● Encoding

Base64 Encoder

Encode plain text or UTF-8 Unicode strings into Base64.

Processed locally. Your input stays in this browser.

Zero Data Sent

Plain Text Input (UTF-8 Safe)

1 line•36 chars•38 B

Ctrl/Cmd+Enter run

Base64 Encoded Result

SGVsbG8gV29ybGQhIPCfmoAgRmFzdCBEZXZlbG9wZXIgVG9vbHM=

1 line•52 chars•52 B

Read-only output

What Base64 Encoder Does

Encode text strings to Base64 with full UTF-8 Unicode support.

How It Works

1.Enter plain text, source code, or UTF-8 Unicode characters.
2.The encoder processes text using TextEncoder and btoa with full UTF-8 support.
3.Copy or download the Base64 encoded string.

Common Use Cases

•Encoding authorization credentials for Basic Auth headers.
•Embedding small images or data URIs in HTML/CSS.
•Safely transmitting non-ASCII strings over binary-restricted channels.

Related Developer Guides

Base64 Encoding Explained: How Binary-to-Text Encoding Works

Deep dive into Base64 encoding. Understand 6-bit binary translation, Base64 character index tables, padding with =, URL-safe Base64, and UTF-8 string encoding.

Read Guide

Frequently Asked Questions

Does this support emojis and international text?

Yes! It uses TextEncoder to convert UTF-8 characters into bytes before encoding.

Popular Next Tools

Base64 Decoder

Decode Base64 encoded strings back into UTF-8 plain text.

URL Encoder

Encode URLs or query string parameters to percent-encoded format.