PDF to Base64 Converter

Convert PDF documents to Base64 encoded strings for embedding or data transfer.

PDF Input

or drop PDF here

Base64 Output

Upload a PDF and click 'Convert' to generate Base64 output.

PDF to Base64 Encoding

Why convert PDFs to Base64?

Base64 encoding converts your PDF into a text string that can be embedded directly in JSON, XML, HTML, or transmitted through text-based protocols. This is useful for sending PDFs via APIs, storing in databases, or embedding in web applications.

When should I use Raw Base64 vs Data URL?

Choose based on your use case:

Data URL — Use this for embedding in HTML <iframe> or <object> tags, or when the receiving system expects the full data URI format with MIME type.
Raw Base64 — Use this when storing in databases, sending via APIs, or when the receiving system handles the MIME type separately.

What file types are supported?

This tool supports PDF files only. For other document types, convert them to PDF first using your preferred application.

Is there a file size limit?

Yes, files up to 10MB are supported. Keep in mind that Base64 encoding increases the data size by approximately 33%. For very large PDFs, consider compressing them first or using direct file transfer methods instead.

Is my PDF data secure?

Your PDF never leaves your browser. All conversion happens locally on your device using JavaScript — nothing is uploaded to any server.

How do I decode the Base64 back to PDF?

You can use our Base64 to PDF Decoder tool to convert the Base64 string back into a downloadable PDF file.