Uploaded Google display image ads must be one of 20 exact sizes and no larger than 150 KB, in GIF, JPG and PNG. HTML5 ads can be up to 600 KB, not the 150 KB many guides still quote. Performance Max and responsive ads take images instead, in 1.91:1, 1:1 and 4:5, up to 5,120 KB each.
Last checked 28 September 2026 against the platforms' own pages · Every figure links to its source
| Placement | Shape | File | Length |
|---|---|---|---|
| Display image | 20 fixed sizes | GIF/JPG/PNG up to 150 KB | animation 30 s max |
| HTML5 | 20 fixed sizes | zip up to 600 KB, 40 files | animation 30 s max |
| Responsive / PMax image | 1.91:1 1200×628, 1:1 1200×1200, 4:5 960×1200 | JPG/PNG up to 5,120 KB | still |
Google accepts 20 sizes for uploaded image and HTML5 ads. The file must be the exact size in pixels: a 640 × 100 retina export for a 320 × 50 slot is not accepted, and Google does not scale it down.
200×200, 240×400, 250×250, 250×360, 300×250, 336×280, 580×400
120×600, 160×600, 300×600, 300×1050
468×60, 728×90, 930×180, 970×90, 970×250, 980×120
300×50, 320×50, 320×100
Some sizes serve only in certain countries (Google lists them as regional). Source: Google Ads Help: uploaded display ad specs.
150 KB for every uploaded image ad, animated or not. Animated GIFs may loop but must stop within 30 seconds and run slower than 5 frames per second.
A file that lands a kilobyte over is the classic last-minute bounce. Gatecheck reports the exact byte count, and for JPG, PNG and WebP statics Pro can compress it under the limit in the browser and re-check it.
600 KB. Google's page says HTML5 ads must be "600 KB or smaller". The 150 KB figure that still ranks in search is the limit for image ads. The zip can hold up to 40 files (html, htm, css, js, gif, png, jpg, jpeg, svg).
How Google Ads compares with CM360, DV360 and IAB is on the HTML5 banner specs page.
Landscape 1.91:1 at 1200 × 628 px (minimum 600 × 314 px), square 1:1 at 1200 × 1200 px (minimum 300 × 300 px) and vertical 4:5 at 960 × 1200 px (minimum 480 × 600 px), in JPG and PNG, up to 5,120 KB.
Source: Google Ads Help: Performance Max specs and format requirements.
Every rule Gatecheck checks for these placements, with its source.
Uploaded image ads on the Google Display Network
| Sizes | 200×200, 240×400, 250×250, 250×360, 300×250, 336×280, 580×400, 120×600, 160×600, 300×600, 300×1050, 468×60, 728×90, 930×180, 970×90, 970×250, 980×120, 300×50, 320×50, 320×100 |
|---|---|
| Image formats | GIF, JPG, PNG |
| Image weight | up to 150 KB |
| Animation | stops within 30 s, slower than 5 fps |
HTML5 display ads uploaded to Google Ads
| Sizes | 200×200, 240×400, 250×250, 250×360, 300×250, 336×280, 580×400, 120×600, 160×600, 300×600, 300×1050, 468×60, 728×90, 930×180, 970×90, 970×250, 980×120, 300×50, 320×50, 320×100 |
|---|---|
| Zip weight | up to 600 KB |
| Files in zip | up to 40 |
| Allowed types | html, htm, css, js, gif, png, jpg, jpeg, svg |
| Click-through | clickTag or Google Web Designer exit |
| ad.size meta | required |
Image assets for Performance Max, Demand Gen and responsive display
| Ratios | 1.91:1 (1200×628 recommended), min 600×314; 1:1 (1200×1200 recommended), min 300×300; 4:5 (960×1200 recommended), min 480×600 |
|---|---|
| Image formats | JPG, PNG |
| Image weight | up to 5,120 KB |
Source: Google Ads Help: Performance Max specs and format requirements
Drop a file into the checker and it is read in your browser and tested against these placements and the other 21 in the library:
Checking one file at a time is free, with every check. Pro checks a whole campaign against a delivery plan and exports the report. Nothing is uploaded.
Gatecheck is not affiliated with Google. Specs come from their public help pages and, where marked secondary, from industry guides. Every source is linked on this page and was last checked on 28 September 2026.