Effortlessly decode Base64 strings to their original plain text or binary format using our free online Base64 Decoder. This essential tool helps developers, system administrators, and cybersecurity professionals quickly interpret Base64 encoded data. Simply paste your Base64 string, and get instant results.
Formula:
Base64 encoding represents binary data in an ASCII string format by translating it into a radix-64 representation. Each 3 bytes of data are converted into 4 characters. Decoding reverses this process, converting 4 Base64 characters back into 3 original bytes.
Process:
- Input Base64 string is read.
- Each group of 4 Base64 characters is mapped back to its 6-bit integer value.
- These 6-bit values are concatenated to form 24-bit blocks.
- Each 24-bit block is then split into 3 original 8-bit bytes (characters).
- Padding characters (
=) are handled to correctly reconstruct the original data length.