> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/compare-files/apis.md).

# API to compare PDFs for differences

Compare PDFs effortlessly with our API designed to detect differences efficiently. Enhance your document comparison process on web with ease. The Apryse Web SDK streamlines secure, serverless document

[Core](https://sdk.apryse.com/api/web/Core.html) A namespace containing core control classes.

## Full API

{% hint style="info" %}
[Full API](/web/what-is-webviewer/full-api.md) is mainly used for PDF processing situations that are not featured using the Standard API. The preferred recommendation is to use the Standard API to address your situation when possible. Standard API is easy to use, loaded by default, and performs best for most situations.
{% endhint %}

[PDFNet.PDFDoc](https://sdk.apryse.com/api/web/Core.PDFNet.PDFDoc.html) A high-level class describing a PDF document.


---

# Agent Instructions
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## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.apryse.com/web/compare-files/apis.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.