JSON Formatter & Validator

Paste JSON to format, validate, or minify it.

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Online JSON Formatter — Format, Validate, and Minify

Quick guide

Unix Timestamps Explained: Epoch Time to Date and Back

What a Unix timestamp is, why it starts in 1970, seconds versus milliseconds, time zones, and the 2038 problem. Convert epoch time free in your browser.

CSV vs JSON: When to Use Each Format (and How to Convert)

CSV and JSON solve different problems. Learn which fits your data, where each breaks down, and how to convert between them without losing information.

How to Test a Regex Online Before You Ship It

A regex that looks right can still match too much, too little, or hang. Test it against real inputs in your browser before it reaches production.

Why Minified JSON Is Hard to Debug (and How to Fix It)

Minified JSON is great for machines and painful for people. Learn to format, validate and minify JSON, and spot the usual syntax errors fast.

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