JSON Formatter/Validator
Validate and pretty-print JSON
Usage
Paste JSON on the left and choose Pretty or Minify.
Enable "Sort keys" to alphabetize object keys.
Example: {"hello":"world"} pretty-prints to a readable format.
FAQ
Is key sorting safe?
It reorders object keys. Turn it off for strict comparisons; enable for readability.
Are comments allowed?
Not in standard JSON (JSON5 allows them). This tool targets standard JSON.
Trailing commas?
Invalid in standard JSON. Please remove them before pasting.
Large file performance?
Rendering runs in the browser; multi‑MB files may be slow. Disable live validation if needed.