---
title: "PDF redaction server — Permanent secure redaction | Nutrient"
canonical_url: "https://www.nutrient.io/guides/document-engine/redaction/"
md_url: "https://www.nutrient.io/guides/document-engine/redaction.md"
last_updated: "2026-06-09T10:31:08.528Z"
description: "Unlock the power of redaction with our comprehensive guide. Learn how to securely hide sensitive information in PDF files. Visit now!"
---

# PDF Redaction Server

Document Engine offers developers a robust API to automate redaction by permanently removing content from PDF documents, along with integration with our client-side SDKs for redacting through a UI.

## Introduction to redaction

Redaction is the process of removing image, text, and vector content from a PDF page. This not only involves obscuring the content, but also removing the data in a document within the specified region.

[Learn More](https://www.nutrient.io/guides/document-engine/redaction/introduction.md)

## Essential guides

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**Redact preset patterns**

How to automate redaction by searching for preset text patterns

[Read more](https://www.nutrient.io/guides/document-engine/redaction/preset-patterns.md)

---

**Redact regex patterns**

How to automate redaction by using regex patterns in text search

[Read more](https://www.nutrient.io/guides/document-engine/redaction/regex-patterns.md)

---

**Search and redact**

How to automatically create redactions based on search criteria

[Read more](https://www.nutrient.io/guides/document-engine/redaction/search-and-redact.md)

**Call to Action**

Start your free trial for unlimited access and expert support.

[Learn More](https://www.nutrient.io/sdk/document-engine/getting-started.md)

---

## Related pages

- [Introduction to PDF redaction](/guides/document-engine/redaction/introduction.md)
- [Redact PDFs using RegEx](/guides/document-engine/redaction/regex-patterns.md)
- [Preset pattern redaction](/guides/document-engine/redaction/preset-patterns.md)
- [Search and redact PDFs](/guides/document-engine/redaction/search-and-redact.md)