Runs locally in your browser. Nothing you enter is uploaded to our servers.
Tips for formatting JSON
Pretty-print for reading; minify for compact payloads.
Validate syntax before committing formatted output.
Watch trailing commas — many JSON parsers reject them.
Keep large secrets out of shared formatted dumps.
Normalize indentation (2 or 4 spaces) for team diffs.
Pretty-print or minify JSON in the browser
Processing stays in your browser — your input is not uploaded to our servers.
A formatter rewrites JSON with consistent indentation so nested objects are readable, or strips whitespace when you need a compact payload.
Paste API responses, configs, or logs here when you are already in the browser. Invalid JSON surfaces a syntax error instead of silently “fixing” it.
Format JSON online
Paste the JSON
Copy from an API client, file, or DevTools and drop it in the input.
Format or minify
Pretty-print for reading; minify for compact request bodies or storage.
Fix syntax if needed
Quotes, commas, and brackets are the usual culprits. Correct them and run again, then copy the result.
JSON formatter FAQ
What is a JSON formatter?
It rewrites JSON with consistent whitespace. Minify does the opposite for smaller payloads.
Is my JSON uploaded?
No. Format and minify run in the browser on this page.
Does this validate a schema?
It checks that the text is valid JSON. Schema contracts belong in a separate validator or test suite.