Base64 → Text
Giải mã Base64 về Text ngay trong trình duyệt — preview lại file để chắc chắn không hỏng.
AK
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Input (Binary)
101010 111100 110101 ...
Split into 6-bit
101010 111100 110101 ...
Convert to Index
42 60 53 ...
Base64 Characters
q 8 1 ...
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All processing happens in your browser. No data is sent to any server.
For file payloads, use Image to Base64 or recover an inline asset with Base64 to Image.
Decode a Base64 payload back into the original UTF-8 text. The decoder strips whitespace and recognizes a leading data:...;base64, prefix automatically, so pasting full data URLs works without manual cleanup.
Bytes that do not form valid UTF-8 are rendered as the Unicode replacement character so the output is never empty. If you see replacement characters, the source is likely encoded as Latin-1 or another legacy charset.
The bytes likely use a non-UTF-8 encoding such as Latin-1 or CP1252. Inspect the hex view to confirm and decode externally if needed.
Yes. The decoder strips the data:...;base64, prefix and any whitespace before decoding.
An error is shown immediately and no output is produced. Common causes are missing padding or characters outside the Base64 alphabet.
Yes. Decoding is a pure reverse of encoding when the input is valid Base64.