Demerzels-lab Bundle Checker
Your bundle is 2MB and you don't know why. This tool analyzes your build output and tells you exactly what's eating up space and how to fix it.
One command. Zero config. Just works.
Quick Start
npx ai-bundle-check
What It Does
- Analyzes your bundle composition
- Identifies the largest dependencies
- Suggests tree-shaking opportunities
- Recommends lighter alternatives
Usage Examples
# Analyze current project
npx ai-bundle-check
# Analyze specific directory
npx ai-bundle-check ./my-project/
# Get detailed breakdown
npx ai-bundle-check --verbose
Best Practices
- Check before shipping - catch size regressions early
- Consider alternatives - moment.js vs date-fns makes a huge difference
- Dynamic imports - split code that isn't needed immediately
- Monitor trends - track bundle size in CI
When to Use This
- Your app loads slowly and you suspect the bundle
- Adding a new dependency and want to check the impact
- Performance audit flagged JavaScript size
- CI bundle size check is failing
Part of the LXGIC Dev Toolkit
This is one of 110+ free developer tools built by LXGIC Studios. No paywalls, no sign-ups, no API keys on free tiers. Just tools that work.
Find more:
- GitHub: https://github.com/LXGIC-Studios
- Twitter: https://x.com/lxgicstudios
- Substack: https://lxgicstudios.substack.com
- Website: https://lxgicstudios.com
Requirements
No install needed. Just run with npx. Node.js 18+ recommended. Needs OPENAI_API_KEY environment variable.
npx ai-bundle-check --help
How It Works
Scans your package.json and build output, identifies heavy dependencies, and sends the analysis to GPT-4o-mini. The AI knows common bundle bloat patterns and suggests specific optimizations like switching libraries or adding tree-shaking config.
License
MIT. Free forever. Use it however you want.