⚡ CLIENT-SIDE · VALIDATOR · 100% PRIVATE
JSON Formatter
Format, validate, and minify JSON strings instantly. Detailed line-by-line syntax error parsing with helpful suggestions. 100% local.
Instructions: Paste your JSON payload into the input panel, choose formatting indentation rules, and pretty print or minify.
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01
Paste JSON String
Paste minified, messy, or broken JSON text blocks into the text box.
02
Validate & Format
The parser validates quotes, commas, brackets, and prettifies layouts using indent rules.
03
Save / Copy Output
Copy formatted results or download them. Zero net transmission, safe and secure.
Why Use JSON Formatter?
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Verbose Syntax Errors: Locates missing commas or unquoted keys with line and column labels.
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Indent Control: Select 2, 4, or 8 space tab options for formatting preferences.
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Keys Sorting: Sort keys alphabetically to optimize git comparisons.
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Minify Mode: Remove spacing to minimize payload sizes for network traffic.
Frequently Asked Questions
Why is my JSON showing invalid?
Common causes are single quotes instead of double quotes, trailing commas, or missing quotes around keys.
Is formatting secure?
Yes. Processing is client-side inside the browser in-memory space. No data is stored.
What is JSON minification?
It strips whitespace and newlines, reducing size for storage or transmission.