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Format guide · .html

Anonymize an HTML page in your browser

Anonymize any document before it reaches an AI. Nothing leaves your device. Visible text nodes plus alt and title attributes are scanned; tags, attributes, classes and scripts are left as they are.

  • 0 network requests
  • Works with Wi‑Fi off
  • Free, no account
  • Same format back

The tool below is preset for .html files. Up to 10 files, 50 MB each.

  1. 1Upload
  2. 2Choose rule
  3. 3Review
  4. 4Download

Upload

Drop your HTML file here or choose

Up to 10 files · 50 MB each · files stay on your device

  • html

Old .doc, .ppt and .xls files: save them as .docx, .pptx or .xlsx first.

0 network requests during processing

What stays intact

What we preserve in HTML files

The file is edited in place: only the detected text changes. Everything else is written back byte for byte where possible.

  • Markup and attributes

    Tags, IDs, classes, hrefs and data attributes are not modified. Only text nodes are edited.

  • alt and title attributes

    These two attributes carry human-readable text and are scanned like text nodes.

  • Scripts and styles

    Contents of script and style elements are skipped.

  • Entities and encoding

    HTML entities in the source are preserved; replacements are escaped correctly.

What gets detected

Names, numbers and identifiers: three layers

Patterns with checksums (IBAN, national IDs, card numbers, emails, phones, URLs, IPs, dates, plates), your own dictionary of names and terms, and an optional model that runs in your browser for person, company and place names.

  • Person names
  • Companies and brands
  • Places and addresses
  • Emails and phone numbers
  • National IDs, tax IDs, passports
  • IBANs and card numbers
  • URLs and IP addresses
  • Dates and license plates
See how detection works

Questions

HTML questions, answered

Will links, classes or scripts change?

No. Only text nodes and the alt and title attributes are edited. Everything inside tags stays the same.

Are email addresses in mailto: links replaced?

The visible link text is; the href attribute is not, because attributes other than alt and title are not scanned. Check hrefs before sharing.

Can I anonymize a saved email or web page?

Yes. Save the page as HTML and drop it in. Inline images are not read.

Is the page rendered or executed?

No. The file is parsed as text; scripts never run.

Does the file leave my computer?

No. Parsing and replacement happen in your browser; 0 network requests during processing.

Other formats

Same tool, eight more file types

Drop any of these into the tool above; the format is detected from the file, so you never have to switch pages.