Developer Helper Utilities
Free developer helper tools: Base64 encoder/decoder, UUID generator, timestamp converter, regex tester, YAML formatter, JWT decoder, and more. By Graph Tools.
- Base64 Encode / Decode — Encode text or files to Base64, or decode Base64 strings back to readable output
- UUID Generator (v4 / v7) — Generate UUID v4 or v7 instantly with bulk output options, formatting controls, and fast copy/download
- Timestamp Converter — Convert Unix timestamps and human-readable date/time values with UTC, local time, ISO 8601, and millisecond precision support
- URL Query String Parser — Parse full URLs or raw query strings into decoded parameters, base URL, and structured components with copy-friendly output
- Regex Tester & Groups — Test regular expressions against sample text with live match preview, capture group extraction, named groups, and flag controls
- YAML Formatter & Validator — Format, beautify, and validate YAML with clean error reporting, indentation controls, alias support, and copy/download output
- TOML Formatter & Validator — Format and validate TOML files with line-aware error reporting, TOML-aware table detection, key sorting, and copy/download output
- ENV ⇄ JSON Converter — Convert
- HTML Entity Encode / Decode — Encode text into HTML entities or decode HTML entities back to readable text
- String Escape / Unescape — Escape or unescape strings for JSON, HTML, XML, JavaScript, SQL, Java/
- JWT Decoder & Expiry Checker — Decode JWT header and payload, inspect all claims, and check token expiry with clear warnings for expired or soon-to-expire tokens
- UUID Validator — Validate UUID strings, detect version and variant, inspect formatting issues, and run batch validation
- Color Converter — Convert colors between HEX, RGB, and HSL formats with live preview, contrast ratio guidance, and copy-ready output
- MIME Type Detector — Detect MIME type from file content or magic bytes with confidence scoring and developer-friendly output
- YAML Diff Tool — Compare two YAML documents with YAML-aware change detection, structured side-by-side diff output, and copy/download