JSON Formatter

Paste your JSON below — we'll format, minify, and syntax-check it for you!

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輸入 JSON
0 Invalid JSON
格式化結果

                
0 Indent 2
📋
Step 1
Paste JSON into the left editor, or click "Load File" to upload a .json file.
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Step 2
Choose indent size (2 or 4), or click "Minify" to remove all extra whitespace and line breaks.
Step 3
See syntax-highlighted output on the right instantly, then click "Copy" or "Download".
What is the difference between JSON formatting and JSON beautifying?
They mean the same thing. Formatting (or pretty-printing) adds indentation and line breaks to minified JSON so the structure is easier to read. This tool supports both beautifying and minifying.
Why does my JSON show a format error?
Common causes include trailing commas, single quotes instead of double quotes, and keys without quotes. Error details help you locate the exact issue quickly.
Can this handle large JSON files?
Yes. We recommend files within 10MB for smooth use. Larger files may cause temporary lag on lower-end devices, but the data itself is still valid.
Is my data safe? Is it stored or analyzed?
Your data is processed in your browser. Our server does not receive, store, or analyze the JSON you enter.
What is the purpose of "Sort Keys"?
It sorts object keys alphabetically so two JSON files are easier to compare and output is more consistent, reducing noisy diffs in version control.
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