Pass Your CDL Written Exam with Confidence
Realistic practice tests, simple study guides, and endorsement prep for Class A, B, and C — everything you need to walk into the DMV prepared.
How PrepCDL Works
Three simple steps from first-time CDL student to exam-day confidence.
Pick your license path
Choose your CDL class and any endorsements you need — we'll show you exactly what to study.
Study and practice
Read state-specific study guides and take realistic practice tests with detailed explanations.
Walk in prepared
Track your progress, identify weak spots, and build the confidence to pass on test day.
Choose Your Path
Not sure where to start? Pick the license or endorsement that matches your driving goals.
Class A CDL
Tractor-trailers and large combination vehicles.
Learn moreClass B CDL
Straight trucks, dump trucks, and large buses.
Learn moreClass C CDL
Passenger and hazmat vehicles under Class A or B.
Learn moreHazmat
Prepare for hazardous materials rules, placards, loading requirements, safety procedures, and emergency response.
Learn moreTanker
Study liquid surge, tank inspections, loading and unloading rules, and safe handling of tank vehicles.
Learn moreDoubles & Triples
Learn coupling, uncoupling, trailer length limits, crack-the-whip risks, and safe handling of multiple trailers.
Learn morePassenger
Study passenger safety, loading procedures, emergency exits, bus inspections, and safe operating rules.
Learn moreSchool Bus
Prepare for school bus rules, student safety, railroad crossings, loading procedures, and emergency evacuation.
Learn moreTry 5 Practice Questions
A short 5-question quiz to preview how PrepCDL teaches CDL material.
What is the most important reason for doing a vehicle inspection?
Why Choose PrepCDL?
Everything you need to study smarter, practice faster, and walk into your CDL exam prepared.
1000+ Practice Questions
Practice with exam-style questions covering CDL rules, safety, inspections, endorsements, and real test topics.
State-Specific CDL Prep
Study material tailored to your state's CDL manual so you focus on the rules that matter for your test.
Realistic Exam Practice
Build confidence with practice tests, randomized questions, progress tracking, and detailed answer explanations.
Frequently Asked Questions
What's included with PrepCDL?
PrepCDL includes study guides, unlimited practice tests, and progress tracking for every CDL class and endorsement — general knowledge, air brakes, combination vehicles, hazmat, tanker, passenger, school bus, and more.
Does PrepCDL work for my state?
Yes. Our study material is built around state CDL manuals so you focus on the rules and topics that matter for your written exam.
Can I try PrepCDL before I buy?
Yes. Start a free practice test with no credit card required. You can explore sample questions and study guides before choosing lifetime access.
How is PrepCDL different from reading the CDL manual?
The CDL manual covers everything but can be dense and hard to navigate. PrepCDL organizes the material into focused study guides, adds realistic practice questions, and explains every answer so you learn faster.
Can I study on my phone?
Yes. PrepCDL works on desktop, tablet, and mobile, so you can study guides, answer practice questions, and review explanations anywhere.