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Word to Base64 Encoder

Convert a Word .docx file to a Base64 string. Runs in your browser.

Word to Base64 encodes a DOCX or DOC file into a Base64 string. ConvertDa's free Word to Base64 tool runs in your browser — useful when you need to embed a Word document in a JSON API call or attach it inline in an email.

How to word → base64

  1. 1

    Drop your .docx file into the box.

  2. 2

    Copy or download the Base64 string.

Frequently asked questions

Are .doc (legacy) files supported?▾

Yes — any binary file can be Base64-encoded; only the MIME label differs.

Which MIME type does the data URI use?▾

DOCX files use 'application/vnd.openxmlformats-officedocument.wordprocessingml.document'. DOC files use 'application/msword'. Both are added automatically when the data URI prefix is enabled.

Can I encode multiple Word docs at once?▾

The tool handles one file at a time to keep the output unambiguous. Run the tool once per file, then concatenate the strings if needed.

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