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CrateX.app

JSON Formatter

JSON Formatter

JSON Formatter: Format, validate, beautify, and minify JSON with real-time syntax checks, line-and-column error hints, key sorting, and custom indentation for API payloads, config files, logs, and debugging workflows.
JSON Formatter

Quick Start

1
Enter/Paste: type or paste JSON into the input area
2
Real-time validation: checks syntax as you type; errors show below with line/column
3
Format: click ‘Format’ to pretty-print and replace the input with the result
4
Minify: click ‘Minify’ to remove whitespace/newlines; replaces the input
5
Copy: click the copy button below to copy the current content

Common Scenarios

API debugging

quickly validate backend JSON and improve readability

Log inspection

format JSON snippets from logs to locate issues

Configuration

review structure, unify key order and indentation style

Code review

include clear JSON examples in PRs/docs

Pre-commit check

normalize JSON format/indentation before committing

Extended workflow

json minifier, json parser, and format json can be handled in the same review flow, so you can verify results before copying or exporting.

Formatting Parameters & Actions

Indent size: use the dropdown next to the buttons to choose Tab/2/4/8
Sort: click ‘Sort’ to alphabetically sort object keys (semantics unchanged); copy/submit uses current content

Usage Advice

Escapes: use valid escapes in strings (e.g., " and \ +)
Consistency: agree on indentation, key order, and schema within the team
Backup before sorting: sorting changes key order and cannot be auto-reverted; copy a backup first
Use ‘Line X, Column Y’ below the input and inspect around it
Minify then format to surface extra commas or mismatched quotes

Limitations & Compatibility

No comments: // and /* */ are not standard JSON (use JSON5/JSONC tools)
No single quotes: 'text' is not a valid JSON string
No trailing commas: {"a":1,} or [1,] is invalid
Large JSON: to keep the page responsive, consider splitting; very deep/huge structures may be simplified

Privacy & Security

All processing happens in your browser; data never leaves your device

FAQ

6

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