Developer Tools
JSON, JWT, base64, regex, and more. Keyboard-first, offline-capable, dark by default.
JSON Formatter
Format, validate, and minify JSON. Catches syntax errors with line + column.
JWT Decoder
Decode JWT headers + payloads. Surfaces issued, expires, and notBefore timestamps.
Base64 Encode / Decode
Encode text to base64 or decode base64 back to text. UTF-8 safe.
URL Encode / Decode
Percent-encode strings for URLs, or decode them back. Includes a query string parser.
UUID Generator
Generate v4 (random) or v7 (time-ordered) UUIDs. Bulk-generate up to 1000.
Timestamp Converter
Convert between Unix timestamps and ISO 8601 dates. Auto-detects seconds, ms, or microseconds.
Hash Generator
MD5, SHA-1, SHA-256, SHA-512 hashes — computed locally in your browser.
Color Converter
Convert between HEX, RGB, HSL, and OKLCH. Live color picker with CSS-ready output.
Cron Parser
Translate cron expressions into plain English, see a field-by-field breakdown, and preview the next 5 run times in your timezone.
Diff Checker
Side-by-side text comparison. Highlights additions, deletions, and unchanged lines.
Markdown Preview
Type Markdown on the left, see it rendered to HTML on the right in real time.
SQL Formatter
Format SQL across 8 dialects with full options, plus a lint pass that flags SELECT * and dangerous UPDATE/DELETE without WHERE.
YAML ↔ JSON
Convert YAML to JSON and back. Preserves keys, lists, nesting, and primitive types.
JSON ↔ CSV
Convert CSV and JSON either way with delimiter auto-detect, a sortable table preview, error reporting, file load and download — all in your browser.
Regex Tester
Test regular expressions live. Highlights matches and shows capture groups.
Code to Image
Turn code into a beautiful, shareable image. Syntax highlighting, themes, backgrounds, and one-click export — all in your browser.