Free PDF to Base64 Tool
Need your PDF as text? Encode it to a Base64 string for APIs, data URIs and code — with one-click copy for the raw string or the full data URI, plus character counts and size stats.
Drop a PDF file here or click to browse
One PDF file
How to Use the PDF to Base64 Tool
- Drop your PDF into the box above.
- Click “Convert to Base64” — the encoded string appears with character count and overhead stats.
- Copy what you need — the raw Base64 string, the full data URI, or download it as a .txt file.
Features
Three output options cover every integration: the raw Base64 string for APIs and databases, the complete data:application/pdf;base64, URI for direct browser embedding, and a TXT download for storage. Live statistics show original size, character count and the exact encoding overhead so there are no surprises.
Benefits & Use Cases
Developers embed PDFs in JSON API payloads and test fixtures. Web authors create self-contained <embed> tags with data URIs. Support teams paste documents into text-only ticketing systems. Anyone moving a PDF through a channel that only accepts text gets a reliable encoding in one click.
Tips
Expect ~33% size overhead — that is normal for Base64. For HTML embedding, the data URI option is ready to paste into src attributes. Very large PDFs produce very long strings that can freeze editors; consider hosting the file instead for multi-megabyte documents. To reverse the process, use the Base64 to PDF tool.
Frequently Asked Questions
Is the PDF to Base64 encoder free?
Yes. Encode as many PDFs as you like with no account and no limits.
Are my files uploaded to a server?
No. Encoding runs entirely in your browser, so your document never leaves your device.
What is Base64 used for?
Embedding files in JSON APIs, data URIs in HTML/CSS, and transmitting binary data through text-only channels like email bodies or code.
Why is the Base64 output larger than my PDF?
Base64 expands binary data by about 33% — that overhead is inherent to the encoding, not a bug.
What is the difference between the Base64 string and the data URI?
The string is the raw encoded data; the data URI adds the "data:application/pdf;base64," prefix so browsers can render it directly in links and embeds.
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