Performance Max Asset Checker: check an asset group before you build it
Check headlines, images, logos and videos against Performance Max specs before you build the asset group.
- Free to use
- Runs in your browser
- No sign-up
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Paste your headlines and descriptions, pick your images and logos, or press Try an example.
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About the Performance Max Asset Checker
Paste the headlines, long headlines and descriptions for one Performance Max asset group, pick the images and logos you plan to use and add your YouTube links. The tool checks them against Google's current specs: counts, character limits, image shapes and sizes, file size, logos, videos and search themes, and flags repeats and text that may break Google's ad policies. You get our asset coverage measure, a do-these-first list and a clean copy of your text. Images are measured in your browser and nothing is uploaded.
How it works
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Step 1
Enter the final URL, business name, headlines, long headlines and descriptions, one per line, or press Try an example.
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Step 2
Pick your images and logos, paste your YouTube links and choose each video's shape, then add search themes and say whether you have an audience signal.
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Step 3
Fix what the do-these-first list shows, then copy the cleaned text or download the CSV and build the asset group in Google Ads.
What it checks
Google's Performance Max specs: 3 to 15 headlines of up to 30 characters with at least one of 15 or fewer, 1 to 5 long headlines and 2 to 5 descriptions of up to 90 characters, and a business name of up to 25. Images must be 1.91:1 (at least 600 × 314), 1:1 (at least 300 × 300) or the optional 4:5 (at least 480 × 600), as JPG or PNG files of up to 5,120 KB, and you need a square logo. Videos can be horizontal, square or vertical, up to 15, and an asset group takes up to 50 search themes.
Our asset coverage, not Ad strength
The coverage figure is our own measure of how fully the asset group is filled against the numbers Google recommends, such as 11 headlines, 4 images in each of the two main shapes and a video in each shape. It stays below 50% until every required asset is in place. Google shows its own Ad strength rating for each asset group in your account, and this tool does not reproduce it.
What this tool cannot do
It cannot see what an image shows, whether text on it is readable or how long a video is, and it does not contact YouTube or Google Ads. Shape matching allows a 1% difference, which is our measure, not Google's. Policy flags are a pre-check of the text, not Google's review. Specs change, so check the asset group in Google Ads before you publish.
Frequently asked questions
What are the image sizes for Performance Max?
Google lists three image shapes: horizontal 1.91:1 (1200 × 628 recommended, 600 × 314 minimum), square 1:1 (1200 × 1200 recommended, 300 × 300 minimum) and vertical 4:5 (960 × 1200 recommended, 480 × 600 minimum). Horizontal and square images are required and vertical ones are optional. Each file can be up to 5,120 KB, as a JPG or PNG, with the key content in the centre 80% of the image.
How many headlines and descriptions does Performance Max need?
An asset group needs at least 3 headlines of up to 30 characters, 1 long headline of up to 90 and 2 descriptions of up to 90, plus a business name of up to 25 characters. You can add up to 15 headlines, 5 long headlines and 5 descriptions. Google recommends 11 or more headlines and 4 or more descriptions, with at least one headline of 15 characters or fewer.
What happens if I do not add a video to Performance Max?
If an asset group has no video, Google may auto-generate one or more videos from the images and text in it. To avoid that, upload your own video to YouTube and add the link. Google accepts horizontal 16:9, square 1:1 and vertical 9:16 videos of at least 10 seconds, up to 15 per asset group, and recommends a vertical video of 10 to 60 seconds for YouTube Shorts.
What logo sizes does Performance Max use?
A square 1:1 logo is required: 1200 × 1200 recommended and 128 × 128 at least. A horizontal 4:1 logo is optional: 1200 × 300 recommended and 512 × 128 at least. You can add up to 5 logos, each up to 5,120 KB. Logos with a transparent background may be shown on white, so avoid a mostly white logo on a transparent background. With brand guidelines, logos are set once for the whole campaign.
How many search themes can I add to an asset group?
Up to 50 per asset group. Search themes are optional signals that tell Performance Max which searches matter to you, on top of your assets and landing pages. Google advises against close variants such as "car" and "automobile", which reach the same people, so the tool flags themes that differ only by word order or plurals.
Sources and checks
Rules last checked
The Performance Max Asset Checker follows these official pages:
- Performance Max campaigns specs and format requirements (support.google.com)
- Use search themes with your Performance Max campaign (support.google.com)
- Editorial (support.google.com)
Scores, limits and suggestions marked "our checklist", "our measure" or "our suggestion" are ours, not Google's or the platform's. How our tools work
Related reading
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