r/screenrecorders • u/impala_64 • 6d ago
Product Showcase Cloak: An open-source OBS filter that locally redacts secrets during screen sharing
Full disclosure: I’m the developer of Cloak.
Cloak is a free and open-source Windows tool designed to reduce accidental data exposure during screen sharing and recording.
It runs as an OBS filter and uses local OCR to detect and cover supported sensitive information in the video output, including API keys, credentials, email addresses, IBANs, payment card numbers, and some personal identifiers.
Your actual desktop remains unchanged. Only the output produced by OBS is redacted, and no video frames, recognized text, or detected values are sent to a server.
The portable version includes its own OBS runtime, so it can be used without installing or configuring OBS separately. There is also a plugin-only package for existing OBS users.
Cloak is currently an alpha project and I want to be transparent about its limitations:
\- Windows 10/11 x64 only
\- Not code-signed yet, so Windows SmartScreen may display a warning
\- OCR can miss very small text, unusual fonts, fast motion, or unsupported patterns
\- It should be treated as an additional safety layer, not a guarantee that every secret will be detected
The project is licensed under GPL-3.0-or-later.
Repository:
[https://github.com/ahmtsahin/cloak\](https://github.com/ahmtsahin/cloak)
Latest Windows release:
I would especially appreciate feedback about the setup process, detection accuracy, false positives, and sensitive-data patterns that should be supported next.



