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Sanitize a document before you share itPage 1 of 3
Guide · sanitize a document before sharing

Sanitize a document before you share it

Sanitizing a document means taking out what the recipient should not see. Re-Doc handles the personal data in the content itself: names, contact details, ID and account numbers. Text-based files get realistic replacements so they stay usable, and scans get permanent black boxes.

Upload a file, first 10 pages freeSee pricing
Example

What Re-Doc changes

Orange boxes are what Re-Doc finds on its own. Text-based files keep their layout, and each real value is swapped for a realistic synthetic one.

1. Your documentonboarding.docx
Vendor Onboarding Form
Procurement · Draft
ContactBen Thompson
Direct line+1 646 555 0193
Tax ID84-2019935
Bank account0091 4471 2280
CategoryIT services
2. Safe to shareonboarding_safe.docx
Vendor Onboarding Form
Procurement · Draft
ContactAdam Lewis
Direct line+1 646 555 0472
Tax ID84-6630178
Bank account0058 1932 6614
CategoryIT services
What to replacePage 2 of 3
Checklist

What to replace, and what to keep

Usually replaced

  • Names and contact details: of people in the document
  • Tax, bank and ID numbers: kept in the right format
  • Customer and partner names: add them in an instruction
  • Anything else you list: in plain words before you start

Usually kept

  • The document's purpose and structure
  • Non-personal figures and terms
  • The file format
Tip

Sanitizing also covers hidden data. Before sharing, clear the file's properties, comments and tracked changes in your editor, since they can hold names too.

How it works

Three steps

  1. STEP 1

    Upload

    PDF, Word, TXT, scan or photo, up to 50 MB. Sign in with Google; the first 10 pages are free.

  2. STEP 2

    Review

    Re-Doc highlights every change. On scans you can add or remove boxes; for any file you can describe what to keep or remove in plain words.

  3. STEP 3

    Download

    Get the safe copy in the same format you uploaded, with the layout unchanged.

QuestionsPage 3 of 3

Frequently asked questions

01Does Re-Doc remove metadata?
Re-Doc works on the visible content: the text and, for scans, the image. Check the file's properties, comments and tracked changes in your editor as well.
02Replace or black out?
Text-based PDF, Word and TXT files get realistic replacements. Scans and photos get black boxes. TXT files can also use ████ blocks.
03Can I review the changes?
Yes. Every change is highlighted, and the list can be exported as CSV.
04Is it free?
The first 10 pages are free after signing in with Google.
Anonymize a PDF and keep it readableAnonymize a PDF without black boxes. Re-Doc replaces names, emails, IDs and addresses with realistic synthetic values and keeps the layout. 10 pages free.Replace the names in a PDF or Word documentReplace every name in a PDF or Word document with a realistic fictional name, consistently across pages, without breaking the layout. First 10 pages free.Anonymize documents before you use them with AIRemove personal data from documents before you paste them into ChatGPT, Claude or other AI tools. Re-Doc swaps it for realistic synthetic values first.All anonymization guides →