Base64 Encoder / Decoder

Encode or decode Base64 locally in your browser. Text, files, UTF-8, Base64URL and Data URLs are supported; your content is not sent to the server.

Direction

Input kind

Input text

Variant Padding Generate Data URL

Base64 output

How it works

Encoding uses the browser's UTF-8 and binary primitives, then Base64 conversion. Decoding validates malformed input, accepts line-wrapped Base64, and preserves binary bytes for download. Base64 is encoding, not encryption.