JSON Beautifier & Validator
Paste your JSON to validate it instantly and pretty-print it the way you like — choose your indentation, sort keys, minify, or explore the document as a collapsible tree. Everything runs in your browser; nothing is uploaded.
Your JSON
Your formatted JSON will appear here as you type.
What you can do
- Validate. Live, strict validation with the exact line and column of the first syntax error.
- Beautify. Pretty-print with 2 spaces, 4 spaces or tabs, with syntax highlighting.
- Minify. Strip every unnecessary byte and see how much you saved.
- Sort keys. Alphabetise object keys recursively to make two payloads easy to diff.
- Explore. Browse deeply nested payloads as a collapsible tree.
- Load & save. Drop a
.jsonfile in, copy the result, or download it back out.
Frequently asked questions
Is my JSON uploaded anywhere?
No. Parsing, formatting and validation all happen in your browser using the native JSON engine. Nothing you paste is sent to AgileTechForge or any third party.
What does the validator check?
It runs a strict JSON parse, so trailing commas, single-quoted strings, unquoted keys, comments and NaN/Infinity are all reported as errors. When something fails you get the exact line, column and character offset, plus a "Jump to error" button.
Can it handle large files?
Yes — you can paste or drop files up to 5 MB. Syntax highlighting and the tree view switch off for very large documents so typing stays responsive; formatting and validation keep working.
Why did my very large numbers change?
JSON is re-serialised through JavaScript, so integers beyond 2^53 and some high-precision decimals are rounded, and duplicate keys collapse to the last one. That is standard JSON parsing behaviour, not a bug in the tool.
Need more than a formatter?
AgileTechForge builds web platforms, mobile apps and ERP systems for teams across Pakistan and worldwide.
Talk to our team