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YFT
Client-side ProcessingUpdated 2026-02-11Report issue

Runs fully in your browser. Inputs stay on your device. See recent fixes on changelog.

JSON Formatter & Validator

Format, validate, and minify JSON with syntax highlighting and error detection.

Cmd/Ctrl+Enter FormatCmd/Ctrl+Shift+M MinifyCmd/Ctrl+Shift+V ValidateCmd/Ctrl+Shift+C Copy
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Paste or type JSON to get started0 characters

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About JSON Formatter & Validator

Format, validate, and minify JSON with syntax highlighting and error detection. Format, validate, and minify JSON online for free. Syntax highlighting, error detection, configurable indentation. No signup. Everything runs client-side in your browser for maximum speed and privacy — no data is sent to any server, and no signup is required.

Related tools: Data Format Converter, Base64 Encode / Decode, Diff Checker

How to Use JSON Formatter & Validator

  1. Enter your input into the tool.
  2. The tool processes it instantly in your browser.
  3. Copy the result to your clipboard.

Frequently Asked Questions

What is JSON Formatter & Validator?
Format, validate, and minify JSON online for free. Syntax highlighting, error detection, configurable indentation. No signup.
Is JSON Formatter & Validator free to use?
Yes, it is completely free to use. It runs entirely in your browser with no signup, no account, and no usage limits.
Is my data safe when using JSON Formatter & Validator?
Yes. All processing happens locally in your browser. No data is uploaded to any server, so your information stays private and secure.