Kart Race Analyzer
Race-data overlay, fastest-lap reference, and lap-by-lap comparison — all in your browser.
1
Race Data Sources
Give the analyzer the two things it needs: your onboard race video and your lap times.
- Upload your onboard race video (MP4).
- Add your lap times using one of the tabs: upload a CSV, type them in by hand, or snap a photo and let OCR read them.
- Check the green status line confirms how many laps loaded and your fastest lap.
Onboard Video (MP4)
No video loaded yet.
Lap Times
Auto-detects lap-number and lap-time columns. Time format:
mm:ss.SSS or decimal seconds.CSV summary
| Lap | Time |
|---|
| Lap #e.g. 1, 2, 3… | Lap timee.g. 0:55.234 or 55.234 | Positionoptional · e.g. 2 |
|---|
Photograph the lap times only — a single vertical column of times, one lap per row, in order. Don't include lap numbers or positions: the first row is read as lap 1, the second as lap 2, and so on.
Confirm the time format BEFORE running OCR
Upload a photo of just the lap-time column, then run OCR.
Uploaded image
OCR result — review and edit the times, then apply
| Lap #auto · by row order | Lap timee.g. 0:55.234 or 55.234 |
|---|
No lap data loaded yet.
2
Race Start Calibration
Tell the tool the exact moment the race starts, then fine-tune it so lap timings stay accurate all the way to the finish.
- Scrub the left video to the exact frame the race begins, then click Mark race start — both videos freeze.
- Turn the dial (or use −0.05 / +0.05) until the right video shows the kart exactly at the start/finish line on the final lap.
- Click Confirm final race start to lock it in for the rest of the tool.
Race-start fine-tune
+0.00 s
race start —
Turn left to anticipate, right to postpone. One tick = 0.05 s.
Mark the race start to preview the final lap change here.
Race start not set yet.
3
Race Telemetry & Fastest Lap
Watch your race with live lap data on screen, next to a looping replay of your fastest lap, to see where you lose time.
- Press play on the left video — current lap, lap time, and an in-lap timer appear on screen.
- Your fastest lap loops on the right and kicks in the moment the race starts; pausing or playing either video controls both.
- Optional: slow both videos down to 0.5×, or click Render & download to save the edited video with the overlays baked in.
Edited footage waiting for inputs
Fastest-lap reference will appear here once data is loaded and race start is marked.
4
Lap Comparison Bench
Put any two laps side by side and play them in sync to spot exactly where one is quicker than the other.
- Pick a lap for the left screen and a lap for the right screen.
- Click Play both — they start together and stop together.
- Use Back to lap start at any time to rewind both videos to the beginning of their selected laps, perfectly aligned.
All laps
| Lap | Time |
|---|
Load lap data in Section 1 to see your laps here.
Sub-section 1 (left)
Sub-section 2 (right)