Is Base64 encryption?
No. Base64 is only an encoding; anyone can decode it. It does not protect secrets.
What is URL-safe Base64?
A variant that uses - and _ instead of + and / and drops the trailing = padding; JWTs use this form.
Base64 / URL Encode
Encode or decode text as Base64, URL or HTML entities; non-ASCII characters are handled correctly as UTF-8. Runs entirely in your browser.
Type plain text on the left and press Encode, or encoded text on the right and press Decode. Non-ASCII text is handled as UTF-8.