JSON Formatter and Validator
Paste JSON, format it, and validate syntax
JSON Minify
Minify JSON by removing unnecessary whitespace
0 chars
0 chars
JSON Compare
Compare differences between two JSON documents
JSON β YAML β XML Convert
Convert between JSON, YAML, and XML
What is JSON Toolbox?
A private JSON toolbox for formatting, validating, minifying, comparing, and converting JSON. The tool works in the browser and does not upload your data.
Key Features
- Format and beautify JSON
- Validate JSON syntax
- Minify JSON to reduce size
- Compare two JSON documents
- Convert JSON to YAML and XML
- Convert YAML or XML back to JSON
Common Use Cases
- Debug API responses
- Clean up configuration files
- Compare two JSON payloads
- Convert data between JSON, YAML, and XML
Example workflow
- Paste a representative JSON sample into the editor.
- Use validation first to catch missing commas, invalid quotes, or broken nesting.
- Format the JSON for review, then minify it when you need a compact payload.
- Convert or compare only after the source JSON is valid.
Safe use tips
- Remove API keys, access tokens, customer records, and production secrets before testing.
- Use small samples when debugging third-party payloads so the structure is clear.
- Keep a copy of the original data when testing formatting or conversion changes.
Frequently Asked Questions
Is the JSON formatter free?
Yes. JSON Toolbox is free to use and does not require an account.
Does my JSON get uploaded?
No. Formatting, validation, comparison, and conversion happen locally in your browser.
Which conversions are supported?
The tool supports JSON formatting, minifying, comparing, JSON to YAML, YAML to JSON, JSON to XML, and XML to JSON.
How large can a JSON file be?
The practical limit depends on browser memory. For a smooth experience, files below about 50 MB are recommended.