JSON Formatter & Validator
Format, prettify, and validate JSON online. Paste compact or messy JSON and get a nicely indented, readable result instantly.
This json formatter & validator helps you clean, convert, or validate structured data for debugging, imports, reports, and documentation. It supports JSON and structured text and is ideal for reading api responses copied from logs or browser tools, checking a config file before saving or deploying it and cleaning compact json for documentation or code review.
Unlike other tools, ConvertWiki focuses on speed, simplicity, and privacy. Your files are processed quickly and are not stored on any server.
You can use this tool for:
- Reading API responses copied from logs or browser tools
- Checking a config file before saving or deploying it
- Cleaning compact JSON for documentation or code review
How to use this tool:
- Upload your file or paste your content into the tool.
- The tool will automatically process it in your browser.
- Copy the result or download the output file.
Why use ConvertWiki?
Format JSON before debugging
Minified JSON is hard to review because objects, arrays, and nested fields all run together. Pretty printing adds indentation and line breaks so the structure is visible at a glance.
Validation is just as important as formatting. If the JSON has a missing comma, extra bracket, or invalid quote, the formatter stops and shows the error instead of giving you a misleading output.
Use it when
- Reading API responses copied from logs or browser tools.
- Checking a config file before saving or deploying it.
- Cleaning compact JSON for documentation or code review.
Frequently Asked Questions
Yes. If your JSON contains errors, the formatter will highlight the problem and explain what went wrong.
The output uses 2-space indentation by default, which is the most common convention for readable JSON.
No. JSON formatting is done entirely in your browser. Your data never leaves your device.
Yes, it is completely free with no signup required.