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Base64 Decoder

Decode Base64 text locally in your browser. Convert Base64 to UTF-8 text without uploading the input.
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Decode Base64 locally

This Base64 decoder converts Base64 strings back to readable UTF-8 text in your browser. It can also decode image Data URLs in the image tab. Base64 is an encoding format, not encryption, so decoded content may reveal the original data.

Base64 Encoder

Base64 decoder FAQ

Is Base64 decoded on a server?
No. Text and image decoding run in your browser. BaseToolbox does not upload or store the Base64 input.
Is Base64 the same as encryption?
No. Base64 is reversible encoding. Anyone with the encoded string can decode it, so it should not be used as a security layer.
Can it decode UTF-8 text?
Yes. The text decoder handles UTF-8 output, including non-English characters, when the input is valid Base64 text.
What happens when the Base64 input is invalid?
The decoder shows an invalid Base64 message and does not produce text output. Base64 decoding is reversible encoding, not decryption or data recovery.