Load a telemetry file to get started.
Telly is a racing telemetry viewer that runs entirely in your browser. It reads iRacing .ibt, MoTeC .ld (with .ldx setup sidecars) and Garage 61 .csv files, aligns laps by distance so they can be overlaid and compared, and draws delta traces, a track map and a car setup diff. Parsing happens on your machine, so telemetry is never uploaded.
Enable JavaScript to use it. Questions go to the Telly Discord.
More by Jason: rMap - iRacing input mapping & force feedback and Marks - audio braking markers for SimHub. Made for speed by Jason.