality controls.
- [Green Screen Remover](https://vajba.com/green-screen-remover/): chroma key with spill suppression and transparent PNG export; works on any background color.
- [Add Watermark](https://vajba.com/add-watermark/): add text or logo watermarks to images and PDFs with size, position, opacity, and rotation controls.
- [Sliced Photo Effect](https://vajba.com/sliced-photo-effect/): blend a photo with a shifted copy of itself, or a second photo, through thin alternating stripes for a dreamy double exposure portrait.
- [EXIF Viewer](https://vajba.com/exif/): view camera settings, GPS location, capture date, and other metadata embedded in your photos.
- [Remove EXIF](https://vajba.com/remove-exif/): strip GPS coordinates, camera details, and other metadata from photos before sharing online.
- [Focal Length](https://vajba.com/focal-length/): calculate equivalent focal lengths across sensor sizes; compare crop factor for full frame, APS-C, MFT.
- [Aspect Ratio](https://vajba.com/aspect-ratio/): find the closest standard aspect ratio for any image or dimension set; references common video and photo ratios.
- [HEIC to JPG Converter](https://vajba.com/heic-to-jpg-converter/): convert iPhone and iPad HEIC photos to JPG with resize, quality, and background color controls.
- [HEIC to PNG Converter](https://vajba.com/heic-to-png-converter/): convert iPhone and iPad HEIC photos to universally compatible PNG with no quality loss.
- [RAW to JPG Converter](https://vajba.com/raw-to-jpg-converter/): extract JPG previews from RAW files including CR2, NEF, ARW, DNG, ORF, RAF.
- [PNG to JPG Converter](https://vajba.com/png-to-jpg-converter/): convert PNG to JPG with resize, quality, and background color controls.
- [JPG to PNG Converter](https://vajba.com/jpg-to-png-converter/): convert JPG photos to lossless PNG, one or hundreds at once.
- [PNG to WebP Converter](https://vajba.com/png-to-webp-converter/): convert PNG to WebP to cut file size by up to 80% with visual quality preserved.
- [JPG to WebP Converter](https://vajba.com/jpg-to-webp-converter/): convert JPG to WebP for dramatically smaller file sizes with visual quality preserved.
- [WebP to JPG Converter](https://vajba.com/webp-to-jpg-converter/): convert WebP to JPG with resize, quality, and background color controls.
- [WebP to PNG Converter](https://vajba.com/webp-to-png-converter/): convert WebP to PNG for universal compatibility with no quality loss.
- [AVIF to JPG Converter](https://vajba.com/avif-to-jpg-converter/): convert AVIF to JPG with resize, quality, and background color controls.
- [SVG to PNG Converter](https://vajba.com/svg-to-png/): convert SVG files or raw SVG code to high-quality PNG at any resolution.

## PDF tools

All 16 tools at https://vajba.com/pdf-tools/. Files never leave your browser.

- [Compress PDF](https://vajba.com/compress-pdf/): reduce image-heavy PDF size; choose quality level and preview savings before downloading.
- [PDF to Word Converter](https://vajba.com/pdf-to-word-converter/): convert PDF to editable .docx in the browser, with no upload.
- [PDF to JPG Converter](https://vajba.com/pdf-to-jpg/): convert each PDF page to a high-quality JPG; choose resolution; download individually or as ZIP.
- [Merge PDF](https://vajba.com/merge-pdf/): combine multiple PDFs into one document with drag-to-reorder and page preview.
- [Split PDF](https://vajba.com/split-pdf/): extract pages, split by range, or separate a PDF into individual files; preview before splitting.
- [PDF to PNG Converter](https://vajba.com/pdf-to-png/): convert PDF pages to high-quality PNG with transparency support; batch download as ZIP.
- [Rotate PDF](https://vajba.com/rotate-pdf/): rotate individual pages or the entire PDF; preview before downloading.
- [JPG to PDF Converter](https://vajba.com/jpg-to-pdf-converter/): combine one or more JPG images into a single PDF with page size, orientation, and margins.
- [Add Signature](https://vajba.com/add-signature/): add a signature to any PDF, JPG, or PNG by drawing, typing, or uploading a photo.
- [Unlock PDF](https://vajba.com/unlock-pdf/): remove restrictions from password-protected PDFs and unlock printing, copying, and editing (owner password only).
- [Protect PDF](https://vajba.com/protect-pdf/): add password protection and encryption to PDFs; restrict printing, copying, and editing.
- [Redact PDF](https://vajba.com/redact-pdf/): black out and permanently remove sensitive text; redactions are flattened so hidden data cannot be recovered.
- [Reorder PDF Pages](https://vajba.com/reorder-pdf-pages/): drag and drop to rearrange, reorder, or remove PDF pages; reverse page order or delete pages.
- [Add Page Numbers to PDF](https://vajba.com/add-page-numbers/): insert page numbers with control over position, format, font size, and starting number.
- [Crop PDF](https://vajba.com/crop-pdf/): crop and trim PDF pages; remove white space, auto-trim margins, or select exact dimensions.

