Developer Tools
4 local browser utilities
Inspect, format, validate, and encode developer payloads locally in volatile browser memory without transmitting data over the network.
Available Developer Tools
100% Local (client-worker)
JSON Formatter
Beautify or minify JSON payloads up to 10 MB in a background Web Worker with optional recursive key sorting.
Open JSON Formatter
100% Local (client-worker)
JSON Validator
Validate JSON against RFC 8259 with exact line/column error pointers and one-click JSONC trailing-comma repair.
Open JSON Validator
100% Local (client-main)
Base64 Encoder & Decoder
Encode and decode multi-byte UTF-8 strings between plain text, standard Base64, and URL-safe Base64url.
Open Base64 Encoder & Decoder
100% Local (client-main)
URL Encoder & Decoder
Encode and decode URL query parameters and full URIs locally with RFC 3986 and form-urlencoded space handling.
Open URL Encoder & Decoder