DEVELOPER · BASE64
Base64 to PDF
Decode Base64 encoded strings into readable PDF files, or encode your PDF documents into Base64 strings for developer APIs — free, unlimited, and 100% private.
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How it works
01
Paste Base64 String
Paste your raw data:application/pdf;base64 string or binary text.
02
Decode & Preview
Our tool parses the Base64 stream and displays a live preview of the PDF.
03
Download PDF
Download the decoded binary document directly to your computer.
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Frequently asked questions
What is Base64 encoding used for in PDFs?
Base64 is commonly used by developers and REST APIs to transmit binary PDF files as text strings inside JSON payloads.
Can I convert PDF back to Base64?
Yes, bidirectional conversion is supported: PDF-to-Base64 and Base64-to-PDF.
Why do my PDFs load or process slowly?
Since there is no server involved, all processing speed depends entirely on your computer and browser's hardware. Large files may take longer on older devices or if your browser is under heavy load.
Is there a file size or page limit?
No fixed limits. Because your own device does the work, even documents with hundreds of pages are processed without running out of memory. Very large jobs simply take longer.
What happens with password-protected or damaged PDFs?
Password-protected PDF files cannot be processed by other tools until their password is removed. You can first use our free "Unlock PDF" tool on this website to remove the password with 100% privacy, and then freely use your unlocked file across any of our tools. Corrupted or unreadable PDF files are safely skipped with a clear error message.
Do I need an internet connection to use the tools?
You only need an internet connection to load the website initially. Once the page is loaded, the tools work entirely offline because all the processing happens directly inside your browser.
Is there a limit on how many files I can process per day?
Absolutely no limits. Since your own device is doing the processing, there are no server costs, meaning you can convert, merge, or split as many documents as you want, completely free forever.
Does the quality of my PDF decrease after processing?
No. We use high-quality rendering engines. For image conversions, you can even select the exact DPI (up to 300 for print quality) to ensure no loss of detail. Merging and splitting operations preserve the original document quality perfectly.