Convert text, files and images to and from Base64 instantly — with automatic JSON, JWT and image detection built right in. Everything runs in your browser.
Not sure what a decoded value actually is? Let AI look at your result and explain what it represents, in the style you pick below.
Base64 Encoder/Decoder converts text, files and images to and from Base64 instantly, right in your browser. Encode any text or drag in a file to get a ready-to-use data URI, or paste in a Base64 string to decode it back — with smart detection that automatically pretty-prints JSON, decodes JWT tokens into their header and payload, and previews images. A URL-safe mode is built in for tokens and query strings. If AI is configured on this site, you can also ask AI to explain exactly what a decoded value represents.
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