PDF to Base64
Encode a PDF file as a Base64 string. Runs entirely in your browser, so your data never leaves your device.
Drop a PDF here, or click to browse
Files never leave your device
Output
The result appears here as you type.
How to use PDF to Base64
- 1. Add your PDF. Drop a .pdf file into the workspace or browse for one. PDF to Base64 loads the document and reads its raw bytes ready for encoding.
- 2. Choose whether to prefix a data: URL. Turn on Prefix as a data: URL to get a string starting with 'data:application/pdf;base64,' that can be dropped directly into an HTML src or CSS attribute; leave it off for raw Base64.
- 3. Copy the encoded string. Copy the Base64 output from the result pane and paste it wherever a text-only representation of the PDF is needed, such as a JSON payload or an embedded resource.
When to use PDF to Base64
PDF to Base64 is for turning a binary PDF file into a plain text string that can travel through systems built only for text, such as JSON APIs, config files or database columns. It runs entirely in your browser, so the file never has to leave your machine to get encoded.
- Embedding a PDF in a JSON API payload. An internal API accepts document uploads as a Base64 field inside a JSON body rather than multipart form data, so the PDF needs encoding before it can be sent.
- Storing a small PDF in a database column. A legacy system stores document attachments as text in a database column instead of a file store, requiring the PDF to be Base64-encoded before insertion.
- Inlining a PDF preview in an HTML page. A static site wants to embed a short PDF directly in an iframe's src attribute as a data: URL, avoiding a separate network request for the file.
- Testing an API that expects Base64 uploads. You're writing an integration test against a document-processing API and need a quick way to turn a sample PDF into the Base64 string the request body expects.
About the PDF to Base64 tool
PDF to Base64 does its work locally, right in the browser. Encode a PDF file as a Base64 string. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the PDF Tools collection on EditSafely, a set of 92 small, focused PDF utilities that share the same instant, private workspace.
You can shape the output with the Prefix as a data: URL setting, and the result refreshes the moment you change it.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Is PDF to Base64 free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Are my files uploaded to a server?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
Which files does PDF to Base64 accept?
It accepts PDF documents. There is no file size cap imposed by a server; very large files are limited only by your device's memory.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.