Beautify, validate, and minify JSON strings with pinpoint syntax error reporting and clear line/column indications.
How to Use This Tool
- Paste your code, payload, schema, or query into the source editor.
- Choose indentation spacing (2 or 4 spaces), formatting flags, or conversion mode.
- Inspect syntax validation or decoded output in real time, then click Copy Code or Download.
Supported Formats, Boundaries & Privacy
Inputs & Boundaries: Executes locally within your browser sandbox without external network compiler or relay dependencies.
Local Client-Side Processing: Tool computations and file operations execute 100% locally within your browser sandbox via JavaScript and HTML5 Web APIs. Your input values, uploaded files, and computed results are never transmitted to our web servers. General site access, analytics, and advertising cookies are managed transparently under our Privacy Policy and Cookie Policy.
Frequently Asked Questions
How does the validator pinpoint JSON syntax errors?
The parser identifies the exact character position and line number where JSON syntax broke, with helpful error descriptions.
Can I format minified or single-line JSON?
Yes. Paste any valid JSON and click Format to beautify with 2-space or 4-space indentation.