RepairWorth is a web based tool that helps vehicle owners review a car repair estimate before approving or paying for the work. It does not guess what a repair should cost or provide average prices or labor rates. Instead, the tool accepts what a written estimate already says and checks whether the listed lines add up to the total. Users can enter a single total amount or enter each line item individually. The tool then shows which parts, labor, fees, and taxes have been itemized and which remain unspecified. It also identifies missing items and flags abbreviations that may need clarification. The tool offers several specific functions. It can compare two estimates side by side, matching them by line item and overall scope. It keeps any unfilled line as unknown rather than assuming a zero value. It decodes common industry abbreviations that shops use on written quotes. The tool does not diagnose the vehicle or assess whether a shop’s hourly rate or part price is fair, because it does not have access to licensed United States repair price data. Its purpose is limited to verifying the internal consistency and clarity of the estimate the user already holds. A typical workflow begins when a user receives a written estimate from a repair shop. The user enters the total cost of the estimate, then inputs each line for parts, labor, fees, and tax. The tool calculates whether the sum of the entered lines matches the total. If lines are missing or the total does not match, the tool highlights the discrepancy. Users can also enter a second estimate to compare the two. The comparison shows differences in scope and pricing and suggests questions to ask the shop, such as whether a part is new, aftermarket, used, or rebuilt, and how labor hours were determined. The tool is intended for users who have already obtained a written estimate and want to understand what is included before authorizing work. It does not require an account or subscription and runs entirely in a browser. The interface uses simplified drawings for illustration and is not to scale, nor does it serve as a diagnostic tool. RepairWorth is designed to help users identify red flags, such as missing line items or vague fee descriptions, and to encourage informed questions before approval.