Converters
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to plain text.
Output
About Base64
Encodes text to Base64 or decodes Base64 back to plain text. Base64 shows up constantly in places that aren't obvious from the encoded string alone — embedded images in HTML/CSS, Basic Auth credentials in HTTP headers, JWT payload segments, email attachment encoding. Worth remembering that Base64 is an encoding, not encryption — decoding it requires no key or secret, so anything sensitive shouldn't be considered protected just because it's been Base64-encoded.
Base64 output is roughly 33% larger than the original input — worth accounting for when estimating payload size for something like an embedded image or an API request body.