Yes you can run your entire article through anti-plagiarism tools. There are many free websites that offer this facility. Here are some free tools which I have found useful:
1. smallseotools -> plagiarism checker - This one's my favorite as it does a very thorough search. It compares every sentence and combination of multiple sentences to check for duplicate contents across the web. If found, that sentence is marked in red with a link to the content that is already existing. It also gives the word count. No sign-up is needed.
2. Duplichecker - This one allows you to copy-paste the article into a textbox or provide a link to your article. It highlights any duplicate text found. Signing up allows more number of checks per day than normal use.
3. Copyscape - This allows you to add a link to your article. I have not used it personally but have read great reviews about it.