Check ad copy against search and social character limits
This ad copy character limit checker is a writing grid for responsive search ads: up to 15 headlines of 30 characters, 4 descriptions of 90 characters and two display-URL paths of 15 characters each, every field with its own live count and progress bar. Fields turn amber near the limit and red when they go over, a summary line tells you whether the ad has the minimum three headlines and two descriptions, and a preview shows one way the ad could be assembled.
Below the grid, a second panel checks social ad text — primary or introductory text, headline and description — against the figures the platforms publish for a Facebook Feed image ad and a LinkedIn single image ad. Everything is counted in your browser, and the counting uses the same grapheme rules as the character counter: an accented letter or an emoji with a skin tone is one character, as you see it.
How to use the Ad Copy Character Limit Checker
- Type your domain and the two optional path words that appear after it in the display URL.
- Write at least three headlines (up to 15 — open “Headlines 4–15” for the rest) and at least two descriptions.
- Watch each counter: amber means more than 90% of the limit, red means over it. The summary line names anything missing, over the limit or duplicated.
- Read the preview and press “Next combination” to see your headlines in a different order.
- Choose a social ad format and paste your primary text, headline and description to compare them with that platform’s recommendations.
- Press “Copy all” for a labelled list of every field, or “Download CSV” to paste the copy into a spreadsheet or bulk editor.
Ad Copy Character Limit Checker features
Full responsive search ad grid
15 headline, 4 description and 2 path fields with the published 30, 90 and 15 character limits.
Double-width rule
Chinese, Japanese and Korean characters count as 2, as the search ad help page specifies, so a 15-character Japanese headline already fills the 30.
Ready check
Counts filled fields against the minimum of 3 headlines and 2 descriptions and flags repeated headlines.
Ad preview
Three headlines and two descriptions with your display URL, rotated on demand.
Social text limits
Recommendations and maximums for Facebook Feed and LinkedIn single image ads, side by side with your counts.
Export
Copy a labelled list or download a CSV with each field’s count, limit and status.
Character limits used here
Read from each platform’s own help pages on 24 October 2026. Platforms revise these figures, so check the linked page before a large launch.
| Ad type and field | Limit | Source |
|---|---|---|
| Responsive search ad headline | 30 characters; 3 to 15 headlines | Google Ads Help: About responsive search ads |
| Responsive search ad description | 90 characters; 2 to 4 descriptions | Same page |
| Display URL path (×2) | 15 characters each | Same page |
| Double-width characters | Each counts as 2 | Same page |
| Facebook Feed image ad | Primary text 50–150 recommended; headline 27 recommended | Meta Ads Guide |
| LinkedIn single image ad | Intro 150 recommended / 3,000 max; headline 70 / 200; description 100 / 300 | LinkedIn Help: single image ad specifications |
How the characters are counted
Spaces, punctuation and symbols all count. In the search ad fields, each visible character counts as 1, except characters from double-width scripts — Chinese, Japanese kana and kanji, Korean Hangul and full-width forms — which count as 2, following the rule on the responsive search ad help page. That is why a headline can look short in Japanese and still be over the limit.
In the social panel the count is plain visible characters. LinkedIn states that its 150-character recommendation for introductory text includes spaces, emojis and punctuation. Meta’s figures are recommendations for how much text displays well; longer text is allowed but may be shortened behind a “See more” link.
How the preview is put together
A responsive search ad is assembled automatically from the headlines and descriptions you supply: up to three headlines can show in the headline position, with one or two descriptions below. The preview shows the first combination; “Next combination” rotates the order so you can check that every headline reads well next to the others. It is an illustration, not a pixel-exact copy of a results page, which varies by device and position.
- Write headlines that make sense in any order — each one should work on its own.
- Avoid saying the same thing twice; near-duplicates waste a slot.
- Put the strongest benefit or offer in at least one short headline, because shorter headlines leave room for a second and third.
- Use the paths for words that describe the landing page, such as a product category.
Ad Copy Character Limit Checker FAQ
What is the character limit for search ad headlines?
Each headline in a responsive search ad can be up to 30 characters, and you can enter between 3 and 15 of them. Descriptions can be up to 90 characters, with 2 to 4 per ad, and each of the two display-URL paths up to 15.
Do spaces count towards ad character limits?
Yes. Spaces, punctuation and symbols all count as characters. Double-width characters such as Chinese, Japanese and Korean count as two each in search ads.
Why does my Japanese or Chinese headline show double the characters?
Search ad limits treat every double-width character as two, so 15 kanji or Hangul syllables already use the full 30-character headline. The counter applies that rule automatically.
How long should Facebook ad text be?
For a Facebook Feed image ad, Meta’s ads guide recommends 50 to 150 characters of primary text and a headline of about 27 characters. Longer text is allowed but may be truncated.
What are the LinkedIn ad text limits?
For a single image ad, LinkedIn recommends up to 150 characters of introductory text (3,000 maximum), a headline of up to 70 characters (200 maximum) and a description of about 100 characters (300 maximum).
Does staying within the limits mean my ad will be approved?
No. This tool checks length only. Ads are also reviewed against each platform’s editorial and advertising policies, such as rules on punctuation, capitalisation and claims.
Is my ad copy saved?
Your last ad is kept in this browser’s local storage so it is there when you come back. It is never uploaded; use “Reset example” to clear the fields back to the sample.