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>_ DEVELOPER TOOLS

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Looking for the full developer surface? Visit the Developer Hub for the public API (30+ endpoints), hosted MCP server, code recipes, cheatsheets, and editorial coverage.

{ } JSON Formatter Format, validate & minify JSON </> Base64 Encode/Decode Encode & decode Base64 strings # UUID Generator Generate v4 UUIDs instantly Timestamp Converter Convert Unix timestamps ↔ dates JWT Decoder Decode & inspect JWT tokens .* Regex Tester Test regex patterns with live matching Diff Checker Compare two texts & see every difference Cron Builder Build & decode cron expressions visually #! Hash Generator MD5, SHA-1, SHA-256, SHA-512 & HMAC Color Converter HEX, RGB, HSL & contrast checker API Tester Send HTTP requests & inspect responses M↓ Markdown Editor Write & preview Markdown live YAML ↔ JSON Convert & validate YAML and JSON rwx Chmod Calculator Linux file permission calculator : Port Reference Common TCP/UDP ports & services *** Password Generator Strong random passwords instantly QR Code Generator Generate QR codes from text or URLs Lorem Ipsum Placeholder text with fun variants ?! HTTP Status Codes Search any status code for meaning & fixes % URL Encode/Decode Percent-encode URLs & parse components & HTML Entities Encode & decode HTML special characters Satoshi Converter Convert sats ↔ BTC ↔ USD with live price Ξ Gwei Calculator ETH gas units & transaction cost estimator 0x Hex Converter Hex, decimal, binary, octal, ASCII & color preview / Slug Generator Convert text to URL-safe slugs (handles unicode, German) Aa Case Converter camelCase ↔ snake_case ↔ kebab-case & 7 more Text Stats Word, char, line, sentence count + reading time Image to Base64 Drop image, get data URI for HTML/CSS/Markdown HMAC Generator SHA-1/256/384/512 with secret key, hex & base64 Markdown Table Visual table builder, paste TSV/CSV, set alignment CSV ↔ JSON Two-way converter, header-aware, quote-safe $. JSONPath Tester Live query JSON with $, ., [n], [*], .. expressions Curl to Code Convert curl to fetch / Python requests / axios {T} JSON to Types Generate TypeScript / Go / Pydantic / Rust types 🔑 SSH Key Generator Ed25519 or RSA, OpenSSH format, 100% local