Base64 Encoder

Base64 Encoder/Decoder converts text and files to and from Base64, entirely inside your browser. Type or paste text to encode it, or paste a Base64 string to decode it back — switch direction with one click. It is fully UTF-8 safe, so emoji, accents and non-Latin scripts round-trip perfectly (many older tools silently corrupt them). You can also drop a file to get its data: URI, or paste a Base64 image to preview and download it. Unlike base64decode.org — which a third-party audit found fires over 600 network requests to nearly 100 ad and tracking domains on a single page load — this tool sends nothing anywhere: the encoding and decoding happen with your browser’s built-in functions, so your data never leaves your device. There is no account, no ad wall, no daily limit, and it supports both the standard and URL-safe (Base64URL) alphabets.

How it works

1. Choose Encode or Decode at the top.
2. Type or paste your text — or drop a file to get its data URI.
3. The result appears instantly below; click Copy to copy it.
4. Need URL-safe output? Turn on the Base64URL switch. Everything happens in your browser — nothing is uploaded.

FAQ