How do I fix: 🔍 Why This Happens?

The main reason for this error is that the `btoa()` function in Google Chrome cannot handle characters outside of the Latin1 range. This is a known limitation of the `btoa()` function in older versions of Chrome.Another possible cause could be the presence of non-ASCII characters in the XML file bei

How do I fix: Using a Different Base64 Encoding Method?

Step 1: Consider using a different base64 encoding method, such as `Buffer.from()` or `TextEncoder` API, which may be able to handle non-ASCII characters.Step 2: Explore alternative libraries or modules that provide more robust base64 encoding capabilities.Step 3: Test the modified code with the new

Software⏱️ 3 min read📅 2026-06-03

How to Fix: Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range.

Q: Step-by-Step Verified Fixes Base64 Encoding using ASCII Characters Only?

Step 1: Replace all non-ASCII characters in the XML file with their corresponding ASCII equivalents.Step 2: Use a character encoding conversion tool or manually replace each non-ASCII character with its ASCII representation.Step 3: Verify that the modified XML file can be successfully base64 encoded

Base64 encoding issue in Google Chrome due to non-Latin1 characters in XML string.

Quick Answer: Use a different encoding method or escape special characters before base64 encoding.

📋 Table of Contents

🔍 Why This Happens
🛠️ Step-by-Step Verified Fixes
🎯 Final Words

The error 'Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range' is thrown only in Google Chrome, according to your tests. This issue occurs when you're base64 encoding a large XML file so that it can be downloaded.

This error is actually quite frustrating because normally, Google Chrome does not exhibit this behavior.

🔍 Why This Happens

The main reason for this error is that the `btoa()` function in Google Chrome cannot handle characters outside of the Latin1 range. This is a known limitation of the `btoa()` function in older versions of Chrome.
Another possible cause could be the presence of non-ASCII characters in the XML file being encoded.

🛠️ Step-by-Step Verified Fixes

Base64 Encoding using ASCII Characters Only

Step 1: Replace all non-ASCII characters in the XML file with their corresponding ASCII equivalents.
Step 2: Use a character encoding conversion tool or manually replace each non-ASCII character with its ASCII representation.
Step 3: Verify that the modified XML file can be successfully base64 encoded and downloaded without errors.

Using a Different Base64 Encoding Method

Step 1: Consider using a different base64 encoding method, such as `Buffer.from()` or `TextEncoder` API, which may be able to handle non-ASCII characters.
Step 2: Explore alternative libraries or modules that provide more robust base64 encoding capabilities.
Step 3: Test the modified code with the new encoding method to ensure it resolves the issue.

🎯 Final Words

To resolve this error, you can either replace non-ASCII characters in the XML file with their ASCII equivalents or use a different base64 encoding method. By following these steps, you should be able to successfully download the encoded XML file without errors in Google Chrome.

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