A responsive search ad lets you give Google up to 15 headlines and 4 descriptions, and Google combines them for each search. Writing them in the Google Ads interface makes it hard to see the whole set, spot duplicates or check that your main keywords appear often enough.
This builder shows a counter for every field against Google’s limits: 30 characters for headlines, 90 for descriptions and 15 for each display path, with at least 3 headlines and 2 descriptions. You can pin headlines to positions 1 to 3 and descriptions to positions 1 and 2. It checks for repeated text, exclamation marks in headlines, repeated punctuation and words in capitals, counts how many headlines contain each keyword you enter, estimates how many combinations your pins leave, and shows a sample ad you can shuffle.
Limits come from Google Ads Help, checked on 5 November 2026. Google decides which assets show for each search and may show fewer than three headlines. Ad Strength and editorial approval are decided inside your Google Ads account, so treat these checks as a pre-flight, not a guarantee.