Redact PDF Online

Select sensitive regions and remove them permanently before sharing.

Quick Summary: Redact PDF Online

Select sensitive regions and remove them permanently before sharing. Siliph runs in your browser with encrypted uploads and a built-in AI assistant for portal-specific settings.

What does Redact PDF Online do?

Select sensitive regions and remove them permanently before sharing. Redact PDF permanently blacks out sensitive text and regions—account numbers, personal IDs, health details—before sharing discovery or FOIA releases.

When to use Redact PDF Online

You need to redact pdf online quickly without installing apps
The file contains sensitive data and you prefer local processing

True redaction removes underlying text, not just a black shape overlay reviewers can copy around. Legal, HR, and healthcare teams need irreversible removal before PDFs leave the trust boundary.

Siliph Redact PDF lets you draw redaction boxes in the browser over text and images with encrypted uploads. Applied redactions destroy the hidden content in exported files, unlike cosmetic rectangles added in basic viewers.

Search-assisted redaction speeds bulk removal of repeated Social Security patterns or account tokens across hundreds of pages. Always spot-check edge cases where partial numbers span line breaks.

Files auto-delete within two hours on the free plan, and redaction requires no signup. Flatten PDF after redacting to prevent accidental restoration of annotation layers in careless viewers.

Protect PDF when distributing the redacted packet externally, and keep an unredacted master offline under stricter access controls.

Siliph security tools—password protection, unlocking, redaction, and watermarks—process inside an encrypted browser session so sensitive PDFs stay protected in transit. We delete your files within two hours on the free tier and never gate basic protection behind signup.

Visual Guide

How Redact PDF works

This interactive preview demonstrates the interface layout and processing controls you will find in our workspace above. Everything is designed to be fast, responsive, and completely secure.

Runs completely inside your browser

AES-256 secure encryption

Automated file clean-up within 2 hours

siliph.com/redact-pdf

Click or drag PDF files here

Supports files up to 50 MB / 50 Pages

Secure SSL WorkspaceLocal Browser Preview

How to use Redact PDF online — step by step

Follow these detailed steps to complete your task securely in the cloud.

Upload files

Drag and drop your files into the workspace, or click browse to choose files securely.

Drag & Drop files

Configure parameters

Adjust the settings available on the layout options panel to your preferences.

Configure settings

Process document

Click the process button to start editing securely in the cloud.

Processing...

Download output

Save the final processed file directly to your desktop or device.

Key Features & Benefits of Redact PDF

Discover why thousands of professionals trust Siliph for fast, high-quality document editing and conversion.

AI Tool Assistant

Built-in AI suggests optimal settings and answers questions for every PDF tool.

AES Encryption Shield

Password-protect documents to restrict viewing or unauthorized opening.

Print & Copy Restrictions

Set password permission rules to lock file printing, editing, and copying.

Static Flattening

Flatten interactive form fields and digital signatures to prevent tampering.

Frequently asked questions about Redact PDF

Select sensitive regions and remove them permanently before sharing. Siliph is free to start — no signup required.

No. The tool runs in your browser on phone, tablet, or desktop.

Yes. Siliph lets you use Redact PDF for free. The free plan includes 3 tasks per hour with files up to 50 MB or 50 pages. Paid plans remove these limits and add priority processing.

Yes. Files are transferred over an encrypted HTTPS connection, processed automatically without human access, and deleted from our servers within 2 hours on the free plan.

No. Redact PDF runs entirely in your web browser and works on Windows, Mac, Linux, Android and iOS. There is nothing to download or install.

Embed this tool on your site

Add Redact PDF to your blog or website for free. The embed includes a dofollow backlink to Siliph when you use the attribution snippet below — that helps both sites rank.

Embed (iframe)

<iframe src="https://siliph.com/redact-pdf-online?embed=1" title="Redact PDF — Siliph" width="100%" height="620" style="border:0;border-radius:12px;max-width:900px;" loading="lazy" allow="clipboard-write"></iframe>
<p style="font-size:12px;color:#666;margin-top:8px;"><a href="https://siliph.com/redact-pdf-online" title="Redact PDF — Siliph" rel="dofollow">Redact PDF</a> powered by <a href="https://siliph.com/" title="Siliph — Free PDF Tools" rel="dofollow">Siliph</a></p>

Link for blog posts / tool lists

<p style="font-size:12px;color:#666;margin-top:8px;"><a href="https://siliph.com/redact-pdf-online" title="Redact PDF — Siliph" rel="dofollow">Redact PDF</a> powered by <a href="https://siliph.com/" title="Siliph — Free PDF Tools" rel="dofollow">Siliph</a></p>

Direct link: https://siliph.com/redact-pdf-online