Ois Tools
Delphi's Greatest Hits
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Colour
Colour Blindness Simulator
Simulate how colours appear to colour blind users
Colour Converter
Convert between colour formats
Contrast Checker
Check WCAG colour contrast compliance
Gradient GeneratorNew
Create linear, corner, and mesh gradients
Harmony Generator
Generate colour harmonies
Palette Collection
Browse curated colour palettes
Palette ExtractorNew
Extract colour palettes from images
Palette Generator
Generate beautiful colour palettes
Pixel PickerNew
Sample colours from any image with a zoom loupe
Tailwind Shade Generator
Generate Tailwind colour scales
Images & Assets
Artwork Enhancer
Add colour noise overlay to artwork
Background RemoverBeta
Remove backgrounds from images automatically
Favicon Generator
Generate favicons from any image
Image ClipperNew
Trim transparent edges from PNGs to the smallest dimensions
Image Converter
Convert between PNG, JPEG, WebP, AVIF, GIF, BMP, TIFF, ICO, ICNS with resize and format options
Image Splitter
Split images into tiles
Image TracerNew
Trace raster images to SVG vectors
Paste Image
Paste and download an image from your clipboard
Placeholder Generator
Generate placeholder images
SVG Optimiser
Optimise and minify SVG files
Typography & Text
Document ConverterNew
Convert documents between Markdown, HTML, Word, LaTeX, EPUB and more
Text EditorNew
Distraction-free Markdown writer
Font File Explorer
Explore font file contents
Glyph Browser
Browse unicode glyphs
Line Height Calculator
Calculate optimal line heights
Paper Sizes
Reference for paper dimensions
PX to REM
Convert pixels to rem units
Text DiffNew
Compare two texts and highlight differences
Typography Calculator
Convert between typographic units
Word Counter
Count words, characters and more
Print & Production
Other Tools
Barcode Generator
Generate Data Matrix, Aztec, PDF417, Code 128, EAN-13, and more
Cipher DecoderNew
Decode classical ciphers manually or auto-detect the cipher
Meta Tag Generator
Generate HTML meta tags
QR Generator
Generate styled QR codes with custom colors, shapes, and logos
Regex Tester
Test regular expressions
Tailwind Cheat Sheet
Quick reference for Tailwind classes
Text Scratchpad
Text editor with manipulation tools
Calculators
Algebra Calculator
Symbolic algebra: simplify, factor, solve, derivatives
Base Converter
Convert between decimal, hex, binary, and octal
Encoding Tools
Base64, URL encoding, and hash generation
Graph Calculator
Plot and visualise mathematical functions
Scientific Calculator
Full-featured scientific calculator with history
Time Calculator
Unix timestamps, date arithmetic, timezone conversion
Unit Converter
Convert between units of length, weight, data, and more
Turbo-nerd Shit
Friends of Ois Tools
Stickers
Free for the taking. Peel one off and it'll download a high-res PNG — print it, cut it out, slap it on your laptop.
About
Ois Tools is a collection of small, focused utilities that respect your privacy and work entirely in your browser. No data leaves your machine, no accounts required, no tracking. Just tools that do what they say.
I love the web. The classic, real web full of weird things. And that web is out there. You just have to find it. And sometimes, you have to make it yourself.
Contributors
Built with Next.js, Tailwind CSS, and shadcn/ui. All processing happens locally in your browser.