See also: [Add Watermark](https://vajba.com/add-watermark/) supports PDFs as well as images.

## Text tools

All 14 tools at https://vajba.com/text-tools/.

- [Online Notepad](https://vajba.com/notepad/): take notes with autosave in your browser, multiple tabs, word counts, find and replace, and TXT download.
- [Word Counter](https://vajba.com/word-counter/): live word, character, sentence, and paragraph counts with reading time, speaking time, and keyword density for one, two, and three word phrases. Opens .docx, .odt, .pdf, and text files in the browser without uploading them, counts Chinese, Japanese, and Thai words, handles abbreviations and quoted speech when counting sentences, shows every place a keyword appears, and has a word or character goal, a longest sentence finder, Undo after Clear, and a copyable stats block.
- [Character Counter](https://vajba.com/character-counter/): emoji-accurate character, word, sentence, and paragraph counts with limits for X, Instagram, LinkedIn, Bluesky, Discord, and SMS message parts; marks the text that does not fit a limit.
- [Case Converter](https://vajba.com/case-converter/): convert between upper, lower, title, sentence, camel, snake, and kebab case.
- [Find and Replace](https://vajba.com/find-and-replace/): find and replace text with full regex support, case sensitivity, and bulk operations.
- [Remove Duplicate Lines](https://vajba.com/remove-duplicate-lines/): remove duplicate lines, clear blanks, sort lists, and trim whitespace.
- [Sort Lines](https://vajba.com/sort-lines/): sort text lines alphabetically, numerically, by length, or in natural order; remove duplicates and trim.
- [Readability Analyzer](https://vajba.com/readability-analyzer/): check reading grade level with Flesch-Kincaid, Gunning Fog, and other readability scores.
- [Markdown Editor](https://vajba.com/markdown-editor/): write Markdown with side-by-side live preview; export to HTML or copy the rendered output.
- [ChatGPT Text Converter](https://vajba.com/chatgpt-text-converter/): strip bold, headers, bullets, and other formatting from AI-generated text to leave clean plain text.
- [Em Dash Remover](https://vajba.com/em-dash-remover/): replace em dashes and en dashes with regular hyphens.
- [ASCII Art Generator](https://vajba.com/ascii-art-generator/): turn text into ASCII banners and retro FIGlet art across dozens of fonts.
- [Fancy Text Generator](https://vajba.com/fancy-text-generator/): convert normal text into cool fonts, aesthetic styles, and decorative characters for copy-paste.

See also: [JSON Formatter](https://vajba.com/json-formatter/) and [Diff Checker](https://vajba.com/diff-checker/) are also cross-listed under Text tools.

## Developer tools

All 45 tools at https://vajba.com/dev-tools/.

