Free tool · no signup
App store screenshot checker
Check local screenshot files for dimensions, format and transparency against selected store requirements.
Images stay in your browser. We detect visible transparency; a PNG can still contain an alpha channel with entirely opaque pixels. Export without an alpha channel for final submission. This tool does not verify PNG bit depth or color profile.
How to use this tool
Choose the device group you are preparing for, then select up to ten PNG or JPEG images. Portrait and landscape dimensions are checked.
What the result means
Supports selected iPhone/iPad groups and basic Google Play phone requirements. It does not judge messaging, accessibility inside the image or guarantee store acceptance.
Your inputs stay with you
Text and images are processed in this browser. The tools do not send these inputs to a server or save them between visits. Download text results when offered to keep your work.
Common questions
Does this predict rankings or downloads?
No. It helps with the specific task described above. Decisions still require product context, platform review and relevant performance evidence.
Do I need an account?
No. Use the tool immediately. Export your work before leaving; input contents are not stored by this site.
Continue with the method
Read the related practical guide →
Learn the complete workflow in the ASO course or ask about a professional audit.
Rules and sources
Rules checked 29 September 2026. Store consoles remain the final submission check; requirements may change.