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Base64 Encode

Turn any text into Base64, with correct handling of accents and emoji.

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How to use Base64 Encode

Paste or type your text.
Tick URL-safe if the result goes into a URL or a token.
Copy the Base64 string.

About Base64 Encode

Base64 represents binary data using 64 letters, digits and two symbols, so it can pass through systems that only handle text: email, JSON, HTML data URIs, HTTP headers. It is not encryption. Anybody can decode it, so never use it to hide a secret.

Text is converted to UTF-8 bytes first, so accents, Turkish letters and emoji survive the round trip. The URL-safe variant swaps + and / for - and _ and drops the padding, which is what JWTs and many web APIs use.

Frequently asked questions

Is Base64 encryption?

No. It is a reversible encoding with no key. Anyone can decode it in a second.

Why is the output about a third bigger?

Every three bytes of input become four characters of output. The overhead is 33 percent, plus a bit for padding.

What is URL-safe Base64?

A variant defined in RFC 4648 that replaces + with - and / with _ and often leaves out the = padding. It is safe to use in URLs and file names without further escaping.

Why do other tools give a different result for accents?

Some tools encode the characters as Latin-1 bytes. This tool uses UTF-8, which is what nearly every modern system expects.

Where do I find Base64 used in practice?

Basic authentication headers, data URIs for small images, JWT tokens, email attachments, and the data field of Kubernetes secrets.

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