Base64 Encoder & Decoder

Safely encode binary or string data to Base64, and decode back to plaintext locally.

Input Plain Text

Output Base64

Encoding binary data (like small images) into strings for embedding in HTML/CSS.
Decoding Base64 strings found in authentication tokens (like JWT headers).
Safely transmitting data over text-based protocols that might corrupt raw binary.

Remember that Base64 is an encoding method, not encryption. It does not secure your data.
When decoding JWTs, only decode the header and payload (the parts before the dots).

Currently, this tool supports text string encoding. For large files, a dedicated file encoder is recommended.

No, Base64 simply translates data into a different format. Anyone with a decoder can read it.

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