What is Base64?
Base64 is a way of representing binary or text data using only 64 printable ASCII characters (A–Z, a–z, 0–9, + and /). It lets data that might otherwise be corrupted travel safely through systems built for text, such as email and URLs.
What this tool does
Paste text to encode it into Base64, or paste a Base64 string to decode it back to readable text. The conversion is instant and fully Unicode-aware.
Where Base64 is used
- Embedding images directly in HTML or CSS (data URIs)
- Encoding attachments in email (MIME)
- Storing or transmitting credentials and tokens
- Safely passing binary data in JSON or URLs
How to use it
- Paste your text or Base64 string.
- Choose encode or decode.
- Copy the result.
Is Base64 encryption?
No — this is a critical point. Base64 is encoding, not encryption. Anyone can decode it, so never use it to protect passwords or secrets. It only changes the representation of data, not its secrecy.