Format JSON Online Without Uploading Files
Overview
Most JSON formatters send your data to a remote server for processing. PDF Mavericks runs entirely in your browser: paste your JSON, hit format, and get readable output without a single byte leaving your device. Useful when working with API keys, credentials, or proprietary data structures you cannot expose.
How to Use This Tool
Paste your raw JSON into the input panel and click Format. The tool instantly applies 2-space indentation and syntax highlighting. Copy the output or download it as a .json file.
Ready to get started? It's free, no registration required, and your files never leave your device.
PDF Tool →Frequently Asked Questions
Is my JSON data sent to any server?
No. The formatter runs as JavaScript in your browser. Your JSON never leaves your device, which matters when the payload contains API keys, tokens, or private records.
What is the maximum JSON size this tool handles?
The browser-based formatter handles files up to several MB comfortably. Very large files (50MB+) may slow down depending on your device RAM.
Can I format minified JSON with this tool?
Yes. Paste any valid minified JSON string and the formatter expands it into properly indented, human-readable form immediately.