Auto-formats JSON responses in Chrome. Clean tree view, syntax highlighting, themes. All processing happens locally โ your data never leaves your browser.
Pro features available at $2/mo ยท No subscription required for basic formatting
โผ {
"users": [
โผ {
"id": 1,
"name": "Alice",
"verified": true
}
]
}Many developers want a transparent, independently-operated JSON viewer with minimum permissions and zero telemetry. JSONClean is built from scratch on Manifest V3 with that exact goal.
Open any .json file or API response โ JSONClean turns it into a clean tree instantly.
Click to fold/expand any node. Stay focused on what matters.
Syncs with your system, or pick your favorite manually.
Copy raw or pretty-printed JSON without thinking.
All JSON parsing happens in your browser. Zero network calls from the extension.
Filter by keys, values, regex. Run JSONPath queries. Local schema inference, diff view, data anonymization, format conversion. All 100% local. $2/mo.
How JSONClean compares to typical JSON viewing extensions.
| Feature | JSONClean | Typical alternatives |
|---|---|---|
| Manifest V3 | โ | Often MV2 |
| Telemetry / Analytics | โ None | Often present |
| Remote code execution | โ Never | Varies |
| Permission count | 1 | Often more |
| Operator | Independent solo developer | Varies |
No. All parsing happens in your browser. The extension makes zero network requests. The only data stored is your local settings.
A small paid tier ($2/mo) lets the project stay independently operated by a single developer โ no investor pressure, no acquisition risk. Basic formatting stays free forever.
No. All Pro features run 100% locally in your browser, just like the free tier. Search, JSONPath queries, schema inference, diff view, data anonymization, format conversion โ none of these require sending your JSON anywhere. The privacy story doesn't change when you upgrade.
JSONClean is built from scratch on Manifest V3 with minimum permissions (storage only), zero network calls, and no remote code. It is operated by a single independent developer โ keeping decisions fast and aligned with users, not investors.
Currently proprietary to allow rapid iteration. Transparency is delivered through minimum permissions (verifiable in the manifest) and zero network calls (verifiable via DevTools). Open source release is on the roadmap.
No. JSONClean is intended to remain independently operated. If the operator ever stops maintaining it, the source will be released under an open license rather than sold to a new owner.
Free forever for basic formatting. Pro features at $2/mo.
Add to Chrome โ FreeWeb Store link coming soon.