Redact a PDF in the browser so the hidden text is actually gone

A black rectangle on a PDF is often only a picture of privacy. Many “redact” tools, including the highlighter-as-marker habit in Preview, leave the original text in the file. Anyone who selects, copies, or runs pdftotext can read the salary, the ID number, or the home address you thought you covered.

Redact is built for the other job: permanent redaction. It rasterizes the page and rebuilds an image-only PDF on your computer. The hidden text is destroyed, not painted over. The file does not upload to us.

The failure mode we keep seeing

People export a bank statement, draw boxes, and email the PDF to a landlord or a lawyer. The recipient opens it in a different viewer, hits select-all, and pastes the “covered” lines into a notes app. That is not a rare trick. It is how PDFs work when redaction is implemented as an overlay.

True redaction means the glyphs are gone. A verify step should fail to find the old string. If a tool cannot show you that check, treat the output as a draft, not as a document you can send.

What Redact does on your device

You open https://tools.sw-commercial.com/redact. You pick a PDF from your computer. The page uses pdf.js to show it and pdf-lib plus canvas work to rebuild pages after you mark regions. Signing and form fill live on the same site so you are not bouncing a sensitive file through three upload services.

Client-side here is literal: the PDF stays in the tab. We do not run a file-processing server for this product. We do not receive the contents. That is the same rule as Tool Hub, Invoice Studio, and the other file tools under sw-commercial.com.

How to redact a page

1. Open Redact. You do not need an account.
2. Choose the PDF. Prefer a copy, not the only archival file you have.
3. Mark the regions that must disappear: names, numbers, QR codes that encode the same data, headers that repeat on every page.
4. Run redaction so those regions are burned into an image-only page.
5. Use the verify check for a distinctive string you expect to be gone.
6. Download the new PDF. Keep the original in a folder you will not email by mistake.

If you also need a signature or a filled field, do that on the same site after you understand what will remain in the file. Signing a document that still contains unredacted attachments is a common mix-up.

What we will not pretend

Redact is not a law firm. It will not tell you which fields a court or a hospital requires you to keep. It will not scan a 200-page production and guess. You still choose the boxes. The software’s job is to make those boxes real.

We also will not claim that “no one can ever recover anything.” If you redact page 2 and forget the same number on page 7, the number is still in the file. If you screenshot a page and paste it into Word, you created a new document with its own history. Start from the PDF you will actually send, and check every page.

Why we do not send the file to an AI

Some newer PDF products send text to a model so it can “find PII for you.” That can be useful in a locked-down enterprise stack. It is the opposite of this product. If the point is that a passport scan should not leave the laptop, routing the extracted text through a third-party API is a step backward.

Redact has no file-upload API for the document. There is no “we deleted it after 24 hours” promise, because there is nothing to delete on our side.

Related tools when redaction is the wrong job

• Merge or split first on Tool Hub if you only need to send 3 pages of a 40-page pack — still local.
• Invoice Studio if you are building a new invoice rather than hiding fields on an old one.
• Do not use a generic compress tool as fake redaction. Shrinking a PDF does not remove text.

After you download

Open the result in a second app, not only in the tab that created it. Search for a string that must be gone. If your mail client generates a preview, check that too. Then send the redacted file, not a zip that still contains the original.

This guide is the product walkthrough. The live site is tools.sw-commercial.com/redact. There is no waitlist and no blank category behind the link.