JSON Formatter & Beautifier

Indent:

JSON Input

Paste your JSON — any size, no limits

Formatted Output

Click "Format JSON" to see output

JSON Escape Characters

Common escapes in JSON strings: \" quote, \\ backslash, \n newline, \t tab, \uXXXX unicode. The formatter preserves all escape sequences as-is.

JSON Formatter

How to Use

  1. 1Paste your raw or minified JSON into the input area on the left.
  2. 2Select your preferred indent size (2 spaces, 4 spaces, or Tab) from the toolbar.
  3. 3Click 'Format JSON' to instantly pretty-print your JSON with proper indentation.
  4. 4Toggle 'Lines' to show line numbers in the output for easy reference.
  5. 5Toggle 'Dark' to switch the output panel to dark mode — great for presentations or readability.
  6. 6Use 'Minify' mode to compact your JSON into a single line for API payloads.
  7. 7Click 'Copy' to copy the result to clipboard, or '.json' to download as a file.

Practical Applications

1

API Response Debugging

Paste a minified API response and instantly see its structure in a readable, indented format with line numbers.

2

Config File Cleanup

Normalize inconsistently indented config files (package.json, tsconfig.json, appsettings.json) to a consistent style.

3

Code Review & Documentation

Use dark mode + line numbers to create clean screenshots of JSON data structures for docs or team reviews.

4

Large File Handling

The formatter handles JSON of any size — no character or file size limits. Ideal for large data exports or logs.

5

Minifying for Production

Switch to Minify mode to compact your JSON for smaller HTTP payloads before sending to an API or embedding in code.

Frequently Asked Questions

QWhat is JSON pretty printing?

Pretty printing (or beautifying) JSON means adding consistent indentation and newlines so the structure is easy for humans to read. Minified JSON is identical in data but compacted to one line for smaller file size.

QDoes the formatter support large JSON files?

Yes — there is no size limit. Paste in multi-megabyte JSON strings and the formatter will process them. For very large files (50MB+), the display may be slow on low-end devices due to browser rendering limits.

QWhat are JSON escape characters?

JSON strings use backslash escapes: \" for a quote, \\ for a backslash, \n for newline, \r for carriage return, \t for tab, \uXXXX for any Unicode codepoint. The formatter preserves all escape sequences exactly as written.

QIs the formatter free and private?

Yes, 100% free with no signup required. All processing runs entirely in your browser — your JSON is never sent to any server.

QCan I use this as a JSON beautifier and validator?

Yes. The formatter automatically validates your JSON as part of parsing. If your input contains a syntax error, an error message with the location and a fix hint is displayed before any formatting is attempted.