What is Base64 encoding?

Base64 turns arbitrary text or binary data into a string made only of letters, digits, +, /, and = padding, so it can safely travel through systems that only handle plain text, like email or a URL query string.

What is "URL-safe" Base64?

Standard Base64 uses + and /, which have special meaning in a URL. URL-safe Base64 replaces them with - and _ and drops the = padding, so the result can be used directly inside a URL without extra encoding.

Does this handle special characters and emoji?

Yes. Text is encoded as UTF-8 before being converted to Base64, so accented letters, Polish characters, and emoji round-trip correctly.

Why does decoding sometimes show an error?

Decoding fails if the text is not valid Base64, or if the URL-safe toggle does not match how the text was originally encoded.

Is my data stored anywhere?

No. Everything is encoded and decoded entirely in your browser and nothing is sent to a server.

DAILYTOOLER

Base64 encode / decode

Encode or decode Base64, live as you type, with full UTF-8 support and an optional URL-safe mode, entirely in your browser.

URL-safe (use - and _ instead of + and /, no padding)

Plain text

Base64

What is a Base64 encoder and decoder?

Edit either field and the other updates instantly: type plain text to see its Base64 form, or paste Base64 to see it decoded back, including full UTF-8 support for accented and non-Latin characters.

Base64 encode / decode

What is a Base64 encoder and decoder?

Frequently asked questions