Privacy Mask: Hide Sensitive & Personal Info (PII) by PaperWork

Privacy Mask hides personal and sensitive information in your text before it reaches an AI chat. It runs on your own computer. No tracking, and detection never sends your text anywhere. Start on the Free plan with no account, or go Pro for unlimited hides and files. You stay in charge the whole time. Privacy Mask never sends a prompt for you and never changes your text silently. It shows you what it found, lets you choose what to hide, and waits for you to insert the masked text and press enter yourself. HOW IT WORKS Write or paste your prompt the way you normally would. Open the Privacy Mask panel and it scans the text right away, on your device. You get three things side by side: the original, a masked preview, and a list of every item it detected. Turn individual items on or off if it caught something you want to keep, or missed something you want to add. When the preview looks right, insert the masked version into the chat box. Each piece of sensitive data becomes a short placeholder, such as [EMAIL_1], [NAME_2], or [PHONE_1]. The link between a placeholder and its real value lives only in your current browser session. So when the AI replies, you can paste the answer back and Privacy Mask restores the real values locally, which keeps the reply readable for you. Close the session and that link is gone. PLANS Privacy Mask comes in two plans. Detection works the same way in both, locally in your browser; the plans differ only in how much you can hide each week. Free: 200 hides and 10 files per week, no sign-in needed. The counter lives in your browser and starts over seven days after the first hide. Pro: unlimited hides and files. $9 per month or $60 per year, cancel any time from Manage subscription. Pro needs a Google sign-in so the plan follows you between computers. Stripe takes the payment, so no card details reach PaperWork. Signing in sends only your account email and plan status to PaperWork's account service, never anything you hide. WHERE IT WORKS Privacy Mask adds a quick privacy step to the major AI chat assistants you already use. The full list of sites it runs on is shown in the permissions on this page, so you can check it before installing. It activates only on those sites and stays completely inactive everywhere else. On your bank, your email, or any other page, the extension does nothing at all. The document and text editors are separate. They open in their own extension tab, work with no AI chat involved, and need no network connection at all. WHAT IT DETECTS Privacy Mask looks for the kinds of data that cause real trouble when they end up in a prompt. Identity and contact details - Names of people and of business entities - Email addresses - Phone numbers, validated across many countries rather than a single region - Postal and street addresses Financial and banking data - Credit card numbers, checked with the Luhn algorithm - IBAN and BIC / SWIFT bank codes - Bank account numbers Government and tax identifiers - National and tax IDs for the United States, United Kingdom, Spain, Italy, France, Germany, the Netherlands, Russia, and the United Arab Emirates, each confirmed by its own checksum - Passport numbers - VAT numbers and the UAE Emirates ID Secrets and credentials - API keys and access tokens from common developer and cloud platforms - Database connection strings that carry a username and password - Bearer tokens and private keys Technical and other identifiers - Crypto wallet addresses - IP and MAC addresses - Vehicle VINs and license plates - Dates and money amounts BUILT TO AVOID FALSE ALARMS A tool that masks everything that vaguely resembles an ID becomes useless fast. Privacy Mask works in two steps. A pattern finds a candidate, then a check confirms it. Credit cards pass the Luhn test. IBANs pass the mod-97 calculation. National IDs pass the checksum rules for their country. A random 11-digit order number sitting in your text is left alone, because it fails every one of those checks. Numbers that only mean something in context, like a tax ID, are masked when the words around them make the meaning clear, and ignored when they do not. DOCUMENTS: PDFS, SCANS AND IMAGES Sensitive data does not live only in typed prompts, so Privacy Mask includes a document editor. Open it from the side panel and load a PDF, JPG or PNG. You see the real pages and a list of what the rules found: type, value and page. - Every occurrence has its own Hidden / Visible switch. Two mentions of the same name are independent, and "Apply to all" changes them together only when you ask for it. - Draw a box over anything the rules missed, or select text and choose Hide selected text. Undo and redo cover both. Original and Result show the page before and after. - Export does not draw a black rectangle over the text. It renders each page, erases those pixels, and rebuilds the PDF from the cleaned images. No original text object, annotation, form field, attachment or metadata survives. The result is not searchable, and the editor tells you so. - The default file name has the hidden values stripped out of it, and the exported file carries no table of originals. - Download PDF writes the file to your computer. Nothing is sent anywhere and no chat is touched. - Attach to... is a separate, explicit action: you pick an open chat tab yourself and hand over the current verified version. It is never sent for you. READS SCANNED PAGES TOO A scan is a picture, and a picture of a contract hides the same data as a typed one. Check page images runs text recognition locally on every page, including scans and mixed text-and-image PDFs. English, Russian and Spanish recognition data ship inside the extension. No download, no server, no optional model required. Recognition is not perfect and the editor does not pretend otherwise. Unchecked, empty and low-confidence pages stay marked as review-required. Review every page and use manual boxes for anything the recognizer missed.…