Privacy

What Blurrrer does with your data

Short version: nothing. Long version below. This page is maintained by the Blurrrer project to answer common security and privacy questions.

Where your screenshots go

Every screenshot you drop into Blurrrer is decoded, OCR'd, scanned for sensitive patterns, and redacted inside your browser tab. The image, the extracted text, and the list of detected findings never touch a Blurrrer server — there is no Blurrrer server for user content.

What we send over the network

  • The initial HTML, CSS, JS, and fonts that make up the app itself, served from this domain.
  • On first OCR run, the Tesseract.js worker script, WASM core, and English language data are fetched from public CDNs (unpkg.com and tessdata.projectnaptha.com) and then cached by your browser. These fetches don't include your screenshot.
  • No analytics. No trackers. No error-reporting service.

The site enforces a Content Security Policy that blocks any other outbound connection, so a compromised script can't quietly exfiltrate an image.

Cookies & storage

Blurrrer sets no cookies. The extension uses chrome.storage.sync only to remember your per-site preference (Ask / Always / Never). That preference is scoped to your Chrome profile.

The Chrome extension

The extension intercepts pastes and file uploads on ChatGPT, Claude, Gemini, Copilot, Perplexity and Grok. It runs the same local detectors, shows a warning modal, and either sanitizes the text in place or opens this web app for image redaction. It never uploads intercepted content anywhere.


Install the extension

  1. and unzip it.
  2. Open chrome://extensions in Chrome, Edge, Brave, Arc, or Opera.
  3. Enable Developer mode (toggle in the top-right).
  4. Click Load unpacked and select the unzipped extension/ folder.
  5. Open ChatGPT / Claude / Gemini. Paste text or drop a screenshot — Blurrrer takes it from there.

The extension isn't in the Chrome Web Store yet; unpacked install is the supported path.


Support & contact

Blurrrer is a small project maintained by volunteers. There is no on-call desk, but bug reports, feature requests, and privacy questions are welcome.

By using Blurrrer you agree to the Terms of Use.