JSON Formatter / Validator

Beautify, validate, or minify JSON instantly. 100% Client-Side. Zero tracking.

Raw JSON Input

Formatted JSON Output

Input: 0 chars Output: 0 chars

🔒 PRIVACY NOTE: Your files are processed entirely within your web browser. We do not upload, store, or share your data with any servers. 100% secure and private.

How it works

A fast, local, and developer-friendly JSON cleanup tool.

Input JSON

Paste your raw JSON or switch to File Upload mode to load a .json file directly from your device.

Format or Minify

Beautify your JSON for readability or minify it for compact output, with instant validation as you work.

Copy or Download

Copy the cleaned result or download it as a ready-to-use JSON file. Everything runs locally in your browser.

The Difference

Format vs. Minify

Formatting adds indentation and spacing so JSON is easier for humans to read and debug. Minifying removes extra whitespace to reduce size for transport or embedding in apps and APIs.

Security First

Why validate locally?

JSON often contains internal payloads, API responses, config files, analytics events, or user data. File Gulp validates and transforms everything entirely inside your browser memory using JavaScript, ensuring zero exposure to external servers.

What this tool helps with

Instant Validation: Detects malformed JSON immediately and blocks invalid downloads so you always export clean data.
Readable Output: Supports pretty-print formatting with 2-space or 4-space indentation for developer workflows.
Compact Output: Switch to minify mode whenever you need one-line JSON for transport, storage, or embedding.
Safe Downloads: Generated files keep the original uploaded name when available and append -FileGulp automatically.