Question 1

Is my text uploaded anywhere?

Accepted Answer

No. Encoding and decoding run entirely in your browser using native APIs. Nothing is sent to a server, logged, or stored.

Question 2

What's the difference between Base64 and Base64URL?

Accepted Answer

Base64URL replaces + with -, / with _, and drops trailing = padding so the result is safe to use in URLs and JWT segments. Standard Base64 is for binary-safe text encoding.

Question 3

When should I use URL encoding?

Accepted Answer

Whenever you put user data, spaces, or special characters into a URL — query strings, path segments, or form data. URL encoding (percent-encoding) keeps the URL valid.

Question 4

Does this handle Unicode?

Accepted Answer

Yes. Both Base64 and URL encoding here support full Unicode, including emoji and non-Latin scripts.

Base64 & URL Encoder / Decoder

What it does

Base64

Base64URL

URL encoding

Frequently Asked Questions