QUICKTOOLS GUIDE
What Base64 Is and Is Not
Understand Base64 encoding, its common uses, and why it should never be treated as encryption.
In this guideBase64 maps binary data to a text-friendly alphabet.It can be useful for transporting data through text-oriented systems.Encoding is reversible and therefore does not provide secrecy.
The key ideas
- Base64 maps binary data to a text-friendly alphabet.
- It can be useful for transporting data through text-oriented systems.
- Encoding is reversible and therefore does not provide secrecy.
How the calculation or process works
If someone can decode a Base64 string, they can recover the original bytes. Use encryption when confidentiality is required; Base64 can then be used as a transport representation if the protocol calls for it.
Common mistakes
- Calling Base64 encryption.
- Putting passwords or secrets into Base64 and assuming they are protected.
- Ignoring the size increase introduced by the encoding.
Use the related QuickTools utility
Once you understand the method, the QuickTools Base64 Is and Is Not page can handle the repetitive part of the task.
Important: A general guide explains a method; it does not know the rules, assumptions, or requirements of a particular business, contract, institution, or software system. Check those requirements when they matter.