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  • Paste & share
  • Word & character counter
  • Case converter
  • Text diff / compare
  • Lorem ipsum generator
  • Find & replace
  • Text to slug / URL encode
  • Remove duplicate lines
  • JSON formatter / validator
  • JSON to CSV / XML / YAML
  • HTML beautifier / minifier
  • CSS beautifier / minifier
  • JavaScript beautifier / minifier
  • SQL formatter
  • Regex tester
  • Cron expression builder
  • Markdown editor
  • Code screenshot
  • Base64 encode / decode
  • URL encode / decode
  • HTML entity encode / decode
  • JWT decode / inspect
  • Hash generator
  • UUID / ULID generator
  • Unix timestamp converter
  • Number base converter
  • Image compressor
  • Image format converter
  • Image resizer & cropper
  • SVG optimiser
  • Favicon generator
  • Base64 ↔ image
  • Colour picker
  • Palette generator
  • Contrast checker (WCAG)
  • CSS gradient generator
  • PDF merge
  • PDF split
  • PDF compress
  • HTML / Markdown to PDF
  • QR code generator & reader
  • Password generator
  • URL shortener
  • IP / network lookup
  • Speed test
  • Emoji picker
  • OG meta tag previewer
  • AI code explainer
  • AI regex builder
  • AI SQL writer
  • AI JSON schema generator
  • AI colour palette

Colour

4 tools in this category

Colour picker

Pick colours in HEX, RGB, HSL, and OKLCH.

Palette generator

Generate harmonious palettes and extract from images.

Contrast checker (WCAG)

Check colour contrast for accessibility.

CSS gradient generator

Build linear and radial gradients, copy CSS.

ZeroKit

52 free online tools for developers, designers, and everyone. Client-side by default — your data never leaves your browser.

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