Kernline
Kernline vs CSS Peeper
Prices checked 9 November 2026 on csspeeper.com/pricing.
CSS Peeper is a polished sidebar for colours, type, and assets, with a generous free tier. Kernline is a better fit when you need exportable Tailwind classes, full-page design tokens, Copy for AI for Cursor or Claude, and component capture on only the tab you open, without broad host access at install.
| Topic | CSS Peeper | Kernline |
|---|---|---|
| Pricing | Free forever; Professional from ~$2.49/mo billed yearly; Ultra ~$4.99/mo billed yearly (csspeeper.com) | Free tier; Pro $36/year, $6/month, or $59 Lifetime |
| Visual inspection | Strong colour and typography tools | Box model, flex, grid, typography, colours |
| Tailwind export | Not primary | v3/v4 per element; Pro page scan and variants |
| Copy for AI | No | Prompt-ready HTML, styles, tokens, states |
| Component capture | No | HTML, React, or Vue |
| Asset export | Palette and assets on paid tiers | List and download; Pro bulk SVG and ZIP |
| Permissions | Extension model per store listing | activeTab; per-domain optional host access |