Is the Compress Images skill free?

Yes. The skill itself is free from rameerez/claude-code-startup-skills. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Compress Images SkillProof Score?

8.8/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 4/5.

How do I install Compress Images?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Compress Images with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Compress Images

Iterative cwebp loop that lands every image under a 100KB web/SEO target

by rameerez · rameerez/claude-code-startup-skills

Works with setup

Install — copy the command Download source ↗

Test report

Verdict: Works with setup
Score: 8.8/10
Tested: Jul 15, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Jul 18, 2026 · d52ff8b

Real A/B on a worst-case 3.1MB noise-heavy synthetic JPG: a naive single-pass `cwebp -q 80` (my baseline) left it at 1.7MB, 17x over the stated 100KB target, while following the skill's iterative quality+resize loop actually got it down to 58KB — but cwebp has to already be installed (brew install webp), a step SKILL.md never mentions.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 8/10
Docs & honesty 4/5

What Compress Images does

Single-file bash skill (allowed-tools restricted to cwebp/ls/mkdir/mv) that moves source JPG/PNG/GIF files into an originals/ subfolder, then repeatedly lowers cwebp quality and resize dimensions until every output is under 100KB, reporting before/after sizes and updating file references. Trigger it when optimizing images for page speed, reducing asset weight, or converting to WebP; it silently depends on the cwebp binary already being on the machine, which SKILL.md never tells you to install.

How to install Compress Images

git clone https://github.com/rameerez/claude-code-startup-skills
cd claude-code-startup-skills
mkdir -p ~/.claude/skills
cp -r skills/compress-images ~/.claude/skills/compress-images

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Compress Images

/compress-images Iterative cwebp loop that lands every image under a 100KB web/SEO target

It also activates on plain-language prompts like these:

compress these hero images down under 100kb for page speed
convert my product photos to webp and shrink them for the web
get all these image assets under our size budget without quality loss

Frequently asked questions

Is the Compress Images skill free?: Yes. The skill itself is free from rameerez/claude-code-startup-skills. SkillProof publishes the install command and an independent test verdict at no cost.
Does Compress Images work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 15, 2026. Verdict: Works with setup. Real A/B on a worst-case 3.1MB noise-heavy synthetic JPG: a naive single-pass `cwebp -q 80` (my baseline) left it at 1.7MB, 17x over the stated 100KB target, while following the skill's iterative quality+resize loop actually got it down to 58KB — but cwebp has to already be installed (brew install webp), a step SKILL.md never mentions.
What is the Compress Images SkillProof Score?: 8.8/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 8/10, docs & honesty 4/5.
How do I install Compress Images?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Compress Images with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.