Build consistent campaign links, check the GA4 channel, and export in bulk.
- Runs in your browser
Google won't accept a headline that's one character too long, and Meta cuts off text that runs past its recommended length. Write your ad here to check every field and see a preview as you type.
Runs in your browser. Nothing you add leaves this page.
Three steps
Choose the ad format, then type or paste your text.
Watch each field's count and fix anything marked in red.
Check the preview, then copy your text into the ad platform.
GuideReviewed
Each limit below comes from the platform's own help pages, checked in October 2026.
Google combines your headlines and descriptions in different orders, so each one has to make sense on its own. Google recommends giving it as many unique headlines as you can, so it has more combinations to try.
On Meta and LinkedIn, the start of your text is often all people see before "See more". Put the hook and the offer in the first sentence, and keep headlines short enough to read at a glance.
Google counts each Korean, Japanese, and Chinese character as 2. Its editorial rules also forbid extra spaces, punctuation used for effect, and unsupported characters, so this counter flags double spaces, repeated exclamation or question marks, and emoji.
What people ask before they use the Ad copy character counter.
Up to 30 characters, for both responsive search ads and Performance Max. Each Korean, Japanese, or Chinese character counts as 2.
Build consistent campaign links, check the GA4 channel, and export in bulk.
ROAS, break-even ROAS, profit after ad spend, and the target to aim for.
Check a test’s significance and lift, or plan its sample size and length.
From Ampere
Ampere is an AI marketing agent that turns your website or launch brief into campaign angles, ad images and videos, and script variants, made from your saved Brand memory and ready for your review.
No card required
Responsive search ads mix your headlines and descriptions into the ad that best fits each search. Korean, Japanese, and Chinese characters count as 2.
Shown as the address in the preview.
Headlines
4 of 15 · at least 3
Up to 30 characters each.
Descriptions
2 of 4 · at least 2
Up to 90 characters each.
Display path
Up to 15 characters each.
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Example
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Google shows 2 or 3 headlines and 1 or 2 descriptions at a time.
Previews are close approximations. Each platform's layout changes by device and over time.