Base64 Encoder and Decoder
Encode and decode data easily with our free Base64 encoder and Base64 decoder. Quickly Base64 encode, Base64 decode, and use the Base64 encoder decoder as a convenient Base64 converter. Our tool supports Base64 encode online, Base64 decode online, and works as an online Base64 encoder and online Base64 decoder. Convert text to Base64 whenever you need text to Base64 encoding for development, testing, or data transfer. Wondering how do I encode text to Base64, how do I decode Base64, or how do I convert Base64 to text? Enter your data and encode or decode it instantly.
How to use the Base64 Encoder and Decoder
- Choose Encode or Decode.
- Enter your text or Base64 string.
- Copy or download the result.
Base64 Encoder and Decoder features and limits
- UTF-8 safe, so accented letters and emoji work
- Clear error for malformed Base64
- Limitation: text only; file encoding is not included in this version.
How the Base64 Encoder and Decoder works
Text is converted to UTF-8 bytes and then to Base64 with the browser’s btoa; decoding reverses those steps.
Privacy and browser processing
Your input is processed locally in this page and is not uploaded or stored by Best Web Tools. Your hosting provider may still keep ordinary server logs for page requests.
Frequently asked questions
Is Base64 encryption?
No. It is a reversible encoding and offers no secrecy.
Why is decoding failing?
The input may contain characters outside the Base64 alphabet or be truncated.
What is Base64?
Base64 represents binary or text data using 64 printable characters. It is common in data URLs, email attachments and API tokens.
Can I decode Base64 to a file?
Not in this version. The tool works with text only.
Related tools
Browse all Developer Tools or return to the Best Web Tools homepage.
Why use the Base64 Encoder and Decoder?
Base64 appears in data URLs, email attachments and tokens. Being able to quickly decode a string helps when debugging, but remember that anyone can decode it, so never treat it as protection for sensitive data.