Paste your JSON
Drop the raw text from an API response, config file, or log payload directly into the input field.
Free, privacy-first
JSON Validator: Syntax, Format and Minify
Check whether JSON is valid, jump to the exact syntax error, repair common issues, and format or minify the same payload locally.
Inputs
Results
Results update as you use the interface above.
How to Use This JSON Validator
Paste your JSON, validate it, apply quick cleanup for common issues if needed, then format or minify the same text.
Run validation
Click Validate to check the syntax. If there is an error, the tool reports the exact line and column so you can jump to the problem without scanning the whole document.
Repair common issues if needed
Use the Repair action to fix smart quotes, curly quotes, byte-order marks, and trailing commas automatically before retrying validation.
Format or minify the result
Once the payload is valid, format it with two-space indentation for readability, or minify it into a compact single-line string ready for transport or storage.