WinOLS

WinOLS is a professional editor for engine control unit (ECU) files, made by EVC electronic in Germany. It does not connect to the car itself: you read the file with a separate tool, edit it, and write it back.

What it can do

• Finds and displays calibration maps in 2D, 3D and text views.
• Compares file versions, and manages projects and checksums through paid modules.
• Add-on plugins connect it to specific hardware.

Licensing

• Bought per seat, with no time limit. Premium features are an optional yearly cost.
• EVC's terms restrict a licence to one company and forbid reselling it.

Limitations

• A steep learning curve: it assumes you understand engine calibration.
• It needs a separate reading tool and a good backup process.

Good to know

Removing emissions equipment or changing emissions-relevant maps is illegal on road vehicles in many countries. Community rules do not allow instructions for emissions fraud.