- [JSON Formatter](https://vajba.com/json-formatter/): format, minify or convert JSON to YAML without changing a number or key order. Fix broken JSON in one click and explore it in a tree view.
- [HTTP Status Codes](https://vajba.com/http-status-codes/): searchable cheat sheet of every registered HTTP status code plus unofficial nginx, Cloudflare, AWS and Laravel codes; plain-English notes, spec and vendor links, and side-by-side notes on codes that are often confused, such as 401 and 403 or 301 and 308.
- [JSON Validator](https://vajba.com/json-validator/): validate JSON and see every error at once, with line, column and a plain explanation. Fix them all in one click without changing a single value.
- [JSON to TypeScript](https://vajba.com/json-to-typescript/): turn JSON into clean TypeScript interfaces, types or a Zod schema. List items merge into one type, with optional fields where they differ.
- [JSON to CSV Converter](https://vajba.com/json-to-csv/): convert JSON to CSV that opens cleanly in Excel. Nested objects become columns, numbers stay exact, and it converts CSV back to JSON too.
- [Hide Message in Image](https://vajba.com/hide-message-in-image/): hide a secret text message inside a PNG using steganography, with optional password encryption.
- [iMessage Exporter](https://vajba.com/imessage-export/): read your Mac's Messages chat.db or an unencrypted iPhone backup in the browser and save any conversation as PDF, TXT, CSV, HTML or JSON, with search, filters, tapbacks, edits and a court-ready layout.
- [CSV to JSON Converter](https://vajba.com/csv-to-json/): convert CSV or TSV to JSON with auto-detected delimiters and a preview. Every column is kept, and zip codes and long IDs stay exactly as written.
- [YAML to JSON Converter](https://vajba.com/yaml-to-json/): convert YAML to JSON and back, editing either side. Merge keys, multiple documents and CloudFormation tags work, and long numbers stay exact.
- [XML to JSON Converter](https://vajba.com/xml-to-json/): convert XML to JSON with attributes, namespaces and repeated tags handled. Zip codes, phone numbers and long IDs stay exactly as written.
- [JSON to XML Converter](https://vajba.com/json-to-xml/): convert JSON to well-formed XML with key order and numbers kept exactly. Choose how arrays, nulls, attributes and namespaces are written.
- [XML Formatter & Validator](https://vajba.com/xml-formatter/): format messy XML with proper indentation and validate structure; minify for production.
- [Regex Tester](https://vajba.com/regex-tester/): test JavaScript regular expressions with live syntax highlighting, capture groups, and replace mode.
- [SQL Formatter](https://vajba.com/sql-formatter/): format, parse, and minify SQL queries across a dozen dialects.
- [Diff Checker](https://vajba.com/diff-checker/): compare text or code side-by-side with inline and unified diff views.
- [HTML Formatter & Minifier](https://vajba.com/html-formatter/): format, beautify, or minify HTML; clean up messy markup into properly indented output.
- [CSS Formatter & Minifier](https://vajba.com/css-formatter/): format, beautify, or minify CSS stylesheets.
- [JS Beautifier & Minifier](https://vajba.com/js-formatter/): format, beautify, or minify JavaScript code.
- [HTML to Markdown](https://vajba.com/html-to-markdown/): convert HTML to clean Markdown with GitHub Flavored Markdown support for tables and code blocks.
- [HTML Encode / Decode](https://vajba.com/html-encode-decode/): encode text to safe HTML entities or decode them back to plain text; live bidirectional conversion.
- [Base64 Encode & Decode](https://vajba.com/base64/): encode text or files to Base64 for embedding in code, or decode Base64 strings back to readable content.
