Practical guide
How to use Base64 Encoder
Base64 Encoder converts UTF-8 text to Base64 and back. It is useful for inspecting encoded configuration values, small data fields, and URL-safe tokens where the content is encoding—not encryption.
Step by step
- Enter plain text and encode it, or paste Base64 and decode it.
- Enable URL-safe mode when the value uses - and _ instead of + and /.
- Review the decoded text before using it in a configuration or request.
Example
Input
Hello, 77 Toolkit!Result
SGVsbG8sIDc3IFRvb2xraXQhHow it works
The browser first converts text to UTF-8 bytes, then maps those bytes to the Base64 alphabet. URL-safe mode substitutes characters that have special meaning in URLs and can omit padding.
Important limitations
- Base64 does not hide or secure information.
- The text decoder expects valid UTF-8 and may reject arbitrary binary data.
Frequently asked questions
Is Base64 encryption?
No. Anyone can decode it without a password or key.
Why does encoded text become longer?
Base64 represents every three bytes with four characters, so size normally increases by roughly one third.