Base64 to PDF Converter

How to Convert Base64 to a PDF

1. Add your Base64. Paste it into the box labeled Or Paste Base64 String, click Paste from Clipboard, or load a .txt file with Choose .txt File.
2. Check what you pasted. A plain string works, and so does a data URL that starts with data:application/pdf;base64,. Spaces and line breaks are ignored.
3. Click Convert Base64 to PDF.
4. Click Download PDF when Conversion Successful appears. A file loaded from a .txt keeps its name with .pdf on the end. Pasted text is saved as converted_ followed by a number.
5. Open the file to confirm it is the document you expected.

Why Use This Base64 to PDF Converter

• Your data stays on your device. The string is decoded by code running in your browser. Nothing is sent to a server.
• Three ways in. Paste text, use the clipboard button, or drop a .txt file that holds the string.
• Forgiving input. Data URL prefixes are stripped for you, and spaces and line breaks inside the string are removed before decoding.
• Clear errors. If the text is not valid Base64, you get a message instead of a broken download.

Good to know: the tool decodes bytes and saves them with a .pdf name. It does not check that the result is really a PDF and shows no preview, so if the file will not open, the string was probably cut off or came from something other than a PDF. It expects standard Base64 (letters, digits, plus and slash). To create a string from a PDF in the first place, use PDF to Base64.

FAQ

How do I convert a Base64 string to a PDF?

Paste the string into the box or load a .txt file, click Convert Base64 to PDF, then click Download PDF.

Can I paste a data URL?

Yes. A string starting with data:application/pdf;base64, works. The tool uses everything after the comma.

Why does my downloaded PDF not open?

The Base64 is probably incomplete, was copied with extra characters, or never held a PDF. Try copying the full string again, and check that it starts with JVBERi, which is how an encoded PDF begins.

What if I get Invalid Base64 format?

The text contains characters outside standard Base64, or it is damaged. Remove anything added around it, such as quotes or labels, and try again.

Is my data uploaded anywhere?

No. The decoding is processed in your browser, so your Base64 and the PDF never leave your device.

Is there a size limit?

Your file size limit is shown on this page, and a free account raises it. The size is judged by the PDF the string would produce.