I Built a Free JSON Formatter (Because Postman's Web UI is Clunky)

Description and use

A free, browser‑based JSON formatter that runs offline, requires no account, and never uploads data, solving privacy and usability issues.

Problem

Postman's web UI requires an account and uploads JSON to a remote server, posing privacy concerns and usability issues for simple formatting tasks.

Outcome

The tool provides a free, private, offline-capable JSON formatting experience, eliminating the need for accounts or server uploads.

Workflow

• Open the web tool at https://tools.jackgreen.top/app-c6b21fb4992d/
• Paste raw JSON or drag-and-drop a .json file
• Click "Format" to pretty-print with chosen indentation
• Click "Validate" to check syntax with error locations
• Click "Minify" to collapse to a single line
• Use one-click copy to clipboard
• Toggle dark/light theme as needed
• Work offline after first load

Evidence

JSON Formatter & Validator runs 100% in your browser. No uploads. No accounts. No subscriptions.

Source