Edok Studio Edok Studio
Free tool

App store screenshot size checker

Drop in a screenshot and find out which App Store and Google Play slots it is actually valid for — exact size match, Play’s 2:1 rule, format, and the alpha channel that gets uploads rejected.

Runs in your browser — nothing is uploaded

Drop screenshots here

or choose files — up to 12 at a time, PNG or JPEG

Nothing is uploaded. The check runs in your browser.

What it checks

Every file is measured against all 33 store dimensions we track — 26 App Store slots and 7 Google Play ones — in both orientations, because a slot accepts its size transposed.

Then it applies the rules that are not about the pixel count: Google Play refuses any image whose long side is more than twice its short side, both stores take only PNG or JPEG, and neither accepts an alpha channel on a screenshot. That last one is the most common rejection of all, and it is invisible until the store refuses the upload.

The alpha check is the useful one. A PNG exported from a design tool very often carries a transparent layer you cannot see against a white artboard. The store does not tell you which file is at fault — it just refuses the batch.

What "no matching slot" means

Apple accepts an exact list of dimensions per display class, not a range. If your file is not on the list, App Store Connect refuses it however good it looks — usually because it is a raw capture from a device Apple does not list, or because it was resized to a round number.

Google Play is the opposite: it publishes bounds rather than sizes, so almost anything between 320 and 3840 px passes as long as it stays inside the 2:1 rule. That is why one design has to be exported twice — see App Store and Google Play side by side in the full size table.

Next

Every store screenshot size Why screenshots get rejected Make a compliant set

Frequently asked questions

Are my screenshots uploaded anywhere?

No. The checker reads the image in your browser using an object URL and a canvas — the file never leaves your device and nothing is stored. You can disconnect from the network and it still works.

What does the checker actually test?

Exact pixel dimensions against every App Store and Google Play slot in both orientations, Google Play’s 320–3840 px bounds and its 2:1 aspect rule, the file format, and whether a PNG carries an alpha channel — the single most common cause of a rejected upload.

Why does the App Store say "no matching slot" when my screenshot looks fine?

Apple does not accept arbitrary sizes. Each display class has an exact list of accepted dimensions, and anything outside it is refused at upload — a screen capture from a device that is not in that list is the usual cause.

Why is a tall phone screenshot refused by Google Play?

Play requires that no side be more than twice the length of the other. Modern phone panels are around 2.16:1, which is over that line, so a raw full-bleed capture fails even though both dimensions are inside the size bounds. Export at 1080 × 1920 instead.