LogoSeaOtter Tools

JSON Formatter & Validator

Format, minify and validate JSON data locally in your browser.

Find
Replace With
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JSON Input (Source Editor)Chars: 241
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⋮⋮root:
Object {4}
⋮⋮appName:
"SeaOtter Tools"
⋮⋮version:
"2.5.0"
⋮⋮settings:
Object {3}
⋮⋮theme:
"light"
⋮⋮sandbox:
true
⋮⋮features:
Array [2]
⋮⋮0:
"json-parser"
⋮⋮1:
"base64-codec"
⋮⋮stats:
Object {2}
⋮⋮users:
10500
⋮⋮rating:
4.9

How to Use JSON Formatter

1

Paste or enter your raw JSON data into the left input editor, or click the folder icon to import a local .json file.

2

Click 'Format' to beautify your JSON with proper indentation, or click 'Minify' to compress it into a single line.

3

The tool will parse the input and display interactive 'Tree' and 'Form' views in the right panel. Double-click values in Form view to edit them directly.

4

Click 'Copy' to copy the formatted result, or use the XML, CSV, and YAML buttons at the top to export to other structured formats.

JSON Formatter FAQ

Is my JSON data safe? Will it be uploaded to the server?
Absolutely. All processing and parsing of your JSON data are executed strictly within your browser. Your data never leaves your device and is never uploaded to any server.
What happens if there is a syntax error in my JSON?
If your JSON data is invalid, the error message and the exact line number of the syntax error will be displayed in red at the top of the right panel, helping you locate the issue instantly.
What are the Tree and Form views used for?
The Tree view lets you collapse and expand JSON nodes to inspect deep data structures. The Form view flattens all key-value pairs, letting you edit any property and sync it back to the text editor.

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