Marketing · Guide
Google Ads headline character limits
Google Ads enforces a hard 30-character limit on every headline in a responsive search ad. Go over and the platform rejects it. Hit the limit exactly and your headline still might get clipped on mobile. Here are the numbers and the practical guidance around them.
Last reviewed: April 2026
The numbers
Responsive search ads (RSAs) have these limits per asset:
- Headlines: up to 15, max 30 characters each.
- Descriptions: up to 4, max 90 characters each (see the description limits article).
- Path fields: 2 paths, max 15 characters each.
Why 'exactly 30' isn't always safe
Google rotates 3 headlines into the visible ad slot. Two will usually appear stacked. On narrow mobile widths, long headlines wrap or get truncated with an ellipsis. Aim for around 25 characters when possible — leave a small buffer.
Special characters and emoji count as one character each but are visually wider. Test on a real mobile preview before locking copy in.
Headlines that hug the limit also tend to look cramped next to shorter sibling headlines. Variety in length improves readability and gives Google's system more useful combinations to test.
How many headlines to write
You can supply up to 15. The system rotates the best-performing combinations, so giving it variety helps. A practical minimum is 8 — fewer than that and your Ad Strength score drops to 'Poor'.
Pin headlines sparingly. Pinning more than 1–2 limits the system's ability to optimize, and pinning every headline to a specific slot essentially recreates the old expanded text ad with none of the responsive benefits.
Write headlines across distinct angles: value prop, feature, social proof, urgency, brand. Repetitive headlines score the same as fewer assets in Ad Strength because the system sees them as redundant.
Length distribution that works in practice
A useful target distribution across 12-15 headlines: roughly a third short (under 18 characters) to ensure mobile readability, a third mid-length (18-25 characters) for everyday use, and a third long (25-30 characters) for desktop slots that can render the full string.
Short headlines are particularly valuable because Google sometimes needs to stack three headlines in a single visible slot — and only short ones fit cleanly when stacked.
Validate before you upload
Pasting a list of headlines into the Google Ads Headline Checker shows pass/warn/fail per line, so you catch the over-limit ones before the platform rejects your ad. Warn entries are within limit but close enough to risk truncation; fail entries will be rejected at upload.
Summary
Stay under 30, leave breathing room around 25, write at least 8 unique variants across multiple angles, and validate before upload. Pin only when a piece of copy genuinely must appear in a specific slot (typically the brand name).
Frequently asked questions
- What happens if I submit a headline over 30 characters?
- Google Ads rejects the asset at upload. The ad still serves with the remaining valid headlines, but you lose the rejected one's contribution to combinations and Ad Strength.
- Do emojis count toward the character limit?
- Each emoji counts as a single character toward the 30-character limit, but they render visually wider than letters. Test the visible rendering on mobile before relying on emoji to communicate.
- How many headlines do I need for a 'Good' Ad Strength?
- At minimum 8 unique headlines across distinct angles. To reach 'Excellent', you typically need 11+ unique headlines plus all 4 descriptions filled in.