Free toolsDevelopers
Colour contrast checker
Check text and background colours against accessibility rules.
Runs in your browser
Large heading text
Normal body text should be easy to read for everyone, including people with low vision.
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- JSON formatter and validatorPretty-print, minify and validate JSON with clear error messages.
- Base64 and URL encoderEncode and decode Base64, URLs and HTML entities.
- UUID and hash generatorGenerate UUIDs and SHA hashes of any text.
- Ghana network checkerSee which network a number is on, or check a whole list at once.