Free tools that run in your browser. No sign-up, no uploads.

Free Developer Tools

Everything in developer, in one place. Pick a tool and get your answer in seconds.

100+ tools

Formatters and Minifiers

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JSON Formatter Format, check and read JSON
JSON Validator Check JSON and see what to fix
XML Formatter Paste, process, copy
HTML Formatter Paste, process, copy
CSS Formatter Paste, process, copy
JavaScript Formatter Paste, process, copy
SQL Formatter Paste, process, copy
YAML Validator Check YAML and see what to fix
HTML Minifier Paste, process, copy
CSS Minifier Paste, process, copy
JavaScript Minifier Paste, process, copy
JSON Minifier Paste, process, copy
GraphQL Formatter Paste, process, copy
Markdown Editor Paste, process, copy
JSON Viewer Paste, process, copy

Encoders and Decoders

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Base64 Encode Decode Encode or decode in a click
Base64 to Image Converter Convert base64 to image in seconds
Image to Base64 Converter Convert image to base64 in seconds
URL Encode Decode Paste, process, copy
HTML Entity Encoder Paste, process, copy
JWT Decoder Paste, process, copy
JWT Encoder Paste, process, copy

Generators

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UUID Generator Make an UUID in seconds
Cron Expression Generator Make a cron expression in seconds

Code Converters

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JSON to TypeScript Converter Convert JSON to TypeScript in seconds

Testers and Playgrounds

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Regex Tester Test patterns with live matches
Diff Checker Check diff and see what to fix

Web Utilities

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Subnet Calculator Work out subnet with the steps shown

CSS and Design

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CSS Gradient Generator Make a CSS gradient in seconds
Box Shadow Generator Make a box shadow in seconds