Load a range or dry-fire clip and the tool reads each shot off the audio track, calculates first-shot time and per-shot splits, then burns the timer overlay back onto the video. A free in-browser AI shot timer: local detection runs in your browser, no account, no subscription, no watermark. Optional Gemini AI review uploads the clip only when you run it, then applies reviewed marker changes with a revert button if the pass is wrong.
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Upload a clip, detect shot peaks from the audio, correct the markers, and play it back with synced timing overlays.
Original resolution, high bitrate
Click the rail to scrub. Drag markers to correct timing.
These are the exact rows used for CSV, JSON, and print output.
| Shot | Time | Split | Instant RPM | Event | Source |
|---|---|---|---|---|---|
| Upload a clip or add manual markers to print shot stats. | |||||
Yes. The Rifle Configurator shot timer video annotator is a free, browser-based alternative to Shotisize. It does the same core job: reads each shot from the audio of your range video, calculates first-shot time and splits, and exports a clip with the timer overlay burned in. No subscription, no account, no install. Shotisize (the AI feature inside the Shooters Global Drills app) runs $4.99 per month or $39.99 per year for the AI video pass. This tool runs detection locally and only uses cloud AI (Gemini) if you opt in for a second review on a messy match clip.
The end product is the same: a video with first-shot time, splits, and total string time overlaid on the footage. The detection path differs. Shotisize uploads your clip and runs a cloud AI pass to mark shots. This tool runs an in-browser audio detector by default, so the clip never leaves your device, and reserves cloud AI (Gemini) for an optional second pass on clips where the local detector misses or doubles markers. Trade-off: the local pass is private, free, and instant; the optional AI review is more forgiving on noisy match footage but uploads the clip. Shotisize is the right pick if you already live inside the Shooters Global Drills app for daily logging; this tool is the right pick for one-off match or training clip reviews without a subscription.
Split time is the elapsed seconds between one shot and the next. A shot timer measures it from the muzzle report, so a 0.25 split means a quarter second between bangs. This tool calculates each split from the audio track of your video and shows them in order so you can see which transition cost you time.
Load the clip into the annotator, let the audio-detection pass mark each muzzle report, then scrub the waveform to confirm or nudge each marker against the visible recoil. The tool reads the timestamp gap between markers as the split time and exports the running splits as an on-screen overlay on the video.
For a B8 or USPSA A-zone at 7 yards, 0.30 to 0.40 splits are solid for a recreational shooter, 0.20 to 0.25 is competitive club-level, and sub-0.20 with hits is GM territory. Rifle and PCC splits drop to 0.15 to 0.20 on close paper. Use the overlay to see whether your hits at a given split are still in the A-zone, raw speed is not the goal.
Accuracy depends on muzzle report clarity, echo, wind noise, and frame/audio sync in the source clip. Open-air rifle and unsuppressed pistol reports are crisp; indoor ranges, suppressed shots, and rimfire are harder. Treat auto-markers as a first pass, then drag or nudge each one against the waveform: corrected markers land within roughly +/- 0.02s of a hardware shot timer.
Yes. The shot timer video annotator is free and has no watermark on the exported clip. The normal local workflow is limited only by what your browser can hold in memory. The optional Gemini review has a shorter upload limit shown in the tool. There is no paid tier.
By default, no. The video is loaded from your browser's file picker and processed locally with browser media APIs. Upload happens only if you choose Save analysis for account history or run the optional Gemini AI video review, which can auto-update markers and keeps a revert button.
Anything your browser can decode: MP4/H.264 from a phone, MOV from iPhone, and most action-camera MP4s work. If the browser cannot decode the audio track (some HEVC variants, proprietary codecs), the video still loads and you can place markers manually at the playhead.
Yes, phone video is the most common input. Position the phone behind or to the side of the shooter (not next to the muzzle) so the mic does not clip, record in landscape at 30 or 60 fps, and the tool will handle both regular and slow-motion clips. Slow-mo is actually easier for the detector because shots are spaced further apart in the timeline.
Yes. Detection works on any sharp audio impulse the camera mic records, including pistol, rifle, PCC, and shotgun. Suppressed shots and .22 rimfire are harder because the report is quieter, expect to add or correct more markers manually for those clips.
Yes, if you care about pushing speed without giving up hits. A shot timer turns a vague feeling like 'that draw felt fast' into a hard number you can compare across reps, drills, and weeks. Hardware timers like the AMG, PACT, and Pocket Pro are the right tool for live drills with a random start beep. A video shot timer like this one is for after-the-fact review: pulling splits off footage you already filmed, sharing annotated clips with a coach, or extracting numbers from match video. Most serious shooters use both.
Shot timers measure four things: par time (a beep at start, a beep at the end of an allotted window), draw to first shot, splits between shots, and total string time. They turn drills like Bill Drills, El Presidente, and the FAST drill into measurable outputs instead of vibe-based practice. They are also how almost every action-shooting sport scores stages: USPSA, IDPA, Steel Challenge, and 3-Gun all use the timer for raw time, then add hit penalties.
Most hardware timers do not, because dry fire produces no muzzle report for the microphone to detect. Workarounds include the Mantis X (accelerometer-based), the DryFireMag (mechanical reset that triggers a sensor), or apps like CoolFire Trainer and Pistol Wizard that use a phone mic to listen for the trigger or hammer click. This video tool reads sharp audio peaks, so a clear dry-fire trigger click can be detected, but the signal is much weaker than live fire and you should expect to add or correct most markers manually for dry-fire clips.