Primary job
Identify and learn conventional UI and UX pattern names from screenshots.
Learn what the UI patterns in a screenshot are called.
CatchUI is a bilingual web app that turns interface screenshots into UI vocabulary lessons. It identifies recognizable patterns, explains the evidence behind each label, and connects results to a curated learning catalog.
CatchUI at a glance
Audience
Design students, career-switchers, product managers, developers, and working designers.
Languages
English and Simplified Chinese across the interface and curated definitions.
Catalog
28 curated patterns spanning navigation, input, action, overlay, feedback, content, and data families.
How it works
1
Drop a screenshot
Use an app, website, or dashboard screenshot, or open the built-in sample.
2
Inspect the matches
Model-assisted recognition finds one or more visible patterns and explains the evidence for each label.
3
Learn the vocabulary
Open the linked catalog card for the proper name, definition, related patterns, and usage tradeoffs.
4
Keep what matters
Save useful cards and screenshot examples to a personal Library, then review them with spaced repetition.
What CatchUI is not
CatchUI is not a screenshot-to-code generator, design-cloning service, or generic inspiration gallery. It is a vocabulary and learning tool.
Frequently asked questions
What is CatchUI?
A bilingual UI vocabulary app that identifies recognizable interface patterns in screenshots and teaches their conventional names and purposes.
Can CatchUI identify multiple UI components from a screenshot?
Yes. A result can contain multiple recognizable patterns, each with its own label, visible evidence, confidence, and screenshot region.
Does CatchUI generate code from screenshots?
No. CatchUI identifies and explains interface patterns; it does not recreate an interface or turn the screenshot into code.
Can I try CatchUI without signing up?
Yes. The catalog and built-in sample are public. Screenshot scans are subject to free or paid-plan quotas.
Are CatchUI results always correct?
No. Recognition is model-assisted and can make mistakes. The teaching catalog is curated, and detected names can be corrected.
Which languages does CatchUI support?
The interface and curated pattern definitions are available in English and Simplified Chinese.
How much does CatchUI cost?
The catalog and built-in sample are free without sign-up. Anonymous visitors can run up to 3 screenshot scans per day, a free account includes a 30-scan pool, and CatchUI Pro is $6/month or $60/year with 300 scans per day.
Facts on this page last verified: 2026-08-02.