What errors does it catch?

Syntax errors, missing quotes, trailing commas, and more.

It identifies errors but cannot auto-fix them.

Is there a size limit?

Limited by browser memory, typically handles large files well.

JSON Syntax Validator

JSON Syntax Validator Overview

Check JSON for syntax errors and format it.

The JSON Validator is a must-have tool for debugging and formatting JSON data. JSON (JavaScript Object Notation) is the language of the web, but a single missing comma or quote can break an entire application. This tool scans your JSON string for syntax errors and pinpoints the exact line number of the issue. Beyond validation, it acts as a "Prettifier" to format messy, minified JSON into a readable, indented structure, or a "Minifier" to compress it for production use.

How to Use JSON Syntax Validator

Paste JSON
Click validate
View errors or success
Format or minify

Frequently Asked Questions

What errors does it catch?: Syntax errors, missing quotes, trailing commas, and more.
Can it fix errors?: It identifies errors but cannot auto-fix them.
Is there a size limit?: Limited by browser memory, typically handles large files well.

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