Investigator Tools
Free, field-ready tools built for crash reconstruction and forensic investigation professionals. The browser-based tools do their work right in your browser — nothing is transmitted or stored.
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Browse everything below. Opening any tool asks you to sign in, then brings you right back here.
Case Billing Tracker FREE
The same workbook I use on my own cases — an Excel file with VBA behind it that does exactly what a crash reconstruction consultant needs: log your work, track your costs, and generate a period-filtered invoice without losing your records. Built for practitioners new to the business side and shared with the ForensicCrash.net community.
VIN Decoder + Recalls FREE
Decode any 17-character VIN straight from NHTSA and pull open safety recalls, plus optional Canadian vehicle specifications. Data comes back exactly as the source feed returns it — no editing, no storage — with a printable report you can save or hand off.
Unit Converter FREE
Pick a category, type a value, choose a from and to unit — the result and the 1 : N conversion rate update live, and Copy drops both into your report. Covers length, speed, acceleration, mass, pressure, force, torque, energy, and temperature. Pure in-browser math: nothing is transmitted and nothing is stored.
Photography Job Start Page FREE
Quick scene photography header sheet for crash and crime scene documentation. Fill in the case details, screenshot or print, and you're ready to shoot.
Class Mapper FREE
A visual course schedule builder for trainers and providers. Lay out a multi-day class on a drag-and-drop board — sessions, breaks, and meals snap into morning, afternoon, and evening blocks with start and end times calculated automatically. Define your classes, color-code content types, then switch to a clean Rendered View to print or share the agenda. Save your work to a JSON file and pick it right back up later, or strip the dates to keep a reusable template.
Time Zone Converter FREE
Convert between UTC and any local time zone, correctly for the date you enter — the DST offset for that day is applied automatically (CDT in July, CST in January). Enter a date and time, pick a zone, and the converted time comes back with its exact offset for the record. Pure in-browser math using your device’s time-zone database: nothing is transmitted and nothing is stored.
Tire Size Speed Change FREE
Speedometer / ECM speed correction for non-OEM tire fitment. Enter the recommended and as-found tires — by size, overall diameter, or measured rolling circumference — and read the true ground speed at any indicated speed, the size-difference percentage, and a full speed-range table, with an optional rolling-radius correction. In-browser math; nothing is transmitted or stored.
Gear Ratio / Speed Range FREE
Road speed in gear from engine RPM, transmission gear ratio, final drive, and rolling diameter. Single point, a full RPM-range sweep, all gears at once, or reverse-solve for the RPM, gear ratio, or tire diameter that produces a target speed — with an on-screen speedometer and a printable table. In-browser math; nothing is transmitted or stored.
More Tools Coming Soon
Speed-from-drag calculators, momentum worksheets, critical speed tools, coordinate transformation utilities, and more — built by reconstructionists, for reconstructionists.
