# Asc Screenshot Resize

Resize and validate App Store screenshots with current asc screenshot-size data and...

- Repository: https://github.com/rorkai/app-store-connect-cli-skills (1119 stars)
- Category: Mobile
- License: MIT
- Last updated: 2026-10-26
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add rorkai/app-store-connect-cli-skills --skill asc-screenshot-resize -g -a claude-code -y`
Codex: `npx skills add rorkai/app-store-connect-cli-skills --skill asc-screenshot-resize -g -a codex -y`
Cursor: `npx skills add rorkai/app-store-connect-cli-skills --skill asc-screenshot-resize -g -a cursor -y`
Gemini CLI: `npx skills add rorkai/app-store-connect-cli-skills --skill asc-screenshot-resize -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add rorkai/app-store-connect-cli-skills`

## Description

Resize and validate App Store screenshots with current asc screenshot-size data and macOS sips. Use when preparing or fixing screenshots for App Store Connect submission.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# 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:

```bash
asc screenshots sizes --output table
asc screenshots sizes --all --output table
```

For local validation before upload:

```bash
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:

- `IPHONE_65` for the common 6.5-inch iPhone screenshot set.
- `IPAD_PRO_3GEN_129` for the common 12.9/13-inch iPad screenshot set.

Run `asc screenshots sizes --all` when targeting other display types such as 6.9-inch iPhone, Apple TV, Mac, Vision Pro, iMessage, or Watch.

## Workflow

### 1. Sanitize filenames

macOS screenshots can contain hidden Unicode spaces that make tools fail with "not a valid file". Sanitize before batch work:

```bash
python3 -c "
import os
for f in os.listdir('.'):
    clean = f.replace('\u202f', ' ')
    if f != clean:
        os.rename(f, clean)
        print(f'Renamed: {clean}')
"
```

### 2. Inspect dimensions and metadata

```bash
sips -g pixelWidth -g pixelHeight screenshot.png
sips -g hasAlpha -g space screenshot.png
```

App Store Connect rejects screenshots with alpha transparency. Strip alpha by round-tripping through JPEG:

```bash
sips -s format jpeg input.png --out /tmp/asc-screenshot-no-alpha.jpg
sips -s format png /tmp/asc-screenshot-no-alpha.jpg --out output.png
rm /tmp/asc-screenshot-no-alpha.jpg
```

Batch-strip alpha from PNGs:

The rest: https://github.com/rorkai/app-store-connect-cli-skills/blob/HEAD/skills/asc-screenshot-resize/SKILL.md