12 breakpoints tested in 8 min
Coasty opens your site at every breakpoint, from 320px mobile to 2560px ultrawide, screenshots each view, identifies layout breaks, overflow issues, and responsive failures, then suggests specific CSS fixes for each problem.
How it works
- 01
Enter your URL
Provide the pages to test: homepage, key landing pages, or your entire site.
- 02
Every breakpoint is tested
Each page is rendered at 12 viewport widths: 320, 375, 414, 428, 768, 834, 1024, 1280, 1440, 1680, 1920, and 2560px.
- 03
Issues are captured
Layout breaks, text overflow, image distortion, touch target sizes, and spacing issues are screenshotted at the exact breakpoint where they occur.
- 04
Fixes are suggested
Each issue comes with a specific CSS fix suggestion (media query, flexbox adjustment, or spacing change) ready to implement.
What you get
Try it yourself
Test the responsive design of mysite.com at every breakpoint from 320px to 2560px. Screenshot every layout issue and suggest the exact CSS fix for each one.