How to use the Google Ads Headline Length Checker
- 1. Write your ad textFill in headlines, descriptions and the two display path fields.
- 2. Check lengthsSee each field's count, and how many characters it is over.
- 3. Keep editingCounts update as you type; download a CSV when it is ready.
Limits and the sample ad
Responsive search ads accept up to 15 headlines of 30 characters, 4 descriptions of 90 characters and 2 display path fields of 15 characters. The sample has four headlines from 22 to 27 characters, two descriptions of 86 and 85 characters and two paths, so the verdict is All within limits. The tool still suggests adding more unique headlines, because Google mixes and tests them, and needs at least 3 headlines and 2 descriptions.
We checked these limits in November 2026. They are editable at the top of the tool in case Google changes them.
Counting the way Google does
- Each letter, number, space and punctuation mark counts as one.
- Wide characters used in Chinese, Japanese and Korean count as two, as in Google Ads.
- Emoji are counted as written, but Google's policies reject most of them in ads.
- Path fields cannot contain spaces; use hyphens.
Length is only the first check. Google also reviews ads for excessive capitals, repeated punctuation, unverified claims and trademark use, which this page does not check. Write headlines that each make sense alone, because any one can appear next to any other. Build keyword lists with the keyword permutation generator and measure results with the ROAS calculator.
Frequently asked questions
Do I need all 15 headlines?
No, the minimum is 3. More unique headlines give Google more combinations to test, which usually helps performance.
Does the display path need to be a real page?
No. It only changes the URL shown in the ad. The final URL decides where people land.
Is the Google Ads Headline Length Checker free?
Yes, the Google Ads Headline Length Checker is free. The first time you check your first ad, you are asked for your name and WhatsApp number once. After that, this and every other Uncodemy tool opens straight away without the form.