Base64 to File Decoder

Paste Base64, choose a filename and MIME type, validate the bytes, and create a local Blob download without uploading data.

Base64

Decoded byte preview (hex, first 256 bytes)

Filename

MIME type

ReadyBase64 carries bytes, not a reliable original filename or MIME type; choose those explicitly before download.

How to use this Base64 to File Decoder

Decode Base64 bytes into a downloadable local file. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.