Encode plain text into Base64, or decode Base64 back into readable text.
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Base64 encoding converts binary or text data into a string using only 64 safe, printable ASCII characters (A-Z, a-z, 0-9, plus two symbols). This makes it safe to embed data in places that only reliably support plain text, such as URLs, email attachments, or JSON fields. Decoding reverses the process, converting the Base64 string back into its original form.
A common misconception is that Base64 provides security, it does not. Anyone can decode a Base64 string instantly using any Base64 decoder, including this one, since there's no key or secret involved. Base64 is purely a format conversion for compatibility, not a way to protect sensitive data.
Encoding the text 'Hello, World!' produces the Base64 string 'SGVsbG8sIFdvcmxkIQ==', the trailing '==' is padding, added because the original text's length doesn't divide evenly into the 3-byte groups Base64 encodes at a time. Decoding 'SGVsbG8sIFdvcmxkIQ==' reverses this exactly, returning the original 'Hello, World!'.
Treating Base64 as a way to secure or hide sensitive data like passwords or API keys, it's trivially reversible by anyone, use actual encryption if confidentiality matters.
Removing the '==' or '=' padding at the end of an encoded string, some systems require the padding to decode correctly, stripping it can cause a 'malformed' error in strict decoders even though the tool itself may tolerate it.
Assuming Base64-encoded text is roughly the same size as the original, Base64 increases data size by about 33%, which matters when embedding large payloads in URLs or headers with length limits.
Base64 encoding converts binary or text data into an ASCII string format, commonly used for embedding data in URLs, emails, or JSON payloads.
Yes, this tool correctly encodes and decodes Unicode text, including accented characters and emoji.
No, Base64 is not encryption or security, it is simply a reversible encoding format and should not be used to protect sensitive data.
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