Grammar Checker

A grammar checker is a program, or part of a program, that attempts to find grammatical errors in written text. These errors can include improper sentence structure, misspelled words, incorrect word usage (using there instead of their), and misplaced punctuation. Grammar checkers are often a feature of a larger program, such as a word processor, but can be offered as a standalone application. Some grammar checkers will also check phrasing, style consistency, and active and passive voice and perform readability testing.

A grammar checker uses natural language processing and grammatical rules to identify misspelling and other language errors. A grammar checker takes each sentence within a text, looks up each word in its extensive dictionary, and tries to parse the sentence into a form that matches correct grammar. The parsing process is used to detect words that fail to follow accepted usage.

Why use a grammar checker?

Writers use a grammar checker to ensure grammatical correctness and consistency within their writing. Most times, a checker will indicate an error has occurred in the writing with a visual aid. For example, Microsoft Word places a red squiggly line under misspelled words and a green squiggly line under incorrect phrases.

Using a grammar checker can save time when proofreading a document, provide useful feedback to help a user learn about grammar, and ensure that writing is error-free, which is critical when writing important documents.

Use caution with a grammar checker

As grammar is complex and ever-changing, these programs are far from perfect, so users should never rely fully on one and should continue to use their own judgement when writing. While computer programming languages have specific syntax and grammar, the same can’t be said for natural languages, which have many rule exceptions.

Natural languages do not have to comply with strict rules, and they are not constrained by specific syntax. Hence, achieving accurate and complete grammatical verification is difficult.

Popular grammar checker tools

Popular standalone grammar checkers include:

  • Grammarly
  • Hemingway
  • Ginger

Popular word processors with grammar-checking capabilities include:

  • Microsoft Word
  • Google Docs
  • OpenOffice


Related Links

Best Grammar Checker

Abby Braden
Abby Braden is an award-winning writer and editor for websites such as,, and, where she covers technology trends and enterprise and SMB project management platforms. When she’s not writing about technology, she enjoys giving too many treats to her dog and coaching part-time at her local gym.

Top Articles

The Complete List of 1559 Common Text Abbreviations & Acronyms

From A3 to ZZZ we list 1,559 SMS, online chat, and text abbreviations to help you translate and understand today's texting lingo. Includes Top...

List of Windows Operating System Versions & History [In Order]

The Windows operating system (Windows OS) refers to a family of operating systems developed by Microsoft Corporation. We look at the history of Windows...

How to Create a Website Shortcut on Your Desktop

Website Shortcut on Your Desktop reviewed by Web Webster   This Webopedia guide will show you how to create a website shortcut on your desktop using...

Generations of Computers (1st to 5th)

Reviewed by Web Webster Learn about each of the 5 generations of computers and major technology developments that have led to the computing devices that...

Facial Recognition Software

Facial recognition software is a category of applications designed to identify or confirm...


The Chief Executive Officer (CEO) is the highest-ranking individual in a company in...

Adobe Spark

Adobe Spark is a suite of apps by Adobe Systems used to create...