How base64 decode works
Decodes standard Base64 bytes as strict UTF-8 text.
Try an example
SGVsbG8= → Hello.
Good to know
Binary non-UTF-8 data is rejected; this tool returns text only. Input stays in this tab and is never sent to analytics. Limit 100,000 characters. No input is executed.
Your privacy
Processing happens on this device. We do not upload your input, put it in share links or save it to your favourites. Closing this tab discards the working input; downloaded results remain wherever you save them.