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Diagnose · Free · No signup

App store screenshot checker

Check the files before the console complains.

Check local screenshot files for dimensions, format and transparency against selected store requirements.

Phone and landscape screenshot frames are checked with rulers and alignment guides.
Gabriel Machuret in an ASO Guru T-shirt: squinting at unreadable details.
Diagnose with GabrielFile-level dimension and format feedback
01 · BringLocal PNG or JPEG screenshot files
02 · MakeFile-level dimension and format feedback
03 · KeepExport the result. Own the next step.

Your workbench

Check your screenshots before submission.

Need an example? ↓

Private file check · Images stay in this tab. Download your results before leaving.

Accepted: 1260 × 2736 or 1290 × 2796 or 1320 × 2868; landscape reversals also accepted.

Ready for a file check?

Pick your device group, then choose the screenshots you plan to submit. You’ll get a preview and a clear fix for each file that needs attention.

PNG or JPEG · Up to 10 files · 15 MB and 20 megapixels per image

Images stay in memory and are discarded when you leave. This checks dimensions and visible transparency, not PNG bit depth, color profile or alpha-channel presence.

Worked example · illustrative

Find the issue. Choose the next move.

A screenshot can meet the selected device dimensions while its text is still too small to read at phone size.

Gabriel’s take

Technical checks and creative judgment are different jobs. Use this tool for the files, then review the message.

Try it on your app

Choose the device group you are preparing for, then select up to ten PNG or JPEG images. Portrait and landscape dimensions are checked.

Back to the tool ↑

Know what the result means.

What this tool checks—and what it doesn’t

Supports selected iPhone/iPad groups and basic Google Play phone requirements. It does not judge messaging, accessibility inside the image or guarantee store acceptance.

Where does my work go?

Text and images are processed in your browser. Research tools share a locally saved research project; listing tools share a separate listing project. Other text tools save drafts on this device when browser storage is available; the screenshot checker keeps files in memory only. Clearing browser storage can erase saved projects. Export important work.

Can Gabriel review the result?

Yes. Contact Gabriel with your listing and question to discuss the scope. Tool use is free; professional consulting is agreed separately. No data is automatically shared when you click Contact.

Check the platform requirements

Store requirements can change. Confirm your final fields and assets in the relevant console.

Read the practical guide →

Keep the work moving

Your next useful step.

Interactive ASO audit checklist

A prioritised fix, investigate and test plan

Open tool →

Want a professional diagnosis?

Start with an audit. Find the priorities before buying more work.

See how I work →

Enough theory. Your app next.

Let’s fix what’s holding your listing back.

Send your app link, target market and the problem. We’ll start there.