Can it handle large JSON files?

Up to ~10 MB comfortably in the browser. Beyond that you'll want a CLI tool.

Does it show error locations?

Yes. Invalid JSON shows the exact line and column.

JSON Formatter

Paste JSON to format or minify it.

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A fast, reliable JSON tool that does three things at once: pretty-prints with configurable indent, validates and shows the exact error line if invalid, and minifies for compact output.

Useful for inspecting API responses, cleaning up config files, or compressing JSON for embedding.

Frequently asked questions

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