Cloakpaste

Hides emails, keys, card numbers and names before you paste into AI chats. Runs fully on-device.

Cloakpaste keeps private data out of AI chats. Paste a stack trace, an email thread or a config file into an AI chat, and Cloakpaste swaps the sensitive parts for placeholders before the text lands in the message box: Hi Priya Raman, reach me at arjun@northwind.dev becomes Hi [PERSON_1], reach me at [EMAIL_1] When the AI replies with a placeholder, hover it to see the original, or copy the reply to get the real values back on your clipboard. WHAT IT HIDES • API keys and access tokens in the formats used by major cloud, developer, payment and AI services • Passwords and secrets in config files and connection strings • Private keys • Card numbers and IBANs, checked with checksums • Indian Aadhaar and PAN numbers, and US Social Security numbers • Email addresses, phone numbers, IP and MAC addresses • People's names, places and street addresses, found by a small on-device model • Your own words: client names, project codenames PRIVATE BY DESIGN • Everything runs in your browser. The detection model ships with the extension, and no network requests are made. • No account, no server, no analytics, no tracking. • Placeholder mappings are kept in memory only and cleared when you close the browser. • Originals are shown in the extension's own tooltip, so the chat site's scripts never see them. IN YOUR CONTROL • "Paste original" undoes any redaction. • Switch each kind of data on or off, or switch off individual sites. • Try anything in the built-in playground. WHERE IT WORKS Popular AI chat sites such as ChatGPT, Claude and Gemini are protected out of the box; the full list is on the settings page. To cover any other site, such as a self-hosted chat UI, open it and choose "Protect this site". Only pasted text is checked. Text you type yourself and files you upload are not. The extension reduces accidental leaks; no detector catches everything. ChatGPT, Claude and Gemini are trademarks of their respective owners. Cloakpaste is not affiliated with or endorsed by them. Source code: https://github.com/Dhiva-Labs/Cloakpaste