Base64 to PDF Converter
Convert Base64 to PDF online in seconds. Paste a Base64-encoded PDF or plain text, drop in a .txt file, and we'll decode and preview the PDF online — no uploads, no sign-up.
Drag and drop a .txt file, upload one, or paste Base64 directly
Base64 to PDF, decoded online
Got an API response that returns a PDF as a Base64 string, or a byte array you need to inspect? Paste it above and this converter will base64 decode the bytes into a real PDF file you can open or download. Both raw Base64 and data:application/pdf;base64,... data URIs are detected automatically.
Whether you need to convert Base64 to PDF online for a quick API debugging session, decode a Base64 string pulled from a database column, or turn an encoded byte array back into a real file, the entire workflow runs online. No signup, no upload, no server round-trip — just paste, decode, and download.
Need the reverse? Use our PDF to Base64 tool to encode a PDF file as a Base64 string for embedding in JSON payloads, email attachments, or database fields.
How to convert Base64 to PDF
Three steps, all running online — no signup, no upload required.
Paste your Base64
Drop in the raw Base64 string, a full data URI, or upload a .txt file. Byte arrays copied from API responses work too.
Hit convert
We base64 decode the input locally, detect whether the result is a PDF or plain text, and render the output as a downloadable file.
Preview and download
See the PDF inline before saving, open it in a new tab, or save it to disk — your data never leaves the page.
Every flavor of Base64 we handle
“Base64” can mean a few different things depending on where it came from. This converter normalizes the most common forms so you don't have to massage the input first.
- Raw Base64 strings — the standard A–Z, a–z, 0–9,
+and/alphabet, with or without padding. - URL-safe Base64 — variants that swap
+and/for-and_. - Data URIs — full
data:application/pdf;base64,...strings, with the prefix stripped automatically before decoding. - .txt file uploads — drag a text file containing the Base64 payload onto the input area; the file itself never leaves your device.
- Base64-encoded text— if the decoded bytes aren't a PDF, we treat them as UTF-8 text and lay them out into a fresh PDF for you.
When you'll reach for this tool
A few of the situations where converting Base64 to PDF online is the quickest path to an answer:
- Debugging API responses — backends often return generated PDFs (invoices, receipts, signed agreements) as a Base64-encoded field. Decode them here without writing a one-off script.
- Inspecting stored documents — if a database column or object-store value holds a PDF as base64, paste the string in to see what's actually inside.
- Verifying email and webhook attachments — files transferred through JSON or SMTP often arrive as Base64. Decode them to confirm the document before forwarding.
- Building and testing software — turn fixture data, regression test inputs, or sample byte arrays into real PDFs online, without touching the command line.
- One-off byte to PDF conversions — when someone hands you a Base64 blob and asks “what is this?”, paste it in and find out in seconds.