Dev & Design
JSON Formatter & Validator
Format, validate and explore JSON.
Output will appear here
How it works
JSON is validated using native JSON.parse() in your browser — nothing is sent to a server.
7 ways developers use this
Debug API responses
Paste raw response, spot the malformed field instantly
Validate config files
Catch missing commas before shipping to production
Minify for production
Shrink payload before embedding in code
Explore nested data
Expand only the branch you care about
Copy JSON paths
Grab dot-notation paths for code without counting brackets
Format before committing
Clean up messy copy-pasted JSON
Share readable JSON
Send formatted snippets to teammates
How it works▾
JSON is validated using native JSON.parse() in your browser — nothing is sent to a server.
7 ways developers use this
Debug API responses
Paste raw response, spot the malformed field instantly
Validate config files
Catch missing commas before shipping to production
Minify for production
Shrink payload before embedding in code
Explore nested data
Expand only the branch you care about
Copy JSON paths
Grab dot-notation paths for code without counting brackets
Format before committing
Clean up messy copy-pasted JSON
Share readable JSON
Send formatted snippets to teammates
Frequently asked questions
Format, validate, and explore JSON instantly. Useful when debugging API responses, cleaning up config files, or sharing readable data with teammates.
- What does the JSON formatter do?
- It pretty-prints JSON with consistent indentation, validates the syntax, and lets you collapse or expand branches in the tree view to navigate large payloads.
- Will it tell me where my JSON is broken?
- Yes. Invalid input shows the parser's error message including the position of the first problem, so you can jump to the broken comma or quote.
- Is my JSON sent to a server?
- No. Validation runs through the browser's native JSON.parse() — your data never leaves the page.