Base64 Encoder Online — Encode UTF-8 Text
Encode Unicode and UTF-8 text to Base64 online in your browser. Create Base64 values for APIs, data fields and development tasks without uploading text.
About this tool
This encoder converts text to UTF-8 bytes and represents those bytes with the standard Base64 alphabet. Base64 is an encoding format for transporting binary data as text; it is not encryption and does not protect secrets.
How to use
- Enter or paste the Unicode text to encode.
- Select Convert to generate the Base64 representation.
- Copy the encoded value into the destination that expects Base64 text.
Features
- Handles international Unicode text through UTF-8 encoding.
- Produces standard padded Base64 output.
- Processes text locally with immediate copyable output.
Common use cases
- Prepare text values for APIs, test fixtures or configuration.
- Create Basic Authentication credentials for development testing.
- Inspect how UTF-8 text is represented in Base64.
Common issues and tips
- Base64 increases data size and should not be used as compression.
- Base64 is reversible; never treat an encoded password or token as encrypted.
Privacy
Text encoding happens locally in your browser and the input is not uploaded.
Frequently asked questions
Is Base64 encryption?
No. Anyone can decode Base64 without a key. Use proper encryption when confidentiality is required.
Why does Base64 sometimes end with = characters?
The equals signs are padding used to align the final encoded block. One, two or no padding characters can be valid.
Does this encoder support Chinese and emoji?
Yes. Text is converted to UTF-8 bytes before Base64 encoding, so Unicode characters are preserved.