Base64 File Decoder
Paste Base64 or a data URI and get the original file back.
—Detected type
—File size
—File name
● Your files are processed locally in your browser and are not uploaded to our servers.
How it works
The text is cleaned (spaces, line breaks and the data URI prefix are removed; URL-safe Base64 with - and _ is accepted), decoded to bytes, and the file type is detected from its signature to choose the right extension. Images, text and PDFs are previewed before you download.