Format, validate, and beautify JSON instantly. Syntax errors highlighted in real-time.
Generate RFC-4122 v4 UUIDs and NanoIDs. Batch mode available for bulk generation.
Remove special characters, extra whitespace, and normalize line breaks instantly.
Convert between Markdown and HTML with live preview. Copy-ready output.
Encode and decode Base64 strings. Supports text and binary data.
Seamlessly convert between YAML and JSON formats. Perfect for configs.
Safely encode and decode URLs. Build query strings without errors.
Generate MD5, SHA-1, SHA-256 hashes. File checksums supported.
Create QR codes for URLs, text, Wi-Fi, vCards. Download as PNG or SVG.
Test regular expressions with live matching. Includes cheat sheet.
Convert Unix timestamps to dates. Timezone support included.
Convert HEX ↔ RGB/HSL. Includes contrast checker for accessibility.
Try different keywords or clear filters
Privacy-first utilities built for modern developers
Everything runs locally in your browser. Your input data never leaves your device—no server uploads, no cloud storage, no processing on our end.
No API calls, no loading spinners. Tools respond instantly because they run directly in your browser's JavaScript engine.
No login walls. No upgrade prompts. No newsletters. Just tools that work exactly as you'd expect them to work.
Got a workflow that needs automation? Send us your idea—we'll build it if it's useful for other devs too.
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