Base64 to Excel

🚀 Instantly convert Base64 strings into downloadable Excel files. Perfect for API responses and data transfers involving encoded spreadsheets.

✅ 100% Free🔓 No Login Required⚡ Instant Online Tool

Instant Processing

100% Browser-Side

No File Size Limits

Base64 Input

0 characters

Output File Name

.xlsx

Conversion Status

Your .xlsx file will be downloaded here

Paste a Base64 string and click Convert & Download

Download Preview

output.xlsx

🔧 How It Works

Simple, fast, and secure Base64 to Excel conversion in just a few steps

Paste Base64 String

Enter or paste your Base64-encoded Excel data into the input box — data URIs are also supported

Set File Name

Optionally set a custom file name for your downloaded Excel file before converting

Download Excel File

Click 'Convert & Download' and your .xlsx file will be decoded and saved instantly

Frequently Asked Questions

Everything you need to know about converting Base64 to Excel

Do I need to sign up or log in to use this tool?

No. All QuickTextTools are completely free to use online with no login, signup, or account required.

What is a Base64-encoded Excel file?

A Base64-encoded Excel file is an .xlsx file that has been converted into a text string using Base64 encoding. This is commonly used in APIs, emails, and data transfers to transmit binary files as plain text.

How do I get a Base64 string for my Excel file?

Base64 strings for Excel files are typically returned by APIs, generated by server-side scripts, or found in email attachments encoded as MIME parts. You can also use any Base64 encoder tool to encode an .xlsx file.

Does this tool support data URI format?

Yes. If your Base64 string starts with 'data:application/...;base64,', the tool automatically strips the prefix and processes just the Base64 data.

Is my data safe? Does it get uploaded anywhere?

Absolutely. All processing happens entirely in your browser. Your Base64 data never leaves your device and is never sent to any server.

What if I get an error about invalid Base64?

Ensure there are no extra spaces, line breaks, or special characters in your Base64 string. Only the characters A–Z, a–z, 0–9, +, /, and = (for padding) are valid in a Base64 string.