20 free developer tools
From JSON to JWT, colour conversion to QR codes: tools that speed up everyday work. No account, no data collection. Everything runs instantly in your browser.
Data conversion
Security & identity
JWT Decoder
Read the header and payload of a JSON Web Token.
UUID Generator
Generate unique UUID v4 identifiers in one click and copy as many as you need.
Password Generator
Pick a length and character sets and generate secure random passwords.
Hash Generator
Calculate SHA-1, SHA-256 and SHA-512 hashes of your text instantly.
Text & content
Lorem Ipsum
Generate placeholder text of any length for your designs.
Markdown Preview
Write Markdown and see it rendered live on the right.
Regex Tester
Test your regular expression on real text and see the matches.
Text Diff
Put two texts side by side and see line-by-line differences in colour.
Case Converter
Convert text to camelCase, snake_case, kebab-case and PascalCase.
Word Counter
Count words and characters and estimate reading time.