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JSON Formatter

A free browser tool that formats, validates and minifies JSON. Paste any snippet and see at once whether it is valid and where it breaks.

Web toolBachelor +2CC BY 4.0
Open the tool

What you will learn

  • Check whether a snippet is valid JSON
  • Read nested JSON once it is formatted

What it does

  • Formats JSON with indentation so nested objects and arrays become readable.

  • Says whether the text is valid JSON, and where it breaks if it is not.

  • Minifies it back to one line.

It runs in the browser: what you paste is not uploaded, and no account is needed.

Ideas for class

  • Paste the snippets from the JSON basics exercise and let the tool confirm each answer.

  • Open a public API response (for example an open data portal) and let learners find one value in the formatted result.

The tool is free to use. This description is licensed under CC BY 4.0.

Reuse this material

CC BY 4.0

You may copy, adapt and share it, also commercially, as long as you credit ManyPI and link back.

"JSON Formatter" by ManyPI (https://manypi.com/edu/json-formatter), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

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