Pretty-print, minify and validate JSON with every error listed by line and column – numbers and strings are kept exactly as written.
Paste JSON and it is checked as you type: trailing commas, single quotes, comments or a missing bracket are listed with their line and column and marked in the editor. Format with 2 spaces, 4 spaces or tabs, sort keys, or minify.
Big numbers such as 12345678901234567890 stay untouched instead of being rounded, and a JSONC switch accepts comments and trailing commas for files like tsconfig.json.
Open JSON formatter
or type develzone.org/json