# PDFToolsBase

> A free collection of browser-based PDF tools that run entirely on the user’s device.

## Primary purpose

Each tool performs a specific PDF task (merge, split, compress, convert, organise, and more) directly in the browser, with files processed on the user’s own device.

## Important sections

* [Home](https://pdftoolsbase.com/)
* [Contact — PDF Tools Base](https://pdftoolsbase.com/contact)
* [Add Header and Footer to PDF | PDF Tools Base](https://pdftoolsbase.com/add-header-and-footer-to-pdf/)
* [Add Image to PDF – Free Online Tool | PDF Tools Base](https://pdftoolsbase.com/add-image-to-pdf/)
* [Add Margins to PDF – Free Online Tool | PDF Tools Base](https://pdftoolsbase.com/add-margins-to-pdf/)
* [Add Page Numbers to PDF – Free Online Tool | PDF Tools Base](https://pdftoolsbase.com/add-page-numbers-to-pdf/)
* [Add Signature to PDF – Free Online Tool | PDF Tools Base](https://pdftoolsbase.com/add-signature-to-pdf/)
* [Add Text to PDF – Free Online Tool | PDF Tools Base](https://pdftoolsbase.com/add-text-to-pdf/)
* [Add Watermark to PDF – Free Online Tool | PDF Tools Base](https://pdftoolsbase.com/add-watermark-to-pdf/)
* [Annotate PDF – Free Online Tool | PDF Tools Base](https://pdftoolsbase.com/annotate-pdf/)

## Key page groups

* Tool (161): browser-based tools, one task each.
* Policy (4): privacy/terms/legal pages.
* Contact (1): contact details.
* Home (1): site entry point.

## Machine-readable files

* [Full LLM index](https://pdftoolsbase.com/llms-full.txt)
* [LLM sitemap](https://pdftoolsbase.com/llms-sitemap.xml)
* [XML sitemap](https://pdftoolsbase.com/sitemap.xml)

## Notes for AI assistants

All content is factual and specific to PDFToolsBase; pages are static and figures come from the pages themselves. This llms.txt is an optional readability aid and is not required by any search engine. PDF tools share a common in-browser PDF-processing pattern, and some pages cover closely related tasks (for example organising pages or filling forms) described with different common search phrasings. All processing runs on the user’s own device.