Mask This is described as 'MacOS menu bar application that uses Apple Intelligence to automatically detect and mask sensitive information in your clipboard in real-time' and is a Privacy Tool in the security & privacy category. There are three alternatives to Mask This for a variety of platforms, including Google Chrome, Mac, Linux, Arch Linux and Jira apps. The best Mask This alternative is Velum Privacy, which is free. Other great apps like Mask This are MaskPaste and SafePaste AI.
Masks personal data in text and files before it reaches ChatGPT, Claude or any AI, then restores it in the reply, running entirely on your own device.
MaskPaste lets you mask sensitive details on your device, without sending or saving your text or replacement rules to any external server, before you paste into AI.
Automatically mask sensitive data (API keys, PII) locally before pasting into AI chatbots like ChatGPT and Gemini.
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