Does this tool send my JSON to a server?

No. Formatting and validation happen entirely in your browser.

JSON Formatter & Validator

Processed in your browser

Format, validate, and minify JSON. Tree view with syntax error highlighting.

JSON input

Format, validate, and minify JSON. Tree view with syntax error highlighting.

How to Format and Validate JSON Online
Quickly beautify, minify, and validate JSON without installing tools or uploading data to a server.

Calculate profit, margin, and markup from revenue and cost. Includes reverse calculation.

Compress JPG, PNG, WebP, and AVIF images in your browser. Batch processing supported.