File to Base64 Encoder

Choose a file, read its bytes in the browser, inspect size and MIME type, then copy the RFC 4648 Base64 output.

Local file

—File name

—Source bytes

—Browser MIME

—Base64 chars

Choose a fileReads local bytes with the File API. The file is not uploaded. Images already have a dedicated Image to Base64 page.

How to use this File to Base64 Encoder

Encode any local file into raw Base64 without uploading it. 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.