Base64 Encoder and Decoder

What Base64 Encoder and Decoder does

Encode text as Base64 or decode valid Base64 into readable text using the selected character encoding.

Worked example

How it works

Base64 groups binary data into six-bit values and represents them with printable characters. Decoding reverses that representation; it does not decrypt or validate the meaning of the data.

Developer workflows

• Prepare API and test payloads
• Inspect encoded configuration values
• Represent small binary values as text

Security and compatibility checks

• Base64 is encoding, not encryption or access control.
• Encoded output is usually about one third larger than the source bytes.
• Text encoding must match when converting bytes back to characters.

Frequently asked questions

Is Base64 secure?

No. Anyone can decode it; use appropriate encryption and key management for confidentiality.

Why does Base64 sometimes end with =?

Padding marks complete the final four-character group when the byte length is not divisible by three.