Free Online Base64 Encoder / Decoder - Text & Data

What is Base64?

Base64 encodes binary data into ASCII characters, making it safe to transmit images, certificates or files over text-only protocols like JSON, URLs and email.

Our tool supports both text→Base64 and Base64→text, running entirely in your browser with no upload.

Is Base64 encryption?

No. It is just encoding and anyone can decode it, so do not use it to protect passwords or secrets.

Can it encode files?

This version handles text. You can paste a Base64 string (e.g. of an image) to decode and inspect it.

Does conversion leak my content?

No. All conversion is local in your browser; nothing is uploaded.

Why is the output larger?

Base64 inflates data by about 33% — that is inherent to the encoding.