Frequently Asked Questions
What does this tool encode?
This tool encodes text to Base64 format using JavaScript's btoa() function. For Base64 decoding, use the Base64 Decode tool. For URL encoding/decoding, see URL Encode and URL Decode.
Can this help with API debugging?
Yes. Base64-encoded values appear in HTTP Basic Auth headers, JWT tokens, and JSON payloads. This tool lets you quickly encode values to verify their Base64 form.
Is my data uploaded anywhere?
No. All encoding happens in-browser using JavaScript's built-in btoa() function.
Example input/output
Input: Hello, World!
Output: SGVsbG8sIFdvcmxkIQ==
How it works
This tool uses JavaScript's built-in btoa() function to encode your text to Base64. For non-ASCII characters, the input is first UTF-8 encoded using TextEncoder before applying Base64 encoding. All processing runs in your browser.
Common use cases
- Encode credentials for HTTP Basic Authentication headers
- Embed small images as Base64 data URLs in HTML or CSS
- Encode binary data for inclusion in JSON or XML payloads