Developer Tools

Base64 Decoder

Decode a Base64 string back into readable text. Paste the Base64 and the decoded, UTF-8 aware result appears instantly, with a clear warning if the input is not valid Base64. Decoding runs entirely in your browser.

How do you decode a Base64 string?

To decode Base64, paste the encoded string and the original text or file data is returned. Base64 strings use A–Z, a–z, 0–9, plus and slash, and often end in one or two "=" padding characters. Decoding is not decryption - Base64 provides no security.

Runs in your browser. Your files and text never leave your device - nothing is uploaded.