Is my Base64 PDF safe from third parties?

Yes, conversion happens entirely in your local browser runtime. No file or text is sent to any external server.

Does it matter if the string starts with data:application/pdf;base64,?

No, both formats are automatically supported and cleaned.

What do I need to enter?

Just Paste Base64 Encoded PDF and File Name. Every field has a sensible default you can start from.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Does it work on a phone?

Yes. The layout adapts to small screens and needs no app or signup.

Base64 to PDF Converter & Viewer

Decode Base64 string into a downloadable PDF document with live in-browser preview.

100% free
Private in browser
No signup
No watermarks

Paste Base64 Encoded PDF

File Name

Size: 0.6 KB

PDF In-Browser Preview

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About Base64 to PDF Converter & Viewer

Easily convert Base64 strings into downloadable and viewable PDF documents. Handles raw Base64 data strings as well as data URI formats (data:application/pdf;base64,...), showing instant preview and one-click PDF download.

How to use Base64 to PDF Converter & Viewer

Paste your Base64 encoded PDF string into the input box.
The tool decodes and validates the PDF binary header.
Preview the PDF document directly inside the viewer.
Click Download PDF to save the file to your device.

Key features

Supports raw Base64 and data URI (data:application/pdf;base64,...) prefixes
Instant in-browser PDF preview
Calculates exact decoded file size in KB/MB
One-click file download with custom filename
100% secure and client-side (no documents leave your machine)

Frequently asked questions

Is my Base64 PDF safe from third parties?: Yes, conversion happens entirely in your local browser runtime. No file or text is sent to any external server.
Does it matter if the string starts with data:application/pdf;base64,?: No, both formats are automatically supported and cleaned.
What do I need to enter?: Just Paste Base64 Encoded PDF and File Name. Every field has a sensible default you can start from.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?: Yes. The layout adapts to small screens and needs no app or signup.

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