Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to readable text. Supports UTF-8.
Tool guide
About Base64 Encoder & Decoder
Base64 is commonly used to represent binary or Unicode text as plain ASCII characters. This encoder and decoder is useful for API testing, tokens, data URLs, email content, and small configuration values.
The implementation supports UTF-8 text, so non-English characters and emoji can be encoded and decoded more reliably than older browser snippets based on deprecated escape/unescape helpers.
Common use cases
- Encode small text snippets for API requests.
- Decode Base64 values found in logs or configuration.
- Check whether a copied Base64 value decodes to readable text.
- Work with Unicode strings without losing characters.
Practical tips
- Base64 is encoding, not encryption.
- Do not use Base64 alone to protect secrets.
- If decoding fails, check for missing padding or copied whitespace.
Related tools
Frequently asked questions
Is Base64 secure?
No. Base64 only changes the representation of data. Anyone can decode it without a password.
Why does my Base64 string not decode?
The input may be truncated, contain unsupported characters, or use a different variant such as Base64URL.
Can I encode Unicode text?
Yes. The tool uses UTF-8 encoding so international text and emoji are supported.
Is Base64 Encoder & Decoder free to use?
Yes. Base64 Encoder & Decoder is free to use in your browser with no signup required.
Is my data uploaded when I use Base64 Encoder & Decoder?
Most FreeTools utilities process data locally in your browser. Tools that call third-party services, such as IP lookup and advertising, are disclosed in the privacy policy.
What can I use Base64 Encoder & Decoder for?
Free online Base64 encoder and decoder. Convert text to Base64 and decode Base64 to text. Supports UTF-8. No signup needed.