Filesize Converter
Restore ECU files to their correct flash size
What does this tool do?
Some ECU reading tools (like Autotuner) save files that are smaller than the ECU's actual flash memory. This causes issues when writing back — the file doesn't match the expected layout. This tool restores the correct size by prepending the missing 0xFF padding bytes before your original data.
Read file
~2 MB
Incorrect size
→
Converted file
8 MB
Correct size
0xFF padding (prepended)
Original ECU data
How it works
1
Select the ECU type to determine the expected total size and data offset
2
Drop your original file (the one read with Autotuner or similar)
3
Click Convert & Download — the output is filled with 0xFF up to the offset, then your data follows
Known compatible reading tools
Autotuner
Any tool producing undersized reads
Important: Always verify the converted file with a checksum tool before writing it back to the ECU.
ME17
MED17
MEG17
MEV17
EDC17
MD1
MG1
Continental