Google Ads Preview & RSA Builder

About the Google Ads Preview & RSA Builder

Write a responsive search ad and see it take shape: up to 15 headlines and 4 descriptions with live character counts, two display paths, pins, keyword insertion and the final URL. Every field is checked against Google Ads’ published limits — 30 characters a headline, 90 a description, 15 a path, double-width Chinese, Japanese and Korean characters counting as 2 — and its editorial rules on capitals, punctuation, emoji, spacing, repetition and phone numbers. The pins are checked too, so positions 1 and 2 can always be filled.

The preview shows the ad as a mobile and a desktop search ad, one combination at a time, with keyword insertion filled in by a keyword you choose (or its default text, as Google does when the keyword doesn’t fit). When the ad is ready, export it as a file for Google Ads Editor with the campaign and ad group it belongs to.

Without a pass you see a free preview: the mobile and desktop previews and every check of your ad, with the first lines of the Google Ads Editor file. The whole file, and copying or downloading it, unlock with a Pro pass.

Google Ads’ rules this builder applies

• From About responsive search ads: 3–15 headlines of up to 30 characters, 2–4 descriptions of up to 90 characters, two paths of up to 15; each character of a double-width language counts as 2; headlines and descriptions may appear in any order, so each must make sense on its own; headlines pinned to positions 1 and 2 and descriptions pinned to position 1 always show; pinning isn’t recommended for most advertisers and can affect ad strength.
• From Set up keyword insertion: the code is {keyword:default text}, capitalised as keyword, Keyword, KeyWord, KEYWord or KeyWORD; it works in headlines, descriptions and display paths, not in the final URL; the default text must keep the ad within the limits.
• From the editorial policy: capitals and punctuation used correctly (no “FLOWERS” or “flowers!!”), no emoji or half-width katakana (unsupported characters), no gimmicky spacing or repeated asset text, no generic call to action such as “click here”, and no phone numbers in ad text.
• The file uses the column names of Google Ads Editor’s CSV file columns — Campaign, Ad group, Headline 1–15 with Headline 1–15 position, Description 1–4 with their positions, Path 1, Path 2 and Final URL — saved as Unicode text, which Prepare a CSV file recommends.

What the preview can and can’t show

The mock-up follows the shape of a search ad — the Sponsored label, the domain and display path, headlines separated by a bar and the descriptions — in both widths. It is not Google’s renderer: Google decides which assets to combine for each search, may show two headlines instead of three or one description instead of two, and adds assets such as sitelinks. The headline and description orders under the preview count the combinations your pins allow, filling three headline and two description positions where it can.

Limitations

• MySmartCoPilot is not affiliated with or endorsed by Google.
• Ad strength is Google’s own rating; it can’t be calculated outside Google Ads, so this tool doesn’t show one.
• Policy checks cover the editorial rules that can be read from the text; Google also reviews the landing page, trademarks and restricted products.
• Ad customizers other than keyword insertion (location, countdown, customizer attributes) are shown with their default text.
• The file holds one ad. Import it into an existing campaign and ad group in Google Ads Editor, then review it before posting.

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