Top 5 Free Apps to Redact PDF on iOS and Android
2026-04-08 18:37:08 • Filed to: Free Apps • Proven solutions
Redacting a document is a very important practice for almost everybody who deals with documents. Everyone, ranging from sole proprietors, companies, law firms, to government agencies have to redact their documents in order to hide some private and confidential information. Most people understand the importance of document redaction. However, they face a challenge in getting the best redaction app. In this article, we have listed down the top 5 free redact apps to use on your iOS or Android devices.
1. PDFelement (iOS and Android)
PDFelement app on iOS and Android is a versatile PDF editor with tools for annotation, form filling, and file management. However, on mobile, its redaction capability is not as robust as desktop versions. While official documentation mentions redaction, in real-world mobile use, users often rely on annotation tools (like drawing or shapes) to black out content, which does not always guarantee permanent data removal.
Its strength lies in usability. The interface is clean and beginner-friendly, making it easy to mark up documents quickly. It also integrates with cloud services, allowing you to access files across devices. This makes it useful for quick edits, document review, and light privacy needs.
PDFelement is best for non-sensitive tasks, such as hiding information in drafts or internal documents, rather than handling legally sensitive redactions.
How to redact PDF using PDFelement
- Step 1: Open the PDF in PDFelement app.
- Step 2: Tap the Comment tool.
- Step 3: Select a shape and choose a black fill color to cover the sensitive text manually.
- Step 4: Save or export the document
Verdict
PDFelement is a lightweight, convenient option for quick edits, but on mobile, it functions more like a visual masking tool than a secure redaction solution.
2. Adobe Acrobat (iOS and Android)
Adobe Acrobat Reader is one of the few mobile apps that provides true, secure redaction. Its redaction feature removes underlying data permanently, ensuring that sensitive information cannot be recovered.
The app is highly reliable and widely used across industries. It supports cloud syncing, document signing, and advanced editing features. On mobile, the redaction tool is typically available through premium features, but it delivers the same level of security as desktop versions.
Adobe Acrobat is ideal for legal, financial, and professional workflows where compliance and data protection are critical. It’s also useful for preparing documents before sharing externally.
How to redact PDF using Adobe Acrobat Reader
- Step 1: Open the PDF in Adobe Acrobat Reader.
- Step 2: Tap Edit and select the Redact feature.
- Step 3: Highlight text or areas to cover and tap Apply Redactions.
Verdict
Adobe Acrobat Reader is the most secure mobile option, offering true redaction that permanently removes sensitive data.
3. Xodo PDF (iOS and Android)
Xodo PDF is one of the few mobile apps that supports actual redaction tools, not just annotation overlays. On iOS and Android, users can access a dedicated redaction feature (typically via subscription or trial), allowing them to permanently remove sensitive information.
Its biggest advantage is flexibility. Xodo combines annotation, editing, and redaction in one app, making it a strong all-in-one solution. It also allows flattening documents, which helps ensure that annotations are locked into the file.
Xodo is suitable for both casual and semi-professional workflows, such as preparing documents for sharing, removing personal data, or editing reports.
How to redact PDF using Xodo PDF
- Step 1: Open the PDF in the Xodo app.
- Step 2: Tap Toolbox and select Redact PDF.
- Step 3: Highlight text or draw over areas and tap Apply to finalize.
- Step 4: Save the redacted PDF document.
Verdict
Xodo is a strong mid-tier option, offering real redaction tools with a more affordable and flexible approach than Adobe.
4. PDF Expert (for iOS Only)
PDF Expert is an iOS PDF app that allows you to annotate and edit your PDF files. It is a powerful program that allows you to redact PDF files by highlighting it with its dark color. To add on this multilingual app enables you to view and manage your PDF files. Moreover, it allows you to digitally sign PDF files right from your screen. It can also fill out PDF forms, merge PDF files, zip files and send them to iCloud, Email, Dropbox and Google Drive. To add on, this app comes with sleek design and supports different file formats like PDF, Presentations, Spreadsheet, Images, Videos, Audios, and Archives.
The app is optimized for speed and usability, making it ideal for professionals who need to work quickly on mobile devices. Its interface is polished, and it integrates well with cloud storage, making document handling seamless.
PDF Expert is commonly used for business workflows, such as reviewing contracts, preparing reports, or editing client documents before sharing.
