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JSON Formatter

Format and beautify JSON data with proper indentation.

How to Use JSON Formatter

1

Paste your JSON into the input box, either by typing it directly or by loading a .json file from disk.

2

Choose an indentation style from the options: 2 spaces, 4 spaces, or a tab character.

3

Click the "Process" button to validate and beautify the JSON with that indentation.

4

Copy the formatted output using the one-click copy button, or download it as a .json file.

Features

Strict JSON parsing that reports errors instead of guessing at broken input
Indentation options for 2 spaces, 4 spaces, or a literal tab character
Preserves key order exactly as you sent it, with no sorting applied
One-click copy plus a .json download for build and deployment scripts
Runs in your browser, so private API payloads are never transmitted
Handles large documents with deeply nested objects and arrays

Frequently Asked Questions

Yes, it is completely free and no account is required. There is no trial tier, no daily cap, and nothing is watermarked on the output.
No. The tool decodes the JSON into a structure and encodes it again with different whitespace, so values, key order, numbers, and nulls are preserved. Whitespace outside of string values is not meaningful in JSON, so the formatted document parses identically to the original.
No. Formatting happens entirely in your browser, so the contents of a customer export or an internal API response are never transmitted or logged. You can go offline after the page loads and it still works.
It is a style preference, but 2 spaces is most common in JavaScript projects and 4 spaces fits PHP and Python codebases. Tabs are the safest pick when your team follows an editorconfig, because each developer sets their own visual width.

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About JSON Formatter

Raw JSON arrives in every shape imaginable. A curl response prints on one enormous line, a log file has every key crammed together, and a payload exported from a database blob is unreadable by eye. The JSON Formatter takes that tangled text and re-serializes it with consistent indentation, so every object, array, and key sits on its own line at a predictable depth.

Under the hood it parses your input with a strict JSON parser first. If parsing fails you get an error instead of a half-broken result, which matters when you are staring at a response that is misbehaving in production. Once the structure is valid, the tool re-encodes it with your chosen indent width, which is why 4 spaces stays 4 spaces and nested arrays line up under their parent key.

Because the output is regenerated from a parsed tree rather than patched textually, formatting never alters your data. Unicode characters, escaped slashes, numeric values, and nulls all survive the round trip, and the pretty version is byte-for-byte equivalent to the original when you minify it again.

When to Use This Tool

  • Reading a minified API response from a browser network tab or a REST client
  • Diffing two JSON payloads where the only change is a single nested value
  • Cleaning up fixtures or seed data before committing it to a repository
  • Inspecting deep webhook bodies from payment, commerce, or repository providers
  • Pasting JSON into a bug report or forum question so other people can read it