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CSV to JSON Converter
Convert spreadsheet CSV data to JSON format instantly.
JSON Formatter & Validator
JSON Formatter & Validator — Beautify JSON Online
Format, validate, and minify JSON online. Instant results, no data sent to servers.
Indent:
Input JSON
Output
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Quick Start Instructions
Paste messy or minified JSON to beautify it with 2-space, 4-space, or tab indentation. Validates syntax and shows the exact error line. Also minifies JSON.
- 1Paste unformatted, minified, or messy JSON text.
- 2Choose indentation spacing (2 spaces, 4 spaces, or tabs).
- 3Click format to beautify the code payload.
- 4Spot and fix syntax errors highlighted by the integrated editor.
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Frequently Asked Questions
Why is my JSON showing a syntax error on line 1?
Common issues include trailing commas, single quotes, or missing brackets.
Can I minify a large JSON payload instead of beautifying it?
Yes, switch to minify mode to strip whitespace.
Does the formatter sort object keys alphabetically?
There is an optional feature to organize large API responses.
How large of a JSON payload can I realistically format?
It handles multi-megabyte files depending on browser capabilities.
Are comments allowed in standard JSON?
No, but the formatter can auto-strip trailing comments if needed.
Detailed Guide & Overview
Format and Beautify JSON Instantly
Dealing with minified, unformatted JSON data from API responses or log files can be a nightmare to read and debug. Our free online JSON formatter instantly parses your raw, compressed string and beautifies it with proper indentation, color coding, and collapsible syntax trees. It turns an unreadable wall of text into structured, human-readable data.
Built-in Validation and Error Detection
A single missing comma or unmatched bracket can break your entire application. This tool acts as a strict JSON validator. If your input contains syntax errors, it immediately highlights the exact line and character where the parsing failed, helping you fix the issue in seconds rather than spending hours debugging your code.
Secure Browser-Based Processing
JSON payloads often contain sensitive user data, API keys, and proprietary application configurations. We prioritize your data security by executing all formatting and validation locally in your browser. Your JSON data is never transmitted to our servers, ensuring total privacy for your development workflow.