---
title: "CSS Alpha Masking Skill - Air Market"
description: "Content that runs to the edge of its box gets sliced off hard, and you want it to fade instead. This applies a CSS alpha mask with a linear gradient to soften a horizontal or vertical edge. Reach for…"
canonical: "https://airmarket.ai/app/css-alpha-masking"
---

[Air Market](/) / [Design](/category/design) / CSS Alpha Masking Skill

Skill by [Meng To](/@mengto)

# CSS Alpha Masking Skill

Fade an element's edge out instead of cutting it off

## What this does

Content that runs to the edge of its box gets sliced off hard, and you want it to fade instead. This applies a CSS alpha mask with a linear gradient to soften a horizontal or vertical edge. Reach for it when an edge should trail off rather than stop.

### Top 3 things it does for you

- Fade the edge of a scroller or image
- Add a horizontal or vertical soft edge

## Information

**CSS Alpha Masking Skill at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Meng To](/@mengto) |
| Category | [Design](/category/design) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 67 KB |
| Licence | MIT |
| Repository | [MengTo/Skills](https://github.com/MengTo/Skills/tree/bdf0e83c5d12c84229b4f9c6524900aca65e44b8/agent-skills/web-design/css-alpha-masking) |
| GitHub stars | 5,235 (as of Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of CSS Alpha Masking Skill and flagged nothing. AIR's verdict: **safe**.

**What CSS Alpha Masking Skill's check was run against**

|  |  |
| --- | --- |
| Commit | bdf0e83c5d12c84229b4f9c6524900aca65e44b8 |
| Content hash | e7da6f479be2cf7f35865bf6a19eb5a6c4a4f2f2e3a1e09b8d29c72de5dab28c |
| Files read | [Browse the files at this exact commit](https://github.com/MengTo/Skills/blob/bdf0e83c5d12c84229b4f9c6524900aca65e44b8/agent-skills/web-design/css-alpha-masking/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for CSS Alpha Masking Skill](/security/css-alpha-masking)

## About CSS Alpha Masking Skill

This applies CSS alpha masking with linear-gradient for horizontal or vertical edge fades, using mask-image and -webkit-mask-image.

Use it when the ask is for alpha masks, fade edges, or CSS mask gradients.

## What's inside

- SKILL.md - instructions
- demo/index.html - template
- demo/preview.jpg
- demo/PROMPT.md - reference

## Questions

### Is CSS Alpha Masking Skill safe to install?

AIR scanned this exact version of CSS Alpha Masking Skill and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit bdf0e83c5d12, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/css-alpha-masking.

### How do I install CSS Alpha Masking Skill?

Open https://airmarket.ai/app/css-alpha-masking on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/MengTo/Skills/tree/bdf0e83c5d12c84229b4f9c6524900aca65e44b8/agent-skills/web-design/css-alpha-masking. Install from that link, not the branch.

## Related on Air Market

- [More Design listings](/category/design)
- [Everything by Meng To](/@mengto)

---

Canonical URL: <https://airmarket.ai/app/css-alpha-masking>