JSON Formatter
Pretty-print JSON with clear indentation. Paste or drop a file — formatting stays on your device.
Drop a file or paste below
JSON files stay in your browser
How to use this tool
Paste or drop JSON
Load a .json file or paste into the editor.
Format
Indentation and structure are normalized locally.
Copy or download
Take the pretty-printed JSON wherever you need it.
Why format JSON in the browser
Readable indentation makes APIs, configs, and debug payloads easier to review. Format Convertly parses and re-serializes JSON locally so sensitive tokens never cross the network.
What you get
Valid JSON is rewritten with consistent spacing. Invalid JSON returns a clear parse error so you can fix it before shipping.
When to use a formatter vs minifier
Format for humans and code review. Minify when you need the smallest payload for transport or embedding.
Frequently Asked Questions
More on quality loss: conversion quality guides · compression guides
Is my file uploaded?
No. Format Convertly tools run in your browser tab. Files are not sent to our servers for processing.
Is this tool free?
Yes. Use it without an account or watermark.
Does it work on mobile?
Yes — any modern phone or desktop browser that supports the required Web APIs.
Does formatting change values?
No. Structure and values stay the same — only whitespace from JSON.stringify is applied.
Ready to convert more formats?
Browse converters or jump back to the tool above.