How to convert PDF to Base64
Follow these steps to convert PDF to Base64:
- Add one or more PDF files — drag and drop them or click to browse.
- Click Convert to Base64 and let the conversion run in your browser.
- Download your new Base64 files individually or as a batch.
What is PDF?
PDF is the universal format for sharing finished documents exactly as they were designed. It locks fonts, layout, images and text into a single file that looks identical on every device, which makes it the standard for invoices, contracts, forms and ebooks.
What is Base64?
Base64 encodes binary data as plain ASCII text so it can travel safely through systems built for text, such as email, JSON and data URLs. It is not encryption — anyone can decode it — but it keeps binary intact wherever only text is allowed.
PDF vs Base64: how they compare
Before converting, it helps to know how PDF and Base64 stack up. The table below breaks it down.
| Base64 | ||
|---|---|---|
| Format type | Document | Text |
| Compression | Mixed (per object) | None (expands ~33%) |
| Quality | Lossless | Lossless |
| Best for | Sharing finished documents | Embedding files in JSON or HTML |
Why convert PDF to Base64?
The usual reason to turn PDF into Base64 is compatibility: Base64 is the right fit for embedding files in json or html and data urls.
What Base64 gives you: survives text-only systems, universally supported and simple and reversible.
Where PDF falls short: hard to edit after creation, reflows poorly on small screens and extracting clean text can be tricky. Converting keeps your content while moving to a format that matches where the file is going.
Tips for the best results
- Base64 is lossless, so your converted files keep every detail of the original PDF.
- You can convert several files in one go — add as many PDF files as you like and download them together.
- Everything runs locally in your browser, so even large files convert quickly and nothing is uploaded.
PDF to Base64 — frequently asked questions
- How do I convert PDF to Base64?
- Add your PDF file, click Convert to Base64, and download the Base64 result. The whole process happens in your browser and takes just a few seconds.
- Is it free to convert PDF to Base64?
- Yes. This PDF to Base64 converter is completely free with no sign-up, no watermarks and no limit on the number of files you can convert.
- Are my PDF files uploaded to a server?
- No. Conversion runs entirely on your device using your browser, so your files never leave your computer or phone.
- Does converting PDF to Base64 reduce quality?
- No. Base64 is a lossless format, so the conversion preserves the full quality of your original PDF.
- Can I convert multiple PDF files at once?
- Yes. Add as many PDF files as you like and convert them in a single batch, then download each Base64 result.