Developer Tools

Encoders, formatters, and generators for everyday development work.

Base64 Decode for Excel

Decode a Base64 cell to text or back to the original file, without a macro.
Hex to RGB for Excel

Hex, R/G/B, the RGB() formula, and the reversed BGR long Excel actually stores.
Unix Timestamp to Excel Date

Epoch seconds to an Excel serial and back, with the 1900 bug and 1904 Mac offset.