How do I redact and prepare a PDF without uploading it?

Open this page, enable the steps you need (scan/redact, clean, watermark, encrypt), run Confidential Send, then check the download with the privacy checker.

Is this the same as drawing a black box?

No. Auto-redact and Redact rebuild matched pages so text under black is removed, not just covered. Always verify afterward.

Can I batch multiple PDFs?

Yes — up to 20 unlocked PDFs. Successful outputs download as a zip, optionally with a privacy receipt.

Short answer

Use the Safe to Email checklist below with Confidential Send: scan PII, review, redact, strip metadata, compress if needed, encrypt last, then download a privacy receipt. Verify with the PDF privacy checker before you send. Nothing is uploaded.

Stays on your device·No upload·No account·No watermark·Offline after install·How it works Methodology Privacy

Prepare a PDF for safe sharing

Free · private · files stay on your device

Guided privacy workflows

Pick a preset, toggle steps, then run the same pipeline on one file or a batch (up to 20). Everything stays in this browser — scan, redact, strip metadata, compress, and optionally encrypt.

Safe to Email — guided steps

Follow this path with Confidential Send or Email Ready. Toggles below control what runs.

1
Upload PDF locally
Drop files below — they never leave this tab.
2
Scan for PII
Privacy scan reports emails, phones, and similar patterns.
3
Review detected items
Read the scan summary before redacting or sending.
4
Redact selected items
Auto-redact matched patterns (pages rebuild so text is destroyed).
5
Remove metadata and attachments
Strip Info fields; pair with Deep Clean for embeds/forms.
6
Compress to target size
Email Ready includes keep-text compress; or use Compress for email after.
7
Encrypt optionally
Password-protect last when sharing confidentially.
8
Download privacy receipt
Export the PDF plus a local receipt with hashes after the run.

Drop files or browse

Drop one or many PDFs — Confidential Send / Email Ready, all local

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How it works

1
Drop one or many unlocked PDFs (up to 20).
2
Pick Confidential Send or Email Ready; toggle steps as needed.
3
Enter a password if encrypt is on, run, review, then download the PDF or zip (and optional privacy receipt).

Files never leave your device

Your PDF is processed in this browser tab. Files never leave your device, and mypdf.space does not receive uploads. No account, no watermark, no server-side copy.

Limits worth knowing

Pattern-based PII detection is not a guarantee — always review the output.
Redacted pages are rebuilt as images so covered text is destroyed.
Sign/certificate e-sign is not included; encryption uses a password you choose.

Frequently asked questions

How do I redact and prepare a PDF without uploading it?
Open this page, enable the steps you need (scan/redact, clean, watermark, encrypt), run Confidential Send, then check the download with the privacy checker.
Is this the same as drawing a black box?
No. Auto-redact and Redact rebuild matched pages so text under black is removed, not just covered. Always verify afterward.
Can I batch multiple PDFs?
Yes — up to 20 unlocked PDFs. Successful outputs download as a zip, optionally with a privacy receipt.

Written by Sumit · Last updated 23 Oct 2026