- [Base64 to Image](https://vajba.com/base64-to-image/): decode Base64 strings and data URIs to images and files. Paste HTML, CSS or JSON and every embedded image is found, identified and ready to download.
- [URL Encoder / Decoder](https://vajba.com/url-encoder-decoder/): encode special characters for safe URLs or decode percent-encoded strings back to readable text.
- [Image to Base64](https://vajba.com/image-to-base64/): encode images to Base64 data URIs for embedding directly in HTML, CSS, or JSON.
- [Code to Image](https://vajba.com/code-to-image/): turn code snippets into syntax-highlighted images with custom themes and fonts; export as PNG.
- [UUID Generator](https://vajba.com/uuid-generator/): generate UUID v4 identifiers singly or in bulk; copy, format, or download.
- [Hash Generator](https://vajba.com/hash-generator/): generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files; verify file integrity with checksums.
- [AES Encrypt & Decrypt](https://vajba.com/aes-encrypt-decrypt/): encrypt and decrypt text with AES-256 and password-based key derivation; text and passwords stay in your browser.
- [Binary Translator](https://vajba.com/binary-translator/): convert text to binary or binary to text with full Unicode and UTF-8 support.
- [Slug Generator](https://vajba.com/slug-generator/): convert any text into clean, URL-friendly slugs; handles accents, special characters, and bulk input.
- [Unix Timestamp Converter](https://vajba.com/unix-timestamp-converter/): convert between Unix timestamps and human-readable dates in UTC or local time.
- [JWT Decoder](https://vajba.com/jwt-decoder/): decode and inspect JWT tokens; view header, payload, and expiration without sending the token to a server.
- [Chmod Calculator](https://vajba.com/chmod-calculator/): toggle read, write, and execute permissions for owner, group, and others; outputs octal, symbolic, and terminal forms.
- [Cron Expression Generator](https://vajba.com/cron-expression-generator/): build cron schedules visually or edit expressions directly with human-readable preview and next run times.
- [Favicon Generator](https://vajba.com/favicon-generator/): generate all favicon sizes at once; download as .ico or individual PNG files.
- [SQL Table Generator](https://vajba.com/sql-table-generator/): build CREATE TABLE statements visually for MySQL, PostgreSQL, SQLite, and more.
- [README Generator](https://vajba.com/readme-generator/): generate a professional markdown README.md for an open-source project with badges, install steps, and code snippets.
- [CSS Box Shadow Generator](https://vajba.com/box-shadow-generator/): design layered CSS box shadows visually with drag controls; copy as CSS or Tailwind.
- [CSS Gradient Generator](https://vajba.com/css-gradient-generator/): create linear, radial, and conic CSS gradients visually with drag-able color stops.
- [SEO Meta Tag Generator](https://vajba.com/seo-meta-tag-generator/): generate HTML title tags, meta descriptions, and Open Graph markup with a live Google snippet preview.
- [Robots.txt Generator](https://vajba.com/robots-txt-generator/): generate robots.txt files to control search engine access and block AI training crawlers like GPTBot.
- [Sitemap Generator](https://vajba.com/sitemap-generator/): paste a list of URLs to build a valid sitemap.xml with lastmod, changefreq, and priority set globally or per path.
- [File X-Ray](https://vajba.com/file-xray/): look inside any file; see the raw bytes as a visual map, find hidden data and metadata, and check what a file really contains before you share it.
- [Fingerprint](https://vajba.com/browser-fingerprint/): see everything a website can quietly detect about your device, browser, and hardware.

