Web Accessibility Checker & Repair Guide
Web & network Local only
Browser Compatibility & Baseline Checker
Dated local compatibility dataScan web code, evaluate Baseline and target browser support, and generate toolchain policies locally.
Dataset 2026-09-01
0Known features
0Target risks
0Limited features
0Unknown tokens
32Catalog features
baseline widely availableHTML, CSS and JavaScript source
Patterns are inspected as text and never executed.
Target evaluation
No matching known feature for this filter
How to use it
- 01
Choose a support policy
Target Baseline Widely or Newly available, a Baseline year, or explicit minimum core-browser versions.
- 02
Scan and investigate
Detect known features without executing code, separate unknown tokens, and inspect Baseline plus browser minimums.
- 03
Adopt the policy
Copy Browserslist and common build or lint configurations, then export a dated compatibility audit.
Frequently asked questions
What does Baseline Widely available mean?
It means a feature became interoperable across the core browser set at least 30 months ago; it is a broad signal, not a guarantee for every user agent.
Does the scanner execute my code?
No. It applies bounded deterministic patterns to the pasted text.
Is the feature catalog exhaustive?
No. It is a dated, curated catalog of high-impact features. Unknown or unlisted syntax must be researched and tested separately.
Can compatibility data replace real-device testing?
No. Browser versions, flags, embedded webviews, bugs, permissions and user settings still require testing against your actual audience.
Related tools
Keep working with other focused browser utilities.