UTF-8 Base64
Free online utf8 base64 tool. Browser-based, private, no uploads.
Input Text
Conversion Options
Specialized Actions
Related reading
UTF-8 Base64
Encode UTF-8 text, including emoji and accented characters, to Base64.
Why it matters: UTF-8 mode prevents mojibake when non-Latin text is encoded.
How to use Base64
- 1 Type or paste your text into the input box above.
- 2 Click Encode to turn text into Base64, or Decode to convert it back.
- 3 Toggle URL-safe mode for links, or UTF-8 for emoji and accents.
- 4 Use JWT / API-key / JSON modes for developer workflows.
- 5 Copy the result or open a specialized tool from the hub below.
Frequently Asked Questions
Standard Base64 works on bytes. If you paste emojis or accented chars without UTF-8 handling, they may break or turn into question marks.
Yes! Our tool correctly encodes multi-byte UTF-8 characters like 😀 or ñ into valid Base64 strings. Encoding and decoding happen entirely in your browser, so your text never leaves your device. The tool supports standard, URL-safe, and UTF-8 Base64 modes.
Most modern systems (JS, Python, Java) handle UTF-8 by default. Legacy systems might require explicit UTF-8 configuration.
Slightly. Multi-byte characters (like emojis) take up more bytes in UTF-8, resulting in a longer Base64 string compared to simple ASCII.
Yes. There is no charge, no account, and no watermark on the output. Encoding and decoding happen entirely in your browser, so your text never leaves your device. The tool supports standard, URL-safe, and UTF-8 Base64 modes.
All Base64 Tools
Encode, decode, and inspect Base64 for web, APIs, and JWTs.
Formats
No tools match your filter.
Related Tools
Explore other text utilities: