Free Base64 to PDF Decoder
Paste a Base64 string or a data:application/pdf URL and turn it back into a real PDF file you can preview and download. Decoding happens entirely in your browser — your document is never uploaded.
How to Use
Paste your Base64 string, click Decode, and the PDF opens in the preview area below. Use the Download button to save it as a .pdf file.
- Accepts raw Base64 or a full data:application/pdf;base64, URL
- Validates that the decoded bytes look like a real PDF
- Inline preview and one-click download
- Runs locally — safe for sensitive documents
What is a Base64 PDF?
Base64 encodes binary file data as plain ASCII text so it can travel inside JSON, HTML or data URLs. Decoding reverses that transformation and restores the original PDF bytes.
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