A question. A clear answer.

Open the document in Anoni. A French model (CamemBERT) and business rules spot the sensitive data, locally. Click “Copy for AI”: names, company numbers, addresses and IBANs become realistic pseudonyms, and the text is copied. Paste it into ChatGPT or another AI. Paste the reply back into “Decode”. Anoni restores the real data from your encrypted vault.

Anoni offers two modes. With pseudonymization, “John Smith” becomes “Mark Lee”. The document stays natural for an AI and stays reversible through a vault encrypted with AES-256-GCM, derived from your passphrase. With redaction, the data is hidden behind real opaque black bars in the exported PDF. It’s irreversible, for safe distribution.

Yes, and for free. You write a short sentence, “Document provided solely for …” for instance, and Anoni tiles it diagonally across every page. The mark is baked into the PIXELS: each page is rendered to an image and the PDF is rebuilt from it, so it does not come off with one click the way a watermark drawn as a layer does. The trade-off to know before you send: the text is no longer selectable and the file is heavier. Anoni takes PDFs, JPGs and PNGs, and always returns a PDF. The free version adds a small anoni.dev mark alongside yours. Writing a watermark and applying it needs no Pro licence; only per-copy tracing, with a code for each recipient, does.

Anoni handles PDF, DOCX, Excel, email (.eml), TXT, Markdown, CSV and images (JPG, PNG, HEIC…), with local OCR (French and English) for scanned PDFs and images. It detects names, company numbers, organizations, places, addresses, emails, phone numbers, IBANs, national ID / social security numbers, dates and secrets. You can also add a personal dictionary, manually select a missed word, or draw a redaction box over a signature or a stamp.

No. Detection and anonymization run on your Mac or PC. Turn off Wi-Fi: everything keeps working. No document, no excerpt, no personal data is sent online, not to us, not to anyone. The first launch downloads the engine and detection models once. Never your files.

Everything runs locally. No personal data leaves your machine. Each run produces an anonymization report (categories, counts, exclusions, SHA-256 fingerprint, version) with no personal data, ready to keep on file. Automatic detection is not a guarantee of compliance. On a sensitive document, read it through first. The tool helps. It doesn’t decide for you.

They cover a hosting provider: how a company keeps your data on its servers. Anoni hosts nothing. Your documents stay on your machine, so there is no server to certify.

Because your documents still leave your machine. They go to the AI provider’s servers. For professional confidentiality and the GDPR, a contractual promise is not enough. Regulators recommend pseudonymizing before sending. With Anoni, sensitive data never reaches the AI, promise or not.

Anoni is lightweight and needs no graphics card. It runs on macOS 13.4 (Ventura) or newer, Windows 10 / 11 (64-bit) and recent 64-bit Linux distributions. On Apple Silicon Macs, AI detection needs macOS 14: below that Anoni still opens and detects with its French rules, and tells you so. Plan for 8 GB of RAM (4 GB minimum) and about 3 GB of disk space for the engine and detection models, downloaded once on first launch. After that, everything works offline.

macOS, Windows and Linux, with signed updates. On macOS, the app is signed and notarized by Apple: it opens with a double-click. On Windows, SmartScreen may still show a warning at install: click “More info” → “Run anyway”.

Yes. Every current Anoni feature is free, no subscription. Downloaded here, Anoni asks for an email address once, on first launch. Installed from the Mac App Store, it asks for none. You get French detection, realistic pseudonyms, the encrypted vault, PDF redaction (with the anoni.dev mark), the personal dictionary, the local GDPR report and OCR for scanned PDFs. A Pro edition, with advanced features, is under consideration.