JSON Tool
Format, minify, escape and validate JSON. Line+column error locations when invalid. Runs entirely in your browser.
100% Private
Runs entirely in your browser
Instant
Real-time processing
No Limits
No character limits
0 characters
0 characters
Why Use JSON Tool?
Debug API Responses
Paste a one-line JSON blob from a log or curl and see it cleanly indented.
Validate Configs
Catch trailing commas and unquoted keys before they break a deploy.
Embed in Code
Escape JSON to drop into a string literal, or unescape it back to readable form.
About JSON Tool
JSON Tool covers the four operations you reach for daily — format, minify, escape and validate. Parsing uses the browser's native JSON engine, so it's strict about the spec: comments, trailing commas, single quotes and unquoted keys are all rejected.
When parsing fails, the error message includes the line and column where the issue was detected, so you can jump straight to the problem. For very large payloads, formatting a multi-megabyte file works but can take a moment — minifying is always fast.
Common Questions
Continue with
Tools that solve adjacent problems