# PDF redaction library for Android

Permanently redact content within PDF documents. Nutrient Android SDK offers developers a robust API to automate redaction in any app, as well as a beautiful UI for creating, previewing, and applying redactions.

## 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/android/redaction/introduction-to-redaction.md)

## Essential guides

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**Programmatic redaction**

How to use the API to programmatically redact content from PDFs

[Read more](https://www.nutrient.io/guides/android/features/redaction.md)

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**Redact regex patterns**

How to automate redaction by using regex patterns in text search

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

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**Search and redact**

How to automatically create redactions based on search criteria

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

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**Built-in redaction UI**

Learn about the document operations available in the redaction UI

[Read more](https://www.nutrient.io/guides/android/redaction/built-in-ui.md)

**Call to Action**

Start your free trial for unlimited access and expert support.

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

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## Related pages

- [Redacting PDFs in Android viewer](/guides/android/redaction/built-in-ui.md)
- [Master PDF redaction on Android devices](/guides/android/redaction/introduction-to-redaction.md)
- [Using RegEx to redact PDFs on Android](/guides/android/redaction/regex-patterns.md)
- [Redacting PDFs programmatically on Android](/guides/android/features/redaction.md)
- [Search and redact PDFs on Android](/guides/android/redaction/search-and-redact.md)