All tools
106 tools across 11 categories. Every one runs locally in your browser — press ⌘K anywhere to jump straight to one.
Text
Count, clean, convert and compare
Word & character counter Live word, character, sentence and paragraph counts. Case converter Convert between UPPER, lower, Title, camelCase and snake_case. Remove duplicate lines Strip repeated lines from a list, keeping the first of each. Sort lines Sort a list A–Z, by length, naturally, or shuffle it. Find & replace Replace text or regex matches, with a live match count. Diff checker Compare two texts and see exactly what changed. Reverse text Flip characters, word order, or the order of lines. URL slug generator Turn titles into clean URL slugs. Handles accents. Lorem ipsum generator Generate placeholder text as plain text or HTML. Remove line breaks Join broken lines back into flowing paragraphs. Remove extra spaces Collapse double spaces, trim lines, drop blank lines. Extract from text Pull emails, links, numbers or your own pattern out of text. Word frequency Count word and phrase frequency, with stop-word filtering.
Developer
Encode, format, generate
JSON formatter & validator Beautify, minify and validate JSON with error locations. Base64 encode & decode Encode or decode Base64, including URL-safe variants. URL encode & decode Percent-encode or decode URLs, and inspect the parts. HTML entity encode & decode Escape HTML special characters, or decode entities back. JSON ↔ CSV converter Convert between JSON arrays and CSV, both directions. UUID generator Generate random v4 or time-ordered v7 UUIDs in bulk. Hash generator MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 at once. Color converter Convert HEX, RGB, HSL and HSV, with WCAG contrast checks. JWT decoder Decode a JWT and inspect its claims and expiry. Regex tester Test a regular expression with live match highlighting. Cron expression generator Explain a cron expression and see its next run times. QR code generator Make QR codes for links, Wi-Fi, email or contacts. JSON ↔ YAML ↔ XML Convert between JSON, YAML and XML in any direction. Password generator Cryptographically random passwords with a strength readout. Unix timestamp converter Epoch to date and back, with the unit auto-detected.
Money
Tax, loans and returns
Currency converter Convert between 160+ currencies at live daily rates. Tip calculator Tip amount, total, and what each person pays. Split the bill Divide a bill evenly, tip included. Discount calculator Sale price, discount percent, or the original price. Compound interest Growth with regular contributions, year by year. Savings goal How long it takes, or how much per month. Hourly to salary Convert pay between hourly, monthly and annual. Markup vs margin Markup and margin from cost and price. Break-even calculator Units and revenue needed to cover your costs. VAT calculator (EU) Calculate net, VAT and gross with country rates. Supports decimal comma. Loan calculator (+ extra payments) Monthly payment, interest, months saved with extra. ROI & CAGR calculator Return on investment and annualized growth (CAGR).
Math
Percentages, units and numbers
Fraction calculator Exact fraction arithmetic, simplified, with mixed numbers. Ratio calculator Simplify a ratio, see shares, and solve a : b = c : x. Average calculator Mean, median, mode, range, deviation and quartiles. Number base converter Convert between binary, octal, decimal, hex and base 36. Roman numeral converter Numbers to Roman numerals and back, with validation. GCD & LCM calculator Greatest common divisor and lowest common multiple. Quadratic equation solver Solve ax² + bx + c = 0, including complex roots. Scientific notation converter Convert to scientific and engineering notation. Percentage calculator Percentage change, apply % to a value, margin & markup. Unit converter Length, mass, volume, temperature conversions.
Time
Dates, durations and zones
Age calculator Exact age in years, months and days, plus next birthday. Date countdown Live countdown to any date and time. Time zone converter Compare a time across multiple zones at once. Add days to date Add or subtract days, weeks, months or years. Duration calculator Time between two dates and times, every way. Week number ISO and US week numbers for any date. Timesheet calculator Add up worked hours with breaks and overnight shifts. Days between dates Count days and optional business days between two dates.
Images
Edit without uploading
Image cropper Crop to any area or a fixed aspect ratio. Image compressor Shrink JPEG, PNG and WebP files in your browser. Image format converter Convert between JPEG, PNG and WebP locally. Rotate & flip image Rotate 90/180/270 and mirror horizontally or vertically. Favicon generator Generate all six favicon sizes from one image. Image to Base64 Convert an image to a data URI, with CSS and HTML snippets. Color picker from image Click any pixel to get its hex, plus a dominant palette. QR code reader Decode a QR code and inspect the destination safely. EXIF metadata viewer See what a photo reveals, then strip it without quality loss. Video to GIF Turn a short clip into a GIF, right in your browser. GIF frame extractor Split a GIF into its frames, composited correctly. HEIC to JPG Convert iPhone HEIC photos to JPG locally, in batches. Image resizer Resize/compress images in your browser. No uploads.
Files
PDF and data tools that stay local
Protect PDF Add a password with genuine AES-128 encryption, locally. Crop PDF Trim margins by dragging, or type exact measurements. PDF watermark Stamp text across every page; text stays selectable. PDF page numbers Number every page — pick corner, format and start. Signature maker Draw with mouse or finger; download a transparent PNG. Sign a PDF Draw a signature and place it exactly where it belongs. PDF to JPG Export PDF pages as JPG or PNG, up to 300 DPI. Compress PDF Shrink a PDF by re-encoding each page as an image. Unlock PDF Remove a password you know, saving an open copy. PDF to text Pull the text out of a PDF and copy or save it. Organize PDF Reorder, delete, rotate and extract pages in one pass. JPG to PDF Combine images into a single PDF, in your order. Subtitle converter Convert between SRT, WebVTT, SBV and ASS. Subtitle sync fixer Shift every timestamp, or fix frame-rate drift. Subtitle to text Turn a subtitle file into a plain transcript. File size converter Convert file sizes and estimate download time. Merge PDF Combine PDFs in your browser. No uploads. Split PDF Split a PDF into parts or by pages. No uploads. Rotate PDF Rotate pages in a PDF and download. No uploads.
Health
Body and fitness numbers
BMI calculator Body mass index, category and healthy range for your height. TDEE & BMR calculator Resting and daily calorie burn, with targets by goal. Running pace calculator Pace per km and mile, speed, and predicted race times. Ideal weight calculator Devine, Robinson, Miller and Hamwi, side by side. Water intake calculator Rough daily water target from weight, exercise and climate.
Food
Kitchen measurements
Random
Dice, draws and decisions
Creative
Pixel art, ASCII, dithering and palettes
Image to pixel art Turn a photo into pixel art with retro palettes and dithering. ASCII art generator FIGlet text banners and image-to-ASCII, with ready-made export formats. Colour palette from image Pull a colour palette out of a picture, with HEX, RGB and HSL. Dither & halftone Floyd–Steinberg, Atkinson, Bayer dithering and halftone screens. Sprite sheet cutter Slice a sprite sheet into frames, preview the animation and export.