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Convert UTF-8 text to Base64 or decode valid Base64 back into readable text without uploading anything.
Encode and decode up to 1,000,000 input characters locally. This tool is for UTF-8 text, not arbitrary binary files. Invalid UTF-8 produces an error instead of silently replacing bytes with unreadable characters. Standard Base64 whitespace and omitted padding are accepted; the Base64url alphabet is not supported. Unicode text, including an initial byte-order-mark character, is preserved. Base64 is encoding, not encryption.
Encoding Hello produces SGVsbG8=. Decoding SGVsbG8= returns Hello. Binary data such as /w== is rejected because it is not UTF-8 text.
No. Base64 only changes the representation of data and is easy to reverse.
Yes. It encodes and decodes UTF-8 text, including many non-English characters.
Base64 can contain any bytes, including images or binary files. This text decoder rejects bytes that are not valid UTF-8 instead of showing replacement characters.
No. Conversion happens locally in your browser.