Free Caterpillar FLS & FL2 to BIN Converter Beta test

Extract supported binary blocks from Caterpillar FLS and FL2 firmware files, with a conversion report. FLS2 filenames are also accepted for FL2 packages.

Upload your firmware

Select your factory firmware container. The converter checks its contents and extracts the supported blocks.

What you’ll receive

ZIP with BIN blocks and address metadata

Input: One CAT FLS, FL2 or FLS2 file
File limit: 64 MiB per file

Your original stays separate from the result.

Output limits

Use files that match your ECU and software version. A converted container is not a tuned calibration.

How to convert your file

Choose the original factory container shown above. The filename extension must match the supported input.
After processing, review the conversion report and warnings.
Open My uploads to download the original, converted files and report again.

Supported Caterpillar layouts

Upload one FLS, FL2 or FLS2 container. FLS2 filenames are accepted for supported FL2 packages. Plain sequential and banked records are extracted; encrypted variants and unknown encodings return an explanation instead of a usable binary.

The report preserves each declared address, or bank identifier and offset. Separate banks remain separate. Missing address ranges are not filled, so an extracted block must not be mistaken for a complete ECU image.

Working with addresses

For example, a block declared at address 0x800000 does not imply that the BIN contains eight megabytes of preceding data. Use the address recorded in the report when mapping the block into your editor.

After extraction, you can check a supported ECU checksum or extract map definitions for WinOLS using compatible files.

Remapping

VAG Tuning

BMW & MINI Tuning

Ford Tuning

Gearbox Tuning

Classic & Vintage Tuning

Motorsport Tuning

Dyno Sessions

Free Caterpillar FLS & FL2 to BIN Converter Beta test

Upload your firmware

£150 off Stage 1, Stage 1+ and Stage 2

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Remapping

VAG Tuning

BMW & MINI Tuning

Ford Tuning

Gearbox Tuning

Classic & Vintage Tuning

Motorsport Tuning

Dyno Sessions

Upload your firmware