Asc Screenshot Resize

rudrankriyam/app-store-connect-cli-skills

Preparing App Store Connect screenshots is tedious, and this skill automates the resize and validation workflow using macOS sips and the asc CLI. It pulls current screenshot dimensions directly from asc instead of relying on stale hardcoded tables, which matters because Apple changes requirements. The workflow covers filename sanitization (Unicode spaces break tools), alpha channel stripping (ASC rejects transparency), batch resizing to exact pixel dimensions, and validation before upload. It's opinionated about preserving originals and validating everything with asc before you touch the upload command. If you ship iOS or Mac apps and wrestle with screenshot prep every release, this condenses the tedious parts into a repeatable pattern.

skills.sh installs: 868
GitHub stars: 904
last updated: Jul 14, 2026

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Install

$ npx -y skills add rudrankriyam/app-store-connect-cli-skills --skill asc-screenshot-resize --agent claude-code

Installs into .claude/skills of the current project.

Files

asc screenshot resize

Use this skill to prepare screenshots for App Store Connect. Do not rely on a hard-coded dimension table in this skill; the CLI owns the current size matrix.

Source of truth

Always discover current accepted sizes from asc first:

asc screenshots sizes --output table
asc screenshots sizes --all --output table

For local validation before upload:

asc screenshots validate --path "./screenshots/iphone" --device-type "IPHONE_65" --output table
asc screenshots validate --path "./screenshots/ipad" --device-type "IPAD_PRO_3GEN_129" --output table

Common current device-type anchors: