Developer Tools
Clean, ad-free tools built for developers.
JSON Linter & Formatter
Validate and format JSON instantly in your browser. Clean output, readable errors.
Diff Checker
Compare two texts side-by-side with highlighted additions and deletions.
Regex Tester
Test regular expressions with live matching, capture groups, and flag toggles.
YAML ↔ JSON Converter
Convert between YAML and JSON formats instantly. Bidirectional with swap.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates with live clock.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes using Web Crypto API.
Color Converter
Convert between HEX, RGB, and HSL with live preview and WCAG contrast check.
Cron Expression Parser
Parse cron expressions into plain English with next scheduled run times.
Markdown Viewer
Paste Markdown and see it rendered in real-time. Supports GFM tables, code blocks, and task lists.
Mermaid Viewer
Write Mermaid diagram syntax and see it rendered live. Export as SVG or PNG.
Base64 Encoder & Decoder
Encode and decode Base64 strings instantly. Handles UTF-8 text.
URL Encoder & Decoder
Encode special characters for URLs or decode percent-encoded strings.
JWT Decoder
Decode JSON Web Tokens. View header, payload, and check expiration.