CSV Log Viewer: synchronized engine and driver-input plots with exact cursor values and channel ranges.
CSV Log Viewer: ten synchronized plots in one workspace, with a shared cursor and exact channel values beside the traces.
Compare two time-aligned sample logs across engine speed, manifold pressure, and AFR, with solid and dashed overlay traces and shared cursor values.
CSV Log Viewer: measured AFR compared with its target across a selected full-throttle pull.
CSV Log Viewer: highlighted knock events with surrounding engine-speed and ignition traces.
CSV Log Viewer MAF Tool: binned fueling corrections, current and corrected curves, and per-site sample counts. Synthetic example.
CSV Log Viewer: measured AFR binned by engine speed and manifold pressure in a configurable heat-map table.
CSV Log Viewer Virtual Dyno: estimated wheel power and torque with vehicle setup alongside the result. Synthetic demonstration data.
CSV Log Viewer scatter plot: engine speed and airflow relationships with points colored by AFR.
CSV Log Viewer: synchronized engine and driver-input plots with exact cursor values and channel ranges.
CSV Log Viewer: ten synchronized plots in one workspace, with a shared cursor and exact channel values beside the traces.
Compare two time-aligned sample logs across engine speed, manifold pressure, and AFR, with solid and dashed overlay traces and shared cursor values.
CSV Log Viewer: measured AFR compared with its target across a selected full-throttle pull.
CSV Log Viewer: highlighted knock events with surrounding engine-speed and ignition traces.
CSV Log Viewer MAF Tool: binned fueling corrections, current and corrected curves, and per-site sample counts. Synthetic example.
CSV Log Viewer: measured AFR binned by engine speed and manifold pressure in a configurable heat-map table.
CSV Log Viewer Virtual Dyno: estimated wheel power and torque with vehicle setup alongside the result. Synthetic demonstration data.
CSV Log Viewer scatter plot: engine speed and airflow relationships with points colored by AFR.

CSV Log Viewer

$99.00 $149.00

CSV Log Viewer by Johnson Tuning is a Windows desktop app for reviewing, comparing, and analyzing vehicle datalogs.

See more in every log

Stacked time plots and compare-log overlays with automatic time alignment.

Scatter plots, 2D and 3D histogram tables, and advanced math channels.

VE and MAF correction tools, plus a virtual dyno with horsepower and torque overlays.

An event finder and saved custom workspaces for repeatable analysis.

Try it free for 14 days

Explore the full app before purchasing. Download the free trial for Windows.

Supported logs

Open CSV logs from COBB, EcuTek, MoTeC, MHD, RomRaider, EvoScan, and many more. Native log import is also available for supported HP Tuners, Holley, Hondata, Link ECU, Emtron, and Haltech formats. Try your own logs during the free trial to confirm compatibility.

License delivery

In the app, go to Help → License → Copy to copy your machine code. Include it in the license form when adding this product to your cart. Your license will be emailed within 1 business day of your order.

CSV Log Viewer by Johnson Tuning is a Windows desktop app for reviewing, comparing, and analyzing vehicle datalogs.

See more in every log

Stacked time plots and compare-log overlays with automatic time alignment.

Scatter plots, 2D and 3D histogram tables, and advanced math channels.

VE and MAF correction tools, plus a virtual dyno with horsepower and torque overlays.

An event finder and saved custom workspaces for repeatable analysis.

Try it free for 14 days

Explore the full app before purchasing. Download the free trial for Windows.

Supported logs

Open CSV logs from COBB, EcuTek, MoTeC, MHD, RomRaider, EvoScan, and many more. Native log import is also available for supported HP Tuners, Holley, Hondata, Link ECU, Emtron, and Haltech formats. Try your own logs during the free trial to confirm compatibility.

License delivery

In the app, go to Help → License → Copy to copy your machine code. Include it in the license form when adding this product to your cart. Your license will be emailed within 1 business day of your order.