See also: [Color Contrast Checker](https://vajba.com/color-contrast-checker/) is also cross-listed under Developer tools.

## Calculators

All 17 calculators at https://vajba.com/calculators/.

- [MPH to KMH](https://vajba.com/mph-to-kmh/): convert between miles per hour and kilometres per hour; includes pace, distance, and travel time calculators.
- [Date & Time Format Converter](https://vajba.com/date-time-format-converter/): convert and format dates and times across time zones, locales, and formats like ISO 8601 and Unix timestamps.
- [BMI Calculator](https://vajba.com/bmi-calculator/): body mass index with the WHO reference scale, metric and imperial.
- [BMR Calculator](https://vajba.com/bmr-calculator/): Basal Metabolic Rate and Total Daily Energy Expenditure; map daily calories for weight loss or muscle gain.
- [VAT Calculator](https://vajba.com/vat-calculator/): add standard VAT to a net price or reverse-calculate tax from a gross receipt; custom rates or country presets.
- [GPA Calculator](https://vajba.com/gpa-calculator/): high school or college GPA with credits, letter grades, and AP/Honors weighting; weighted and unweighted averages.
- [Loan Calculator](https://vajba.com/loan-calculator/): monthly payments, total interest, and full amortization schedule for any loan.
- [Compound Interest Calculator](https://vajba.com/compound-interest-calculator/): visualize investment growth with monthly contributions, inflation, and charts.
- [Percentage Calculator](https://vajba.com/percentage-calculator/): discount, percentage change, tip math, and all common percent formulas.
- [Salary to Hourly Calculator](https://vajba.com/salary-to-hourly-calculator/): convert annual salary to hourly, daily, weekly, and monthly pay rates.
- [Margin & Markup Calculator](https://vajba.com/margin-markup-calculator/): profit margins, markup percentages, and optimal pricing from cost and selling price.
- [Electricity Cost Calculator](https://vajba.com/electricity-cost-calculator/): power consumption of any appliance; daily, monthly, and yearly cost from wattage, use, and kWh rate.
- [Unit Price Calculator](https://vajba.com/unit-price-calculator/): compare price per unit across two products; find the best value per ounce, gram, litre, or item.
- [Age Calculator](https://vajba.com/age-calculator/): exact age in years, months, days, hours, and minutes from a date of birth.
- [Days Between Dates](https://vajba.com/days-between-dates/): exact number of days, weeks, and months between any two dates.
- [Tip Calculator](https://vajba.com/tip-calculator/): calculate tip amounts and split the bill evenly between any number of people.
- [Imperial to Metric](https://vajba.com/imperial-to-metric/): two-way conversion for length, weight, volume, temperature, and area between imperial and metric units.

## Generators

All 10 generators at https://vajba.com/generators/.

- [QR Code Generator](https://vajba.com/qr-code-generator/): QR codes for URLs, text, Wi-Fi credentials, and more; custom colors; PNG or SVG output.
- [Password Generator](https://vajba.com/password-generator/): strong, cryptographically random passwords with custom length, symbols, and bulk generation.
- [Printable Calendar](https://vajba.com/print-calendar/): custom printable PDF calendar with notes, optional logo, and color theme for any month or year.
- [Invoice Generator](https://vajba.com/invoice-generator/): create professional invoices and download as PDF; add logo, line items, tax, and bank details.
- [Barcode Generator](https://vajba.com/barcode-generator/): scannable barcodes in Code 128, EAN-13, UPC-A, Code 39, and more; PNG or SVG.
- [UTM Builder](https://vajba.com/utm-builder/): build tracking URLs with utm_source, utm_medium, and utm_campaign for Google Analytics.
- [Random Number Generator](https://vajba.com/random-number-generator/): cryptographically secure random numbers, dice rolls, and coin flips with custom ranges.
- [Fake Data Generator](https://vajba.com/fake-data-generator/): plausible names, emails, and UUIDs using safe fictional patterns; seed test databases and export to JSON, CSV, or SQL.
- [Random Name Picker](https://vajba.com/random-name-picker/): spin a wheel to pick random names for classrooms, raffles, giveaways, and team decisions.
- [Lorem Ipsum Generator](https://vajba.com/lorem-ipsum-generator/): placeholder text for designs and mockups by paragraphs, sentences, or words.

## Audio tools

All 10 tools at https://vajba.com/audio-tools/. Files never leave your browser.

