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Base64 Encoder/Decoder

Encode UTF-8 text or binary files as Base64/Base64url and decode with strict or forgiving validation

Browser processingbase64base64urlbinaryutf-8encodedecode

Terms explained

Plain-language definitions for technical terms used by this tool.

Base64: A text encoding for binary data. It is not encryption and provides no secrecy.
Base64url: A URL-safe Base64 variant that replaces two characters and often omits trailing padding.
Canonical: The one standard spelling of encoded data, including valid padding and unused bits.
UTF-8: The byte encoding used to turn text into bytes before Base64 encoding.