Base64 Encoder
Encode text to Base64 online. Supports full Unicode text, not just plain ASCII.
Your text is encoded entirely in your browser. Nothing is sent to a server.
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How to use this tool
- 1Type or paste the text you want to encode.
- 2The Base64 result appears automatically below as you type.
- 3Copy the result or download it as a .txt file.
Features
- Encodes as you type — no button to click.
- Full Unicode support (accents, CJK characters, emoji), not just plain ASCII.
- Copy result to clipboard, or download as a .txt file.
- No account or sign-up required.
Privacy
Your text is encoded entirely in your browser. It is never sent to a server, logged or stored.
Frequently asked questions
Is this Base64 encoder free?
Yes. You can encode unlimited text for free, with no sign-up required.
What is Base64 encoding used for?
Base64 turns arbitrary text or binary data into a string of printable characters. It is commonly used to embed data in URLs, JSON, emails and data: URIs.
Does it support non-English text?
Yes. Unlike the raw browser btoa() function, this tool correctly handles full Unicode text — accented letters, Chinese/Japanese/Korean characters and emoji — not just plain ASCII.
Is my text sent to a server?
No. Encoding happens locally in your browser using native JavaScript APIs.