Base64 Encoder & Decoder
Convert UTF-8 text to Base64 or decode Base64 data locally in your browser.
Encode and decode Base64 online
Base64 represents binary or text data using printable ASCII characters. It is commonly used in APIs, data URLs and email attachments.
Base64 is an encoding format, not encryption, and should not be used to protect secrets.
How to use the Base64 Encoder & Decoder
- Paste or select the source value in the expected format.
- Choose the conversion direction or output format and run the conversion.
- Review and copy the converted value, then verify it in the receiving application.
Practical example
Use a small known sample first so you can compare the output before processing a larger value.
What this tool cannot guarantee
The result reflects the supplied input and browser implementation; project-specific syntax and runtime behavior still require testing.
Continue this workflow with the URL Encoder & Decoder
Frequently asked questions
Is Base64 secure?
No. Anyone can decode Base64 data, so it must not be treated as encryption.
Does this tool upload my input?
No. Encoding and decoding happen locally in your browser.