Is the Formalint JSON formatter private?

The static Formalint formatter processes JSON in the browser. The current version does not upload pasted JSON to a server.

Can Formalint validate invalid JSON?

Formalint parses JSON with the browser runtime and reports validation errors so developers can fix malformed input.

Does Formalint support minified JSON?

Yes. Formalint can minify valid JSON and can also reformat minified JSON into readable indentation.

Browser-based developer tools

JSON Formatter

Beautify, validate, minify and inspect JSON without sending input to a backend.

Open XML tool

Input

0 bytes

Result

Ready

XML Formatter Validate and convert XML Regex Tester Coming next SQL to NoSQL Planned

Reference notes

Clean JSON for everyday development

Local-first by default

Formalint keeps formatting work inside the browser for this static release. That makes it suitable for API payloads, sample responses, configuration drafts and quick debugging sessions.

Readable structure

The tree view helps compare objects, arrays, keys, values and nesting depth when a raw API response is too dense to scan comfortably.

Search-friendly utility

This page is intentionally focused on one developer task, with fast loading, no external UI libraries and clear navigation to related tools.