REDACTION

Permanently remove sensitive content from PDFs

Build secure, flexible redaction workflows into your app — from manual tools, to automated, AI-powered removal. Ensure compliance with regulations like GDPR, HIPAA, and CCPA while preserving the integrity and structure of your documents.

What do you want to do with documents?

Automate redaction

Detect and remove sensitive data using patterns, AI, or custom logic.

Ensure secure removal

Irreversibly delete text, images, and vector data — not just hide them.

Tailor to your needs

Redact by keyword, region, or pattern using manual or programmatic tools.

Handle large volumes

Scale redaction across documents with server or cloud-based workflows.

How we help


REDACTION TOOLS

Advanced SDKs for manual or automated workflows

Give users redaction tools they can see and trust — or automate redaction entirely with full developer control. Nutrient offers redaction across web, mobile, and server environments.

Redaction tools interface
Visual tools

Let users highlight or drag to redact sensitive regions.

Programmatic redaction

Add, preview, and apply redactions via code using flexible APIs.

Search and pattern detection

Use keywords, regex, or preset patterns to find content for redaction.

Built-in AI Assistant

Redact faster with natural language commands in supported interfaces.


SMART REDACTION

AI-assisted detection of sensitive content

Use built-in intelligence to identify PII and confidential data — then redact it at scale.

Smart redaction interface
Pretrained patterns

Detect emails, credit cards, names, and more out of the box.

OCR-backed redaction

Recognize and redact scanned or image-based text.

Custom rules and overrides

Define redaction logic and allow human-in-the-loop confirmation.

Works across deployment types

Available via SDKs, Document Engine, or AI-powered cloud APIs.

CLOUD REDACTION

Redact documents at scale with REST APIs

Process high volumes of PDFs with secure, cloud-hosted APIs — no infrastructure needed.

Redaction API

Automate redaction with keyword search or pattern detection.

AI-powered redaction API

Use intelligent models to locate and remove sensitive data.

Fast, secure, scalable

Built for high-throughput redaction in cloud-native environments.

Simple integration

Connect via HTTPS with predictable results and full auditability.

AI Assistant redaction interface

AI ASSISTANT

Redact with natural language

Let users redact sensitive content using intuitive, conversational commands. Nutrient AI Assistant understands your intent and translates it into secure redaction actions behind the scenes.

No coding or search required

Just type what you want to redact — like “Remove all phone numbers.”

Built-in review step

Users can inspect suggested redactions before they’re applied.

Context-aware accuracy

Identifies sensitive data based on meaning, not just patterns.

Integrated where work happens

Available in any app or UI that supports Nutrient’s AI Assistant SDK.


Supported on your platform




Frequently asked questions

How does redaction work in Nutrient Web SDK?

Redaction is a two-step process: First, users or automation tools mark regions to redact with annotations. Then, when redactions are applied, the content is permanently removed — not just hidden — from the PDF. This ensures compliance with standards like GDPR, HIPAA, and CCPA.

Can users permanently remove sensitive content from PDFs?

Yes. Once a redaction is applied, the underlying text, images, and vector content are irreversibly deleted. The data cannot be recovered from the file — making it safe for secure sharing or archiving.

What types of content can be redacted?

Text, images, annotations, form fields, and vector graphics can all be redacted. On iOS, this includes support for paths and drawings. Our redaction engine ensures the content is truly erased, not just masked.

Is batch redaction or bulk processing supported?

Yes. Redactions can be applied at scale using Nutrient’s backend SDKs or cloud APIs. Automatically redact hundreds or thousands of documents using search patterns, rules, or AI.

Can redaction be automated using AI or patterns?

Absolutely. You can redact using built-in pattern matching (like credit cards or emails), custom regex, or AI-based detection. Nutrient AI Assistant even supports natural-language redaction commands.

Can I try redaction features before purchasing?

Yes. You can try redaction features in our free trial, which includes all SDK and API capabilities (with watermarked output). For full access, contact Sales to request a demo key.

