05 // Unicode, Symbol & Encoding WorkbenchJSON-FORMATTER
JSON Formatter, Syntax Validator & Minifier Workbench
Formats, validates, alphabetically canonicalizes keys, and minifies JSON payloads 100% locally in your browser — safe for sensitive API responses and config files.
✓ VALID JSON
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Reference Table
- 01RFC 8259 strict JSON requires double-quoted property names, forbids trailing commas, and forbids `NaN`, `Infinity`, `undefined`, or comments.
- 02Deterministic key sorting produces canonical JSON ideal for `git diff` comparisons and content hashing.
Frequently Asked Questions
Are my pasted JSON payloads sent over the network?+
No — `JSON.parse` and `JSON.stringify` execute 100% inside your local browser tab with zero network requests.
Why does strict `JSON.parse` reject trailing commas?+
RFC 8259 inherited minimal grammar rules for universal parser interoperability; trailing commas are valid in JSON5/JSONC but invalid in standard `application/json`.
How much bandwidth does JSON minification save?+
Stripping indentation whitespace typically shrinks raw byte size by 15%–35% prior to Brotli/Gzip compression.