No. Encoding happens in your browser with the built-in encoder; nothing is sent to a server.

Base64 Encoder - Convert Text to Base64, UTF-8 Safe

Plain Text Input

Base64 Output

What is Base64 encoding?

Base64 encoding converts binary data into 64 printable ASCII characters so it can travel safely through systems that expect text, such as email bodies, JSON fields, and data URLs. Base64 is an encoding, not encryption - anyone can decode it, so it protects nothing.

Runs in your browser. Your files and text never leave your device - nothing is uploaded.

Why use Base64 Encoder?

Base64 solves a specific problem: how to move binary or non-ASCII data through channels that only reliably handle plain text, such as JSON fields, URLs, email headers, and HTML attributes. It maps every three bytes onto four printable ASCII characters drawn from A-Z, a-z, 0-9, plus, and slash, which is why the output is about a third larger than the input. This encoder is UTF-8 aware. Plain btoa in the browser breaks on characters above the Latin-1 range, so the tool first converts your text to UTF-8 bytes, meaning accented letters, non-Latin scripts, and emoji all round-trip correctly. If your pasted text contains a broken character, usually half of an emoji left over from a truncated copy, the tool shows a clear message instead of failing silently. Keep one rule in mind: Base64 is reversible by anyone. It is a transport format, not a security measure. It is the right tool for inlining a small image as a data URI or building an Authorization header, and the wrong tool for protecting anything sensitive.

Key benefits

UTF-8 safe, accented characters and emoji encode correctly
Instant, live encoding as you type
Runs client-side, your input never leaves the browser
Useful for data URIs, MIME email parts, and config values

Features

Handles full Unicode text via UTF-8 before encoding
Live output with one-click copy
No length limit beyond browser memory

Popular use cases

Creating a data: URI to inline a small SVG or font
Encoding a value to embed in JSON, YAML, or an env variable
Preparing a string for an HTTP Basic Authorization header
Generating MIME-encoded content for an email payload

How to use Base64 Encoder

1
Enter your text
Type or paste the text you want to encode into the input box.
2
Read the Base64
The encoded Base64 string appears instantly in the output panel.
3
Copy the result
Click "Copy Base64" to copy the encoded string to your clipboard.
4
Clear and start over
Click "Clear" to empty the input box and encode something new.

What is Base64 encoding?

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