Free PDF Tool · Encode

PDF to Base64

PDF to Base64 is a browser-based PDF tool on PDFToolsBase. PDF to Base64: encode a PDF file into plain Base64 text or a data URI in your browser. No server upload, no signup, no watermark. To use it, upload or drop your PDF and view the result directly in your browser — no signup and nothing to install.

Run PDF to Base64 in your browser. Free, private, no signup — your selected files are processed in your browser and are not uploaded to our server.

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Drop your file here

or click to browse from your device

Accepts: .PDF
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About this PDF to Base64

Convert your PDF into a Base64 string with our PDF to Base64 tool. Useful for embedding PDFs in HTML data URLs, API payloads, JSON storage, or anywhere a binary-safe text representation is needed.

Your privacy is the default. Your selected files are processed in your browser and are not uploaded to our server; all processing happens client-side using the browser FileReader, Blob, and Base64 APIs. Closing the tab clears the working session from this page; downloaded files remain on your device.

This tool is free to use with no signup required. Large files may be limited by your browser’s memory and device performance. Part of PDF Tools Base, a privacy-first collection of 161 PDF utilities. Bookmark the page for next time, and explore related tools in the footer below.

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How to use the PDF to Base64 tool

  1. Drop your PDF.
  2. Click Process.
  3. Download the Base64 text — paste it anywhere you need a text representation of the PDF.

Why use PDF Tools Base?

100% Browser-Based

PDF to Base64 processes selected files in your browser. Your selected files are processed in your browser and are not uploaded to our server.

No Server Upload, No Signup

Your selected files are processed locally in your browser. No account, no server upload, no email needed.

No Watermark Ever

Outputs are clean. We never stamp our brand or a paywall watermark on your files.

Free to Use

No accounts and no signup. Use the tool as much as you need within reasonable browser limits.

Works on Every Device

Windows, Mac, Linux, iPhone, iPad, Android, Chromebook. Any modern browser.

Built on Open Source

Powered by built-in browser APIs (FileReader, Blob, Base64) — no heavy PDF libraries needed.

Common uses for PDF to Base64

Email attachments via API

Some mail APIs want Base64.

Database storage

Some systems prefer Base64 strings to BLOBs.

Inline HTML

Embed a PDF directly in a data URL.

Frequently asked questions

Is PDF to Base64 safe to use?

Yes. Everything happens in your browser. Your selected files are processed in your browser and are not uploaded to our server. Closing the tab clears the working session from this page; downloaded outputs remain on your device until you delete them.

Do I need to register or sign in?

No. No account, no email, no sign-up. Open the page and start using the tool immediately. Free to use, no signup needed.

Is there a watermark on the output?

No. PDF Tools Base never adds a watermark or branding to your output. Your final file is clean — just what you produced from the original.

Is there a file size limit?

This tool currently limits PDF input to 25 MB because Base64 grows by about 33% and browser memory is limited.

Does this work on mobile devices?

Yes. The tool works on all modern mobile browsers: Chrome on Android, Safari on iOS, Firefox, Edge, Brave. The drag-and-drop also accepts files from your phone’s file manager.