How to redact PDF using PDF Expert
- Step 1: Open PDF Expert and tap the Tools menu.
- Step 2: Select Redact PDF.
- Step 3: Drag over text or areas and apply the redaction.
Verdict
PDF Expert delivers a premium mobile experience, combining speed, usability, and reliable redaction for professional users.
5. Redacted PDF (for Android Only)
Redacted PDF is a niche app focused entirely on secure redaction rather than full PDF editing. Its design prioritizes privacy, offering a streamlined workflow for permanently removing sensitive information.
Unlike general-purpose editors, it eliminates unnecessary features and focuses on doing one thing well—securely cleaning documents. This makes it particularly useful for users who frequently handle confidential files.
It is ideal for quick, focused tasks, such as removing personal data before sharing documents externally or preparing files for compliance.
How to redact PDF using Redacted PDF
- Step 1: Import your PDF into the Redacting app.
- Step 2: Select the redaction tool and highlight sensitive text or images.
- Step 3: Apply changes to remove the sensitive data.
- Step 4: Save the cleaned file.
Verdict
Redacted PDF is a specialized, privacy-first tool, best suited for users who want simple and secure redaction without extra features.
FAQs about PDF Redaction and Annotation on Mobile Devices
Q: What does PDF redaction really mean？
PDF redaction means permanently removing sensitive information from a PDF so it cannot be seen, copied, searched, or recovered later. This is different from simply covering text with a black box or changing how it looks on screen. True redaction deletes or securely removes the underlying content from the document. It is commonly used for things like names, addresses, financial details, legal information, or confidential business data. If a tool only hides the text visually, the information may still be exposed when someone copies the text or opens the file in another app.
Q: What is the difference between highlighting and true redaction on mobile devices?
Highlighting only marks content, while true redaction removes it permanently. A highlight changes the appearance of text so it stands out, but the original words remain fully visible and searchable. True redaction is a security feature that strips the sensitive content from the PDF itself.
If you need privacy or legal compliance, use a PDF app that specifically supports permanent redaction rather than basic annotation tools.
Q: How can I redact a PDF on Android for free?
You can redact a PDF on Android for free by using a mobile PDF app that supports redaction or secure content removal. Here are three practical solutions:
- PDFelement for Android: A strong first option for viewing, annotating, and handling PDF tasks on mobile. If redaction tools are available in your version or workflow, open the PDF, choose the redaction or protection-related feature, mark the content you want to remove, then save the file as a new copy. Check the app version because mobile features can vary.
- Xodo: Useful for basic PDF work on Android. If true redaction is not built into your version, you can still review and mark sensitive areas, but you should confirm whether the content is permanently removed before sharing the file.
- Adobe Acrobat Reader for mobile: Good for reviewing and commenting on PDFs, and in some cases can be part of a secure redaction workflow depending on your subscription level and platform features.
For truly sensitive files, always test the saved PDF by searching or copying the redacted text.
Q: Is there a completely free app to permanently redact PDFs on Android?
A completely free Android app for permanent PDF redaction is hard to guarantee because many mobile PDF apps offer annotation for free but reserve true redaction for premium plans or desktop versions. That is an important distinction, because drawing a black box over text is not the same as secure redaction.
If you only need occasional redaction, some apps may offer limited free features or trial access, but availability can change by version. The safest approach is to check whether the app explicitly says it supports permanent redaction, not just markup or drawing.-
Q: How do I properly redact a PDF on iPhone?
A: To properly redact a PDF on iPhone, you need an app that supports true redaction rather than simple markup.
- Step 1. Open the PDF in a redacting app, such as Adobe Acrobat, Xodo app.
- Step 2. Select the text, images, or areas you want to remove permanently.
- Step 3. Apply the redaction so the original content is deleted, not just covered.
- Step 4. Save the redacted PDF as a new file.
This matters because proper redaction is about security, not appearance. If the content is sensitive, avoid relying on basic drawing or highlight tools alone.
Q: Can I use iPhone Markup to redact a PDF?
No, iPhone Markup should not be trusted for true PDF redaction. It can draw over content, highlight text, or add shapes, but that usually only hides the information visually. In many cases, the original text is still present underneath and may still be searchable, selectable, or recoverable. Markup is fine for quick notes, signatures, or simple annotations, but it is not the same as permanent redaction.
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Elise Williams
chief Editor