PDF to Base64
Encode a PDF as Base64 text.
Convert any PDF into a Base64 string — a text-safe encoding used by APIs, email systems, databases and configuration files. Download the encoded text and paste it wherever a Base64 PDF payload is expected, or use it with the Base64 to PDF tool to decode it back.
Your files are processed locally in your browser. Nothing is uploaded to a server, ever.
Tip
Drop your file here or click to browse. Everything is processed on this device — nothing is uploaded.
Quick answers
- What does this tool do?
- Encode a PDF as Base64 text. Convert any PDF into a Base64 string — a text-safe encoding used by APIs, email systems, databases and configuration files. Download the encoded text and paste it wherever a Base64 PDF payload is expected, or use it with the Base64 to PDF tool to decode it back..
- Is it free?
- Yes — free and unlimited, with no account required and no watermark on the result.
- What files are supported?
- PDF files, up to 100 MB each.
- Where is my file processed?
- Entirely in your browser. Your file never leaves your device — nothing is uploaded to a server.
- What are the limitations?
- Base64 output is about 33% larger than the original file. Very large PDFs produce very large text files.
- What happens if processing fails?
- You get a clear message explaining what went wrong and how to fix it (try another file, check the format, or start over). Your original file is never touched.
How to PDF to Base64
- Upload a PDF.
- Process to encode it as Base64.
- Download the .txt file with the encoded string.
Frequently asked questions
Common problems and fixes
- The output has empty or missing text
Why: the source pages were a scan or an image — there is no text layer to convert.
Fix: run the OCR PDF tool on the file first to add a searchable text layer, then convert again.
- Tables and columns come out jumbled
Why: a PDF stores positions on a page, not rows and cells, so designed layouts are reconstructed approximately.
Fix: for data you need in a spreadsheet, use the Extract Tables tool instead — it is built for that job.
- Fonts look slightly different in the converted file
Why: a PDF embeds glyph shapes rather than font families, so the closest available font is substituted.
Fix: expect near-identical text flow rather than pixel-perfect type; fix fonts in the target app if exactness matters.
Who uses PDF to Base64?
- Students and researchers — turning readings, papers and handouts into editable notes they can annotate and quote from.
- Office teams — reusing content from reports and statements without retyping it by hand.
- Anyone handling confidential documents — the conversion runs in your browser, so contracts and financial files never leave your device.