Not detecting as PDF?

Ensure the string is complete and not HTML-escaped. Try Decode on the hub and check Detected type.

Base64 to PDF Online — decode & download

Base64 to PDF

Paste Base64 to recover a PDF — Decode mode with download. Inline preview uses the browser’s PDF viewer when available.

“Base 64 to pdf” is the reverse of PDF→Base64 — common when an API returns a document as a Base64 field.

Modern browsers can show PDFs in an iframe from a Blob/Data URI. If preview fails, download still works when magic bytes are `%PDF-`.

Buffer.from("hello").toString("base64");
Buffer.from(b64, "base64").toString("utf8");

btoa(unescape(encodeURIComponent(text)));
decodeURIComponent(escape(atob(b64)));

import base64
base64.b64encode(b"hello").decode()  # aGVsbG8=
base64.b64decode("aGVsbG8=").decode()

const uri = `data:image/png;base64,${b64}`;
// <img src={uri} /> or CSS url('${uri}')

This is one direction of Base64 Studio. The editor is the same; the title and default direction match this search.