How do I decode Base64 to a file?

Paste the complete value or open the local text file containing it, then choose Download decoded file. The original file format is restored without transcoding. A header or data URI label suggests an extension; enter a filename such as result.xlsx when you know the original format.

Why does the output say binary data rather than text?

The decoded bytes are not valid UTF-8. They can still be downloaded intact, rather than replaced with placeholder characters. For text encoded as UTF-16 or another character set, interpret the downloaded bytes in an application that supports that encoding.

Can this decode Base64 images, PDFs or wrapped strings?

Yes, when the value represents those original file bytes. PNG, JPG, GIF and WebP can show a raster preview. SVG, PDF, ZIP, Office files and other bytes are offered as downloads. Whitespace and MIME line wrapping are ignored as one payload; multiple independent values, gzip streams, QR content and encrypted data are not unpacked or decrypted.

Base64 Decoder

This page opens Decode for a Base64 payload or a ;base64 data URI. Read valid UTF-8 text, inspect supported raster images, or download every decoded byte as a file. Open an encoded local text file when the value is too awkward to paste. Both alphabets and optional padding are accepted.

Inputdecode

Output

Converted output appears here.

Direction

Alphabet

Encoding options: Omit = paddingWrap at 76 (MIME)

Auto is a guess based on decoded UTF-8 text. Select Encode to treat a Base64-looking string as literal text, or Decode for binary files. Both alphabets and omitted padding are accepted when decoding. Dropping a file encodes its original bytes.

Common questions

How do I decode Base64 to a file?: Paste the complete value or open the local text file containing it, then choose Download decoded file. The original file format is restored without transcoding. A header or data URI label suggests an extension; enter a filename such as result.xlsx when you know the original format.
Why does the output say binary data rather than text?: The decoded bytes are not valid UTF-8. They can still be downloaded intact, rather than replaced with placeholder characters. For text encoded as UTF-16 or another character set, interpret the downloaded bytes in an application that supports that encoding.
Can this decode Base64 images, PDFs or wrapped strings?: Yes, when the value represents those original file bytes. PNG, JPG, GIF and WebP can show a raster preview. SVG, PDF, ZIP, Office files and other bytes are offered as downloads. Whitespace and MIME line wrapping are ignored as one payload; multiple independent values, gzip streams, QR content and encrypted data are not unpacked or decrypted.

Encoding preserves valid UTF-8 text or the original file bytes. Decoding restores those bytes; invalid UTF-8 is kept as binary data for download. Auto direction and inferred file types are best-effort guesses, and no file-format conversion or validation is performed.