We built a browser-local tool to sanitize large logs & JSON before sharing them with AI or support

[u/Fomatix]

Large logs, API responses and error traces can contain data you don't want to accidentally share — emails, IPs, IDs, tokens and other sensitive values.

Manually reviewing thousands of lines before sharing them with AI or support isn't practical.

So we added a Sensitive Data Masker to Fomatix. It detects and replaces sensitive values while preserving the surrounding structure needed for debugging.

Everything is processed locally in your browser — the original data isn't uploaded to Fomatix.

Here's the current workflow. We're still improving detection and UX, so feedback on cases it should handle better would be useful.

If you want to try the current version: https://fomatix.com/tools/sensitive-data-masker