Format and validate JSON
Paste JSON to check its syntax, format it for reading, or minify it. Your input stays in this browser.
Format and validate JSON
Paste JSON and choose Format and validate to check its syntax and indent it. Use Minify for compact output. A syntax error is reported below the editor; the original input stays in place so you can fix it.
This tool parses standard JSON. It does not accept JavaScript comments or trailing commas. Processing happens in your browser; the page does not save the pasted value.
Need help fixing syntax?
Read the guide to common JSON errors.
Precision note: JavaScript numbers can round very large integers or high precision decimals during formatting. Keep a copy of the original when exact values matter.
Tip: press Ctrl+Enter (⌘+Enter on Mac) in an input to run the tool.