- [MP4 to MP3 Converter](https://vajba.com/mp4-to-mp3/): extract the audio track from MP4, MOV, MKV, and WebM video as an MP3 at 96 to 320 kbps, with the source codec and duration shown before converting.
- [Audio Converter](https://vajba.com/audio-converter/): convert audio between MP3, WAV, M4A, FLAC, and OGG, with bitrate choice for lossy formats, lossless WAV and FLAC output, and in-page playback before download.
- [Guitar Tuner](https://vajba.com/guitar-tuner/): tune by microphone with a cents needle, auto or locked string, 18 tunings for guitar, bass, ukulele, violin, viola, cello, mandolin and banjo, a chromatic mode, reference tones and an adjustable A4.
- [BPM Counter](https://vajba.com/bpm-counter/): tap along to a song on the pad or any key to count its BPM, with tempo marking, delay and LFO times for straight, dotted and triplet notes, and a metronome at the tapped tempo.
- [Mic Test](https://vajba.com/mic-test/): test your microphone with a live waveform and level meter, record and play back your voice, and check speakers.
- [White Noise Generator](https://vajba.com/white-noise/): play white, pink, brown, blue or violet noise generated live, with a tone control, a slow swell, fan and ocean presets, a sleep timer that fades out, and WAV export.
- [Speaker Test](https://vajba.com/speaker-test/): check speakers or headphones with left, right and both tones, live output meters, a stereo or 5.1 surround sequence, bass to treble tones, a sweep, and white or pink noise.
- [Tone Generator](https://vajba.com/tone-generator/): play a sine, square, triangle or sawtooth tone from 1 Hz to 20 kHz with a note and cents readout, volume, balance, sweep, and 16-bit WAV download.
- [Audio Trimmer](https://vajba.com/audio-trimmer/): trim and cut audio files with preview playback and instant download.
- [Audio Merger](https://vajba.com/audio-merger/): merge audio files into one seamless track with crossfades and drag-to-reorder.

## Everyday tools

All 9 tools at https://vajba.com/everyday-tools/.

- [Time Zone Meeting Planner](https://vajba.com/timezone-meeting-planner/): suggests the best meeting time across time zones, weighing work hours, sleep, weekends and meeting length; 1,100+ cities, shareable link, invite text and .ics export.
- [Online Alarm Clock](https://vajba.com/alarm-clock/): set up to 10 alarms with labels, four sounds, snooze and daily repeat; rings in the tab with a live countdown in the title.
- [Countdown](https://vajba.com/countdown/): bookmark-able countdown to any future date or time; share the URL to return to the same countdown.
- [Pomodoro Timer](https://vajba.com/pomodoro/): customizable work and break intervals with session tracking and audio alerts.
- [Stopwatch & Timer](https://vajba.com/stopwatch/): stopwatch with lap times and a countdown timer with hands-free keyboard shortcuts.
- [Webcam Test](https://vajba.com/webcam-test/): test webcam, resolution, frame rate, and mirror view before a video call.
- [Mic Test](https://vajba.com/mic-test/): test your microphone with a live waveform and level meter, record and play back your voice, and check speakers.
- [Keyboard Tester](https://vajba.com/keyboard-tester/): press any key to find broken keys on a layout-aware on-screen keyboard with keycode readout and rollover counter.
- [Steam & Pressure Cooker Times](https://vajba.com/steam-and-pressure-cooker-times/): 150+ steam and pressure cooker times for vegetables, meat, fish, grains, with prep notes.
- [PurineCheck](https://vajba.com/purine-check/): look up purine and uric acid content for 451 foods, per 100g and as a share of the daily limit; helpful for gout.

## Fun

All 13 games and toys at https://vajba.com/fun/.

- [2048](https://vajba.com/2048/): classic tile-merging puzzle with swipe and arrow-key controls and a personal high score.
- [Sudoku](https://vajba.com/sudoku/): Sudoku across 5 difficulty levels with smart highlighting, pencil marks, and auto-save.
- [Typing Speed Test](https://vajba.com/typing-speed-test/): WPM and accuracy test on common words, full sentences or numbers over 15 seconds to 5 minutes, with a speed-over-time chart, consistency, a per-key and per-finger breakdown, and personal bests kept on the device.
- [Click Speed Test](https://vajba.com/click-speed-test/): clicks-per-second test over 1 to 60 seconds with mouse and spacebar modes and best-score tracking.
- [Magic 8-Ball](https://vajba.com/magic-8-ball/): ask a yes-or-no question, shake (real mobile shake detection), and get one of 20 classic responses.
- [Backgammon](https://vajba.com/backgammon/): classic board game against a smart AI opponent or a local friend.
- [Flag Quiz](https://vajba.com/flag-quiz/): guess the country by its flag in a multiple-choice world flags quiz.
- [Bankrupt Elon](https://vajba.com/bankruptelon/): spend Elon Musk's money, all $1.23 trillion of it, on yachts, jets, and whole countries; watch how fast he earns it back.
- [Reaction Time Test](https://vajba.com/reaction-time-test/): click as fast as you can when the screen turns green; measures reflexes in milliseconds.
- [Anagram Solver](https://vajba.com/anagram-solver/): unscramble letters to find words for Scrabble, Wordle, and crosswords; supports tiles and wildcards.
- [Take a break](https://vajba.com/coffee-break/): convincing terminal-style updater screen for when you need an excuse to grab coffee.
- [Split-Flap Display](https://vajba.com/split-flap-display/): turn any screen into a retro airport flip board with custom messages, weather, and news.
- [Word Clock](https://vajba.com/word-clock/): fullscreen clock that displays the current time as illuminated words on a letter grid.
- [Word Rush](https://vajba.com/word-rush/): timed 5-letter word game; solve words against the clock to earn bonus time and build a streak.

