How to Format JSON Online: 5 Free Tools Compared

2026-07-07

How to Format JSON Online: 5 Free Tools Compared

Unformatted JSON is hard to read, debug, and share. These five free online JSON formatters make it easy to prettify, validate, and minify your data.

1. ToolGrid JSON Formatter

ToolGrid's [JSON formatter](/tools/developer/json/json-formatter/) formats, validates, and minifies JSON in one place. It runs locally, so sensitive data never leaves your machine.

2. JSONLint

A classic validator. Good for syntax checking but limited formatting options.

3. JSON Formatter by Curious Concept

Clean interface with tree view. Useful for exploring large documents.

4. Code Beautify

Supports many formats beyond JSON. Can feel cluttered with ads.

5. DuckDuckGo JSON Formatter

Handy for quick queries, but lacks export and validation features.

Quick tip

If your API returns compact JSON, paste it into ToolGrid, click "Pretty," and copy the formatted version directly into your docs or pull request.

[Format JSON now](/tools/developer/json/json-formatter/)