CompressFree
Guide

How to Format JSON Online

Turn compact or messy JSON into readable structured data.

Format JSON

JSON Formatter

Format messy JSON into readable indented output.

Start tool

Quick steps

  1. 01.Paste JSON.
  2. 02.Format or validate.
  3. 03.Copy the clean output.

Pretty-print for readability

Formatted JSON makes nested objects and arrays easier to scan and debug.

Validate before copying

If the JSON contains syntax errors, fix them before using the data in code or APIs.