Car Rental Availability by Car Class with Free-Car Finder

Car Rental Availability by Class is an offline app (one HTML file in a zip) for a small rental company whose customers ask for a class of car, not a plate. You set your classes with daily, weekly and monthly rates and a km allowance. You enter the dates a customer wants and the app lists the cars of that class that are free for those dates. Bookings cannot overlap on one car, and the total is priced from the rates.

The problem it removes: A customer phones for an SUV from Thursday for four days and the answer comes from memory or a scroll through a chat. The same car is promised twice, a late return blocks the next booking without anyone noticing, and a long rental is charged at the daily rate by mistake. Excess km are forgotten at the return. Enquiries that could not be served are never counted.

What is inside:

• Classes with daily, weekly and monthly rates, km allowance per day, excess km rate and standard deposit
• Cars with plate, class and status, and for each car whether it is free today, free until when, and when it is next out
• Free-car finder: save the dates and class a customer asks for and see the free cars, and who has the busy ones
• Availability by class: cars, free today, out now, pickups and returns in the next 7 days
• Bookings that cannot overlap on one car, with weekly and monthly pricing, late days, excess km and extras
• Late returns that clash with the next booking, and a record of enquiries lost for lack of a car
• Example data you can load in one click, a Start here guide and an Honest limits panel
• JSON backup and restore, CSV export, and CSV import with a check of every row before anything is added

Who it is for: owners and counter staff of small car rental companies with a fleet of 5 to 60 cars in a few classes, who take bookings by phone and WhatsApp and need to answer "is an SUV free from Thursday" at once.

What it is NOT: It does not check licences, insurance, fines or tolls, and it keeps no ID copies. It takes no online bookings or card payments, does not find substitute cars by itself and does not message customers by itself. The agreement is sample wording that you must replace with your own terms. It is not legal, tax or accounting advice, it is not connected to any government system, bank or messaging service, and it does not file or send anything by itself. UAE e-invoicing is not part of it.

Your data stays on this device in your browser. Back it up with Export; clearing browser data loses it otherwise.

Verified by us: scripted tests in Chromium (196 checks through the real screens: adding, editing and deleting records in every table, required-field messages, backup then clear then restore, CSV export then import, keyboard order, print layouts rendered to PDF, no horizontal scrolling at 375 and 1280 pixels, no network requests) and an independent recalculation by a separately written Python evaluator of 2758 calculated values (25 randomised rows plus the example data) with 0 mismatches. Safari engine (WebKit): smoke test passed; Firefox: could not be launched. Not tested: Firefox beyond what is stated here, and no real printer was used (print layouts were checked as PDF).