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JSON Validator, Prettifier & Minifier
Client-JS AST EngineValidate syntax errors, prettify indented JSON, compress minified payloads, and auto-generate TypeScript interface contracts—100% offline in your browser.
📖 How to Format, Validate & Compress JSON Step-by-Step
1
Paste JSON Input
Copy raw JSON text from your API, database export, or configuration file into the input area.
2
Select Operation
Choose between **Validate & Types**, **Prettify (Format)**, or **Compress (Minify)** depending on your goal.
3
Copy Clean Output
Review syntax validation, check byte size savings, and copy your formatted JSON or TypeScript types with one click.
❓ Frequently Asked Questions (FAQ)
Why should I use a client-side JSON tool instead of online converters?
Online JSON formatters often upload your data to remote servers, exposing private API keys, database credentials, or customer details. MY AI processes 100% of your JSON locally inside browser memory space with zero network transmissions.
How much bandwidth can JSON minification save?
Minifying JSON removes indentation, extra spaces, and newlines, typically reducing file size by 20% to 50%. This improves HTTP API response times and saves network bandwidth.
Does the tool highlight JSON syntax errors?
Yes! If your JSON contains missing quotes, trailing commas, or bracket mismatches, the tool instantly outputs the line position and exact parsing error message.