Free online developer tools. Fast, private, no signup. Everything runs in your browser.
Format, minify, and validate JSON with syntax highlighting
Encode text to Base64 or decode Base64 to text
Generate v4 UUIDs instantly. Bulk generation supported.
Decode and inspect JWT tokens (header, payload, dates)
Generate MD5, SHA-1, SHA-256, SHA-512 hashes
Test regular expressions with real-time matching
Encode or decode URL components
Compare two texts and see differences highlighted
Convert between HEX, RGB, HSL color formats
Convert between Unix timestamps and human dates
Live preview of Markdown with GitHub-flavored syntax
Generate placeholder text for your projects
Chrome extension with tree view, diff, JSONPath, schema validation & more
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