A spell checker is like a virtual assistant on your computer or phone that helps you find and fix spelling mistakes in your writing. It scans your text and highlights any misspelled words, making it easier for you to correct them. Full definition
Use a computer program spell checker for checking the latest version of the essays. (essaywritingservices.org)
Computer spelling checkers do not catch correctly spelled words used incorrectly — «of» for «on,» for example, or «their» for «there.» (resumesolutions.ca)