JSON Formatter - Format & Validate JSON Online
Use the JSON formatter to turn compressed or messy JSON into readable, indented output and catch common syntax problems before debugging APIs.
Interactive tool
This tool runs in your browser. Enable JavaScript to use the interactive features.
Quick Guide
The formatter parses your JSON, reports invalid structure, and outputs a cleaner pretty-printed version that is easier to inspect, compare, and copy.
- Paste raw JSON from an API response, config file, or log.
- Run the formatter to validate syntax and beautify the structure.
- Copy the formatted JSON once errors are fixed.
Best for: Developers, QA testers, API users, and anyone cleaning JSON from logs, webhooks, or configuration files.
What this tool does
The formatter parses your JSON, reports invalid structure, and outputs a cleaner pretty-printed version that is easier to inspect, compare, and copy.
Useful examples
- Pretty print a minified API response before comparing fields.
- Find a missing comma, quote, brace, or bracket in malformed JSON.
- Clean JSON configuration before pasting it into a project or dashboard.
FAQs
Is a JSON formatter different from a JSON validator?
A formatter improves readability. A validator checks whether the JSON syntax is valid. This tool helps with both formatting and syntax checks.
What are common JSON syntax errors?
Common errors include trailing commas, missing quotes around keys, mismatched braces, missing commas between properties, and unescaped characters.