Base64 to PDF Converter – Decode Base64 Online, Free

How to Convert Base64 to PDF

Paste the Base64 – Paste the Base64 string or a data: URI into the box, or click "Load from .txt file".
Check the detected type – The tool shows what the data contains: a PDF, an image (JPEG, PNG, GIF, WEBP) or text.
Name the file – Enter a file name if you like.
Convert – Click "Convert to PDF" to download the file.

PDF data – Base64 that contains a PDF is decoded and saved byte for byte – the file is exactly the original.
Images – A Base64 image is placed on an A4 page in the right orientation.
Text – Base64-encoded text becomes a PDF document, in any language.
Flexible input – Accepts data: URIs, line breaks, URL-safe Base64 (- and _) and missing = padding.

Other binary data, such as ZIP or Word files, is not converted – you get an error instead of a broken PDF.
If the PDF data is damaged, the file is still saved, but you get a warning because it may not open.
Base64 text is about one third larger than the file it contains.
Everything runs in your browser – your data is not uploaded to our server.

Paste the Base64 string, check the detected type and click "Convert to PDF".

Yes. Strings that start with data:application/pdf;base64, or data:image/png;base64, are recognised automatically.

No. If the data is a PDF, the decoded bytes are saved without any change.

The text contains characters that are not part of Base64, or it was cut off. Copy the complete string again.

No. Decoding runs in your browser, so the data stays on your device.

Yes – no sign-up and no watermark.

Related tools: PDF to Base64 to encode a file, Validate PDF to check the decoded PDF, and Images to PDF for image files.

Explore the full collection of tools in the PDF Data Tools.