How to use the Ad Headline Length Checker

Type or paste your headline. The tool checks character count against the maximum for every major ad platform — Google RSAs, Meta Ads, LinkedIn, TikTok, X, YouTube, Pinterest, Reddit. Green check = fits. Red X = will get truncated. Updates as you type.

Pourquoi cet outil est important

Every paid platform has different headline character limits. A copywriter focused on one platform regularly produces headlines that truncate ugly on others. Truncation costs CTR — sometimes 30-50%. Checking length once across every platform takes 2 seconds and prevents the most common cause of ad fatigue.

Cas d'utilisation courants

• Producing headline variants for multi-platform campaigns
• Adapting Google RSAs for Meta/LinkedIn cross-posting
• QA before agency hands off to media team
• Briefing copywriters with platform-aware specs
• Spotting which campaigns need platform-specific variations
• Quick check before pasting into the ad platform interface

Why platforms truncate differently

Google Search shows up to 90 chars on desktop but 30 on mobile in responsive ads. Meta auto-cuts at 27 chars in some placements (Stories, mobile feed). LinkedIn truncates at 70 in mobile. The headline that fits the strictest platform fits everywhere — design to the lowest common denominator for cross-platform creative.

Foire aux questions

What about character vs word counts?
Ad platforms count characters (including spaces and punctuation), never words. Even “OK” is 2 characters.

Do emoji count as one or multiple characters?
Most platforms count each emoji as 1-2 characters depending on the emoji. The tool uses JavaScript string length, which matches what most ad platforms compute.

Should I write the shortest possible headline?
No — write the most compelling headline that fits within limits. Shorter is not always better. Headlines under 15 chars often feel thin.

Why is my Google RSA headline still truncating at 30 chars even though I wrote 90?
Google Search RSAs combine up to 3 headlines into one. Each headline must be under 30 chars. The 90-char limit is for “long headlines” used in Google Display, not Search.