Let’s face it: No one’s perfect. And that’s doubly true when it comes to spelling, grammar, and punctuation. But those writing mistakes could be costing you. Professionals with one to four promotions made 45 percent more grammar errors than those with six to nine promotions in the same time period, a recent study found.

That’s why Alex Shevchenko, Max Lytvyn, Dmytro Lider — three software developers based in Kiev, Ukraine — set out to build a cloud-based, algorithmic English-language checker that could proofread just about any document. They launched their solution — Grammarly — in 2009, and today they announced support for one of the most popular word processors on the web: Google Docs.

Grammarly on Google Docs launched in beta last month, but the integration goes live for more users this week. It requires the Grammarly for Chrome extension; when it’s active, you’ll see the Grammarly logo in the bottom right corner.

“It was one of our users’ most requested features. We basically had to build it.” Lytvyn told VentureBeat in an interview. “The challenge was [making] Grammarly work with Google’s rendering engine in their products. We spent a significant amount of time building something that’s robust enough so that when Google updates something, it won’t break.”

Grammarly checks for errors in real time as you type, underlining problematic phrases and words in bright red. Clicking on an error brings up a suggestion card with options to accept or flag it, ignore it, add it to your personal dictionary, or see an explanation.

The Google Docs tools come in two flavors:…