Code Tool
JSON Formatter & Validator
Paste JSON, validate it, format it for readability, minify it for compact payloads, then copy or download the result.
JSON input
Paste raw JSON, drop a file or load a sample to get started.
Choose a .json file. It is read locally in your browser.
Paste JSON to format, minify or validate it.
PrivacyYour JSON is processed in your browser and is not uploaded.
Output
Run format or minify to generate output.
Paste JSON, then choose Format JSON or Minify.
How to Use JSON Formatter & Validator
- Paste JSON into the input box or load a local JSON file.
- Choose whether to format, validate or minify the JSON.
- Use the status panel to find syntax errors and confirm valid JSON.
- Copy or download the cleaned JSON when the output looks right.
FAQ
Is my JSON uploaded?
No. The formatter runs in your browser, so the JSON you paste is processed locally on your device.
Can I validate JSON?
Yes. Invalid JSON shows an error message instead of formatted output, which helps you find syntax problems quickly.
Can I change the indentation?
Yes. You can format JSON with 2, 4 or 8 spaces depending on your project style.
Is there a file size limit?
There is no fixed site limit, but very large JSON can slow down your browser because formatting happens locally.