Filezap is a file-oriented disk examination and modification program that allows you to display the internals of any file in both hexadecimal and ASCII form and allows you to:
Examine files in record-sized segments of arbitrary length.
Search for hexadecimal and ASCII patterns.
Decode byte patterns as bytes, short integers, integers, long integers, single-precision floating point, double-precision floating point, binary data types, and Microsoft Visual Basic's currency, date/time, and Boolean data types.
Make direct changes in the file you're examining and write the changes back to the disk copy of the file.
Execute global cut, copy, paste, fill and search-and-replace operations on a text or binary file.
Execute chop, paste, and fill operations on a range of records in a text or binary file.
Print records from a file in both hexadecimal and ASCII format