What Excel formats are supported?

The tool supports both XLS and XLSX spreadsheet files.

Can I use the result in API requests?

Yes. The generated Base64 string can be used in API payloads and data exchange workflows.

Do I get file information too?

Yes. The result includes file size and detected mime type information.

Excel to Base64 Converter

Convert Excel spreadsheets into Base64 strings that are easier to send through APIs and structured payloads.

Quick answer

Excel to Base64 Converter lets you encode Base64 content online. Use it for file transport, API payloads, previews, or restoring downloadable files from Base64 text.

XLS and XLSX filesSupported input for this page.

Raw Base64 string with file informationOutput returned after processing.

10MB / 25MB / UnlimitedGuest, Registered, and Pro plan limits.

Excel to Base64 Converter

Upload your spreadsheet, click Encode, then copy or download the Base64 output.

5 free tries on this tool

Drop files here

Select file

Paste Base64

How it works

Upload your spreadsheet, click Encode, then copy or download the Base64 output.

FAQ

What input is supported?

XLS and XLSX files.

What result do I get?

Raw Base64 string with file information.

Is this free to use?

Yes. Guest and registered users can use the tool within their daily per-tool tries and file-size limits.

Tool notes

Guest users can process files up to 10MB.
Registered users can process files up to 25MB.
Pro users have unlimited file size.
Every page uses the same job queue, storage, and download workflow.