Base64 Decoder
Decode Base64, Base64URL, and data URLs in your browser. Inspect the decoded bytes as text, an image preview, hex, or a downloadable file.
Base64 Decoder
Decode Base64, Base64URL, and data URLs in your browser. Inspect the decoded bytes as text, an image preview, hex, or a downloadable file.
About Base64 decoding
Paste Base64, Base64URL, or a data URL directly
The decoder removes whitespace, restores missing padding, and normalizes the hyphen and underscore used by Base64URL. For a data URL containing ;base64,, it separates the metadata and decodes the payload automatically.
One decoded result, several useful views
Base64 always decodes to bytes. The tool identifies UTF-8 text, JSON, images, and other binary data, then shows only the views that make sense for those same bytes: text, preview, Hex, or file download.
Decode and inspect locally
Decoding, file identification, previews, and downloads are created in your browser. The encoded input and decoded bytes are not uploaded to a server.
FAQ
Common questions and answers about this topic.
What is Base64 decoding?
Base64 decoding converts an ASCII Base64 representation back to its original bytes. Those bytes may contain text, JSON, an image, or another file format.
Can it decode data URLs?
Yes. Paste a data URL such as data:image/png;base64,... and the decoder will separate its media metadata from the Base64 payload automatically. Percent-encoded data URLs without ;base64, are not Base64 input.
Can I decode Base64 images and files?
Yes. Recognized images can be previewed, and any decoded bytes can be downloaded as a file. The Hex view also helps inspect unknown or custom binary formats.
Is my data sent to any server?
No. Base64 decoding, file identification, previews, and downloads are handled entirely in your browser. Nothing is uploaded to a server.