## Automotive

All 28 calculators at https://vajba.com/automotive/. Performance car math, each validated against a published reference with its real-world accuracy stated at the result.

- [Tire Size Calculator](https://vajba.com/automotive/tire-size-calculator/): compare two tire sizes drawn to scale, with diameter, sidewall, revs per mile, and the speedometer and odometer error the swap causes.
- [Gear Ratio Calculator](https://vajba.com/automotive/gear-ratio-calculator/): rpm in every gear at a given cruise speed, shift-drop rpm, speed per 1,000 rpm, and top speed at redline on an interactive chart.
- [Horsepower from Trap Speed](https://vajba.com/automotive/horsepower-from-trap-speed/): four published formulas turn a quarter mile trap speed into horsepower, each shown with its real accuracy, plus a launch check that reads the ET.
- [Fuel Injector Size Calculator](https://vajba.com/automotive/injector-size-calculator/): lb/hr and cc/min per injector from power, BSFC, and duty cycle, with E85 sizing, fuel pressure correction, and a reverse check on existing injectors.
- [Compression Ratio Calculator](https://vajba.com/automotive/compression-ratio-calculator/): static and dynamic compression from the full volume budget, with quench distance, displacement, and a solver for the chamber volume a target ratio needs.
- [Boost to Horsepower Calculator](https://vajba.com/automotive/boost-horsepower-calculator/): estimated power from the boost pressure ratio with an honest efficiency band, and the boost needed for a target power.
- [Quarter Mile Calculator](https://vajba.com/automotive/quarter-mile-calculator/): ET and trap speed from power and weight via four published formulas, each with its real accuracy, plus an eighth mile conversion with the honest factor range.
- [Wheel Offset Calculator](https://vajba.com/automotive/wheel-offset-calculator/): compare two wheels on the same hub face, drawn to scale: poke at the fender, clearance at the strut, backspacing, and an optional spacer folded in.
- [Engine Displacement Calculator](https://vajba.com/automotive/engine-displacement-calculator/): bore, stroke and cylinders to cc, liters and cubic inches, with a to-scale cylinder drawing, rod ratio, mean piston speed in context, and common overbores.
- [Carb CFM Calculator](https://vajba.com/automotive/carb-cfm-calculator/): displacement and rpm to the carburetor rating to buy, as an honest range across volumetric efficiency, with two-barrel vs four-barrel ratings handled correctly.
- [Horsepower Torque Calculator](https://vajba.com/automotive/horsepower-torque-calculator/): convert between hp, kW or PS and lb-ft or Nm at any rpm, solve for whichever value is missing, and see why every dyno graph crosses at 5252 rpm.
- [Top Speed Calculator](https://vajba.com/automotive/top-speed-calculator/): drag-limited top speed from power, CdA and weight via the road-load equation, with cited body-shape presets and an honest CdA sensitivity band.
- [Race Fuel Calculator](https://vajba.com/automotive/race-fuel-calculator/): fuel for a race or stint from lap time and burn per lap, with stints, pit stops and margins for iRacing, ACC and track days.
- [AFR Lambda Calculator](https://vajba.com/automotive/afr-lambda-calculator/): convert AFR to lambda and back for seven fuels, with custom ethanol blends and the same mixture shown in every fuel.
- [Fuel Pump Calculator](https://vajba.com/automotive/fuel-pump-calculator/): required pump flow in lph and gph from power and BSFC, at the rail pressure boost really creates.
- [Corner Weight Calculator](https://vajba.com/automotive/corner-weight-calculator/): four scale readings become total, front, rear, left, right and cross weight percent on a top-view diagram of the car.
