Searching for an Ideal Preposition Finder: Best 10 Tools to Choose From Prepositions tell readers where an act occurred when it did and how it occurred. Writers make mistakes in describing these three areas, such as choosing the wrong proposition and wrong placement in a sentence. Fortunately, an instant preposition checker can find and fix these errors fast. Here is a list of ten such checkers. 1. PrepositionFinder.com Prepositionfinder.com is an easy-to-use, comprehensive preposition checker. It finds and fixes errors with improper use and placement errors on a sentence. The tool also has a grammar and spelling checker to enable quick proofreading. 2. Grammarly Grammarly is an AI-based preposition checker that finds and fixes such errors fast. You can check prepositions for free. However, you need the premium subscription to access other features such as plagiarism and tone checker. 3. Ginger Software Ginger is both an app and a web-based reposition checker. It is accurate, easy to use and fast. You can also integrate it into your word processor and browser for speedy proofreading of your work. The premium version has more features such as plagiarism and style checkers. 4. Grammar Check Grammar Check is a freemium accurate preposition checker tool. It comes with plagiarism, grammar, and style checker. You can use the free version to check for preposition errors, but other features require a subscription. 5. ProWritingAid ProWritingAid is a premium preposition checker, although it has a short trial period. It has an intuitive interface and an app for word processor software. The preposition checker also fixes spelling, grammar, style and capitalization errors and offers detailed feedback. 6. WhiteSmoke WhiteSmoke is an app and web-based prepositional phrase detector with several proofreading features. It can check style, grammar, tone, capitalization and plagiarism. Besides, it has add-ons for browsers and word processors.