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About Nu Html Checker
Nu Html Checker is the W3C's web-based validator for modern HTML. You can check a page by entering its address, uploading a file or pasting markup. It then reports errors and warnings against the current HTML conformance rules.
Options can show the document source, a heading outline and an image report, or limit the output to errors and warnings. You can also check error pages and set the User-Agent and Accept-Language headers sent with the request. The W3C describes the tool as an ongoing experiment whose behavior may change.
Strengths
- Checks against current HTML conformance rules rather than old doctypes
- Accepts a URL, a file upload or pasted markup
- Optional outline, image report and source views
- Can send custom User-Agent and Accept-Language headers
Limitations
- Checks one document at a time
- Behavior is described as experimental and subject to change
Details
- Pricing
- FreeFree to use on the W3C website.
- License
- Proprietary
- Developer
- W3C
- Platforms
- Web
- How it runs
- Web application
- Account
- Not required
- Works offline
- No
- Best suited for
- Web developers checking that a page's HTML is valid
- Categories
- Developer tools, Website testing
- Last verified
- Added
- Provenance
- Selected from the TechWalrus Resource Hub (Website Checkers & Audit Tools); facts checked against the developer's own pages, 2 sources on file.