Highlighting text on the web helps when you are researching, studying or reviewing long articles and want to find key points again quickly. A highlighter extension adds that ability to any page, and the better ones remember your highlights across visits and let you collect them in one place instead of losing them when you close the tab.
Saving highlights so they persist across visits
The main difference between highlighter extensions is whether marks disappear when you leave the page or stay saved for your next visit. Look for one that stores highlights tied to the page URL, so returning to an article later shows the same highlighted passages without redoing the work.
Multiple colors and organizing highlights
Using different colors lets you separate categories, such as key facts in yellow and questions in another color. Some highlighter extensions also add notes to a highlight or group them by page or topic, which helps when you are pulling research together from several articles.
Exporting or searching your highlighted text
If you highlight regularly for research or study, look for an extension that lets you export highlights as text or view them all in one list rather than reopening every page. Being able to search across saved highlights turns scattered notes into a usable reference.