BYTETOOLS

JSON Formatter

Format, beautify and minify JSON online with 2-space, 4-space or tab indentation. Sort keys alphabetically and catch syntax errors instantly — free and private.

What is the JSON Formatter?

The ByteTools JSON Formatter pretty-prints raw or minified JSON into a clean, indented structure you can actually read.

  • Beautify JSON with 2-space, 4-space or tab indentation
  • One-click minify for compact production JSON
  • Recursive alphabetical key sorting
  • Parse errors reported with line and column position
  • Copy or download the formatted output
  • 100% client-side — JSON never leaves your browser

How to use the JSON Formatter

  1. 1

    Paste your raw or minified JSON into the input box.

  2. 2

    Pick an indentation style (2 spaces, 4 spaces or tab) and optionally tick Sort keys alphabetically.

  3. 3

    Click Format to beautify, or Minify to compress everything onto one line.

  4. 4

    Fix any syntax error using the line and column shown in the error message.

  5. 5

    Copy the result or download it as a .json file.

About the JSON Formatter

The ByteTools JSON Formatter pretty-prints raw or minified JSON into a clean, indented structure you can actually read. Choose 2-space, 4-space or tab indentation, optionally sort object keys alphabetically (recursively through nested objects), or switch to Minify to compress the JSON back onto a single line for production payloads.

It is built for developers debugging API responses, configuration files, log entries and webhook payloads. If the input is not valid JSON, the formatter shows the exact parser error with the line and column where parsing failed, so you can fix a missing comma or stray quote in seconds.

Everything runs 100% locally in your browser using the native JSON parser — your data is never uploaded to any server, which makes it safe for API keys, customer records and other sensitive payloads.

Frequently asked questions

How do I format JSON online?

Paste your JSON into the input box, choose an indentation style and click Format. The tool parses the text with the browser's native JSON engine and re-prints it with consistent indentation, so even deeply nested API responses become readable instantly.

Does formatting JSON change the data?

No. Formatting only changes whitespace and, if you enable key sorting, the order of object keys. Values, nesting and array order stay exactly the same, and JSON parsers ignore both whitespace and key order, so the data is semantically identical.

What is the difference between beautify and minify?

Beautify adds line breaks and indentation so humans can read the structure, while minify removes all optional whitespace so the file is as small as possible. Use beautified JSON for debugging and code review, and minified JSON for API payloads and production configs.

Why does my JSON fail to parse?

The most common causes are trailing commas, single quotes instead of double quotes, unquoted keys and comments — none of which are allowed in strict JSON. The error message shows the line and column where the parser stopped, which is usually right after the problem character.

Is it safe to paste sensitive JSON here?

Yes. The formatter runs entirely in your browser with JavaScript — nothing is transmitted, logged or stored on any server. You can even load the page and then go offline before pasting confidential data.

Can I sort JSON keys alphabetically?

Yes. Tick 'Sort keys alphabetically' before formatting and every object, including nested ones, is re-printed with its keys in A–Z order. This makes diffs between two JSON files much easier to compare.

Guides for JSON Formatter

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