- [Power to Weight Ratio Calculator](https://vajba.com/automotive/power-to-weight-calculator/): one power and one weight as hp per ton in both the US and UK sense, hp per tonne, kg per hp, lb per hp and W/kg, with a second car side by side to compare.
- [0-60 Calculator](https://vajba.com/automotive/0-60-calculator/): 0 to 60 mph and 0-100 km/h estimated from power, weight, drivetrain and tires; a simulated run, grip first and power after, with the range and every assumption shown.
- [Density Altitude Calculator](https://vajba.com/automotive/density-altitude-calculator/): pressure, temperature and humidity to air density, density altitude and relative air density, plus SAE J1349, STD, DIN and ECE dyno correction factors side by side.
- [Spring Rate Calculator](https://vajba.com/automotive/spring-rate-calculator/): coil dimensions to spring rate, wheel rate through the motion ratio, and ride frequency per corner, with every number in lb/in, N/mm and kg/mm at once.
- [E85 Mix Calculator](https://vajba.com/automotive/ethanol-blend-calculator/): how much E85 to add for an E30 or E50 blend, what two fuels make when mixed, and the fill for a target ethanol content, with the pump label range carried through.
- [Torque Wrench Extension Calculator](https://vajba.com/automotive/torque-wrench-extension-calculator/): the setting to dial in when a crowfoot or adapter extends the wrench, at any angle, in Nm, lb-ft and lb-in, both directions, from exact lever math.
- [Toe and Camber Calculator](https://vajba.com/automotive/camber-toe-calculator/): convert toe between mm, inches, degrees and minutes at any rim or tire diameter, per wheel or total, and camber from a straight edge offset and gauge height.
- [Drag Race Calculator](https://vajba.com/automotive/drag-race-calculator/): predict a dial-in from today's density altitude or your own run log, then score a bracket round: head start, package, breakout, red light, margin in seconds and feet, and what it took.
- [Speedometer Calculator](https://vajba.com/automotive/speedometer-calculator/): what a gear or tire change did to the speedometer and odometer, the driven gear or ratio adapter that fixes it, and pulses per mile from an output-shaft, wheel or cable-driven sensor against the 4,000 and 8,000 PPM standards.
- [Turning Radius Calculator](https://vajba.com/automotive/turning-radius-calculator/): curb-to-curb and wall-to-wall turning circle from wheelbase, track, overhangs and steering angle, or the Ackermann wheel angles backed out of a published circle, with every radius, the swept band, U-turn width and a to-scale drawing.
- [Starting Line Ratio Calculator](https://vajba.com/automotive/starting-line-ratio-calculator/): first gear times axle against the 9 to 11 band, the tire adjustment, where first gear runs out at the shift rpm, the first gear that lands on target with your axle, and the final drive from trap speed, rpm, tire and converter slip.
- [Pulley Calculator](https://vajba.com/automotive/pulley-calculator/): pulley ratio, overdrive and blower or impeller speed against the maker's limit with sourced presets and an optional jack shaft, a chart of neighbouring pulley sizes, belt speed and belt length change, reverse solvers for a target speed or boost, and a boost estimate that names its model.

## Site information

- [About Vajba](https://vajba.com/about/): mission, hosting, and how Vajba sustains itself without ads or tracking.
- [Privacy](https://vajba.com/privacy/): what Vajba does not collect, and why.
- [Tools directory](https://vajba.com/tools/): human-readable index of every tool with card descriptions.
- [Sitemap](https://vajba.com/sitemap.xml): XML sitemap of all pages.