Dev Utility
Developer-focused utility tools
HTML Entity Encoder / Decoder
FreeEscape or unescape HTML special characters (& < > " \') so you can embed text safely in markup.
CSV ↔ JSON Converter
FreeConvert CSV to a JSON array of objects, or back. Handles quoted fields and Unicode.
Base64 Encoder / Decoder
FreeEncode any text (including emoji, multi-byte characters) to Base64 and decode it back.
URL Encoder / Decoder
FreePercent-encode strings for safe use in URLs, query strings and webhook payloads. Decode existing percent-encoded values back to readable text.
JSON Formatter & Validator
FreePretty-print, minify, and validate JSON in your browser. Nothing leaves your device.