RSA Character Counter

What Our Responsive Search Ad Character Counter Does

Our free responsive search ad character counter checks every headline and description against Google Ads limits before you paste them into your campaign. As you type, it counts characters in real time and flags anything that runs long, so you can fix it on the spot instead of getting rejected at upload. Think of it as a Google Ads character counter built for the way real advertisers work: fast, accurate, and tuned to the exact limits Google enforces. It removes the guesswork from RSA headline length and keeps your assets clean, compliant, and ready to perform.

Google Ads RSA Character Limits

Responsive search ads assemble your assets into different combinations, so each piece has to stand on its own and stay inside Google's hard limits. Here is what you are working with:

• Headlines: 30 characters each. You can provide up to 15 headlines per RSA.
• Descriptions: 90 characters each. You can provide up to 4 descriptions per RSA.

That gives you a large pool of assets that Google can mix and match, serving the combinations most likely to perform for each query and device. More quality assets mean more chances to find a winner, which is why our counter makes it easy to draft the full set in one sitting. You can confirm these limits in the official Google Ads Help documentation on responsive search ads.

Why Staying Within the Limits Matters

Going over the limit is not just a style problem. Headlines or descriptions that exceed 30 or 90 characters will be rejected, and your ad will not run until they are fixed. Even when you are close to the ceiling, longer assets are more likely to be truncated on smaller screens, which means your call to action or offer can get cut off mid-sentence.

Truncated copy hurts clarity and click-through rate. A headline that reads "Get Your Free Quote Today and Sav..." does not do its job. Counting characters as you write lets you front-load the important words, keep your message complete, and protect the performance metrics that actually move budget. If you want to model how copy changes affect downstream results, pair this tool with our CTR calculator.

How to Write Strong Headlines and Descriptions Within the Limit

Tight character limits reward discipline. The best-performing assets say one clear thing and say it well. Use these principles as you draft:

• Lead with value. Put your benefit, offer, or differentiator in the first few words so it survives any truncation.
• Vary the angle. Across your 15 headlines, cover benefits, features, social proof, urgency, and your brand name. Repetitive headlines waste the asset pool.
• Include the keyword naturally. At least a few headlines should reflect the search terms you are bidding on, but never at the cost of readability.
• Use descriptions to expand, not repeat. Your four descriptions should add detail, address objections, and reinforce the call to action rather than echo the headlines.
• Write a clear call to action. "Get a Free Audit," "Book a Demo," or "Shop the Sale" tells the user exactly what happens next.

For a deeper playbook on structuring and testing your assets, see our guide to responsive search ads best practices.

Pinning and Asset Variety Basics

By default, Google can place any headline in any position. Pinning lets you lock a specific headline or description to a fixed position, which is useful when a legal disclaimer, brand name, or required phrase must always appear in a set spot. The trade-off is fewer combinations, so pin only when you have a real reason to.

To preserve flexibility, pin at least two or three assets to the same position rather than just one, so Google still has options to test while honoring your requirement. The goal is to balance control with the asset variety that makes RSAs effective. Strong variety, paired with disciplined character counts, gives the algorithm the room it needs to optimize toward your goals.

Frequently Asked Questions

How many characters can an RSA headline be? Each headline can be up to 30 characters, including spaces. You can add up to 15 headlines per ad.

How many characters can an RSA description be? Each description can be up to 90 characters, including spaces. You can add up to 4 descriptions per ad.

Do spaces and punctuation count toward the limit? Yes. Every visible character, including spaces, commas, and symbols, counts against the 30 and 90 character limits.

How many headlines and descriptions should I actually write? Fill as many as you can. More quality assets give Google more combinations to test, which generally improves ad strength and reach.

Want this handled for you? Our team builds and optimizes high-performing campaigns end to end. Explore our digital advertising services to see how we turn well-written assets into measurable results.