Dev Tools
For Makers

Convert between HEX, RGB, HSL, OKLCH, OKLab, and LAB colour formats.

Generate colour palettes with 28 strategies across 6 categories.

Check WCAG contrast ratio for AA and AAA compliance.

Generate complementary, analogous, triadic, tetradic, and split harmonies.

Generate Tailwind CSS colour scales from 50 to 950 with 4 modes.

Simulate 8 types of colour vision deficiency on colours and images.

Crop images to aspect ratios like 1:1, 4:5, 16:9 for social platforms.

Place non-square images on square or custom-ratio mattes.

Split wide images into Instagram carousel tiles.

Composite watermarks onto images with position, opacity, and scale.

Convert between PNG, JPEG, WebP, GIF, BMP, TIFF, and ICO formats.

Split an image into a grid of tiles by rows and columns.

Generate multi-size favicons for web and mobile from any image.

Minify and optimise SVG files for smaller file sizes.

Add film-grain colour noise to images and digital artwork.

Remove image backgrounds using machine learning.

Trace raster images to SVG vector output.

Trim transparent edges from PNG images automatically.

Convert pixels to rem units based on a configurable root font size.

Convert rem units back to pixels.

Compute line-height values for any font size with named ratios.

Convert between pt, px, mm, em, rem, pc, in, and cm units.

Count words, characters, sentences, and estimate reading time.

Look up ISO A/B/C series and US paper size dimensions.

Browse Unicode characters by codepoint, named range, or search.

Extract metadata from TTF, OTF, WOFF, and WOFF2 font files.

Test regular expressions against input text with flags support.

Transliterate English text to the Shavian alphabet.

Evaluate math expressions with trig, logs, powers, and constants.

Convert between decimal, hex, octal, and binary number bases.

Unix timestamps, date arithmetic, and timezone conversion.

Convert length, weight, data, temperature, volume, speed, pressure.

Encode text to Base64 or URL encoding.

Decode Base64 or URL-encoded text.

Generate MD5, SHA256 and other hash digests of text.

Generate styled QR codes with custom colours and logo overlay.

Generate 1D/2D barcodes including EAN13 and Code128.

Generate HTML meta tags, Open Graph, and Twitter Cards.

Analyse PDF print-readiness — version, pages, fonts, and bleed.

Impose PDF pages for saddle-stitch, perfect-bound, and n-up booklets.

Create mini-8 fold zines and accordion concertina layouts.

Generate shell completion scripts for bash, zsh, and fish.

Machine-readable usage reference for AI agents and automation.

Install bundled man pages for offline reference.