How does Nutrient compare to other PDF redaction tools?

Nutrient offers redaction across web, mobile, server, and cloud — with full developer control and intuitive end user tools. It supports automation, AI, batch workflows, and compliance-grade data removal, all in one platform.

What happens to annotations and metadata during redaction?

When redactions are applied, not only is the visible content removed, but associated metadata and annotations can also be stripped from the document. This prevents sensitive information from lingering in comments, tags, or hidden fields. Developers can configure this behavior to meet specific privacy or compliance needs.

Can users preview redactions before applying them?

Yes. Nutrient’s redaction tools support a review phase, where marked redactions appear as overlays that can be inspected and adjusted. This ensures users — or compliance reviewers — can confirm accuracy before content is permanently removed.


Insights from our team

EXPLORE BLOG

PROVEN AT SCALE

Trusted by the brands that move the world


Replaced paper and email with Nutrient Workflow to automate multilevel approvals across six Latin American offices, processing 236 asset requests.


Renders multipage PDFs and signature tags with Nutrient, keeping 200 million users in 188 countries moving at the speed of eSignature.


Empowers 34,000 pilots to view, annotate, and sign 90‑page flight releases on iPad using Nutrient iOS SDK, saving minutes — and money — on every flight.


FOR DEVELOPERS

Power your app with our SDK in minutes


PDF redaction library

What is a PDF redaction library?

A PDF redaction library is a software toolkit that permanently removes sensitive information (such as PII, financial data, or legal details) from PDF documents. Nutrient’s PDF redaction SDK enables developers to apply manual, semi-automated, and fully automated redaction workflows, ensuring compliance with regulations such as GDPR and HIPAA.

  • Permanently removes sensitive data with no possibility of recovery.
  • Identifies text, images, or patterns manually or programmatically.
  • Supports regex-based searches for quick pattern matching.
  • Ensures compliance with privacy laws by automating redaction workflows.
  • Customizable confirmation UI to prevent accidental redaction errors.
How to choose the right PDF redaction library?

When selecting a PDF redaction library, you need to assess its ability to balance accuracy, security, and flexibility. Consider the following key factors:

  • Accuracy in redaction — Ensure the library reliably removes all instances of sensitive data.
  • Flexibility of workflows — Look for options to implement manual, semi-automated, and batch redaction.
  • Regex support — Verify the ability to identify patterns using regular expressions.
  • Compliance assurance — Ensure compliance with GDPR, HIPAA, and similar standards.
  • API integration ease — Prioritize SDKs that seamlessly integrate into your applications.
What are the best solutions to solve my PDF redaction problem?

To address redaction challenges, consider solutions that provide a balance of flexibility, precision, and compliance support. Nutrient’s PDF redaction SDK offers an optimal mix of these qualities. It provides manual, semi-automated, and batch redaction workflows with full API support.

What are the benefits of using Nutrient’s PDF redaction library?

Nutrient (formerly PSPDFKit) empowers developers to automate sensitive data protection and compliance processes with high precision.

  • End-to-end data security — Permanently removes confidential information without the risk of recovery.
  • Flexible redaction modes — Allows for manual, semi-automated, and batch redaction.
  • Regex-powered search — Identifies complex patterns quickly with advanced search capabilities.
  • API customization — Seamlessly integrates into various client and server environments.
  • Compliance-ready workflows — Ensures alignment with privacy laws like GDPR and HIPAA.
How does Nutrient’s SDK compare to other redaction solutions?

Nutrient’s PDF redaction SDK stands out due to its combination of precision, automation, and ease of integration, giving developers greater control over redaction processes.

  • Superior workflow flexibility — Supports multiple redaction approaches for different use cases.
  • Regex search for high accuracy — Locates sensitive content with unmatched precision.
  • Faster processing for large datasets — Handles high-volume redaction requests effortlessly.
  • Seamless API integration — Allows embedding into diverse applications and platforms.
  • Compliance and security guarantee — Ensures adherence to the latest privacy standards.