Base64 Encoder
Encode text to Base64 online for free — correctly handles Vietnamese, emoji, and other Unicode text. Nothing uploaded to a server.
Your files are processed locally in your browser and are not uploaded to our servers.
How to use Base64 Encoder
- 1
Type or paste text into the box.
- 2
Click "Encode to Base64."
- 3
Copy or download the result.
Common uses
- Encoding a value for a data URL, an API header, or a config file
- Preparing binary-safe text for a system that only accepts Base64
- Encoding non-English text where a naive Base64 implementation would corrupt it
Supported formats and limitations
Accepts text, up to one file at a time.
- Base64 is an encoding, not encryption — it hides content from a casual glance but provides no actual confidentiality, since it requires no key to reverse.
- Encoding text (not raw binary files) is what this tool is built for — for encoding an image or other binary file, use a tool built for that specific format.
Frequently asked questions
Yes — encoding goes through proper UTF-8 byte conversion first, so any Unicode text round-trips correctly rather than corrupting.
No — Base64 is an encoding, not encryption. It has no key or secret; anyone can decode it instantly. Don't use it to protect sensitive information.
No. Encoding happens entirely in your browser.
This tool encodes text you paste or type — for encoding a binary file, a format-specific tool is a better fit.