🌐Web Tools

Web tools for the small front-end work that interrupts a build: validating and formatting HTML, CSS, and JSON on the way into a CMS, converting pixel values to relative units for a responsive layout, and the structural checks that catch silly mistakes (missing alt text, deprecated tags, mismatched braces in stylesheet rules). The category is intentionally browser-only; nothing here requires installing a local build environment. The common misconception worth unlearning is that em and rem are interchangeable units; em compounds against the nearest font-size ancestor and rem is always relative to the root, which is why the Px to Em Converter (under design and web) reports both side by side and asks for the relevant root size only once. If you are new to the category, start with the Web Code Validator and Formatter on any handwritten markup before publishing, and the Px to Em Converter the first time a layout needs to scale gracefully to large or small viewports. The category is small on purpose; the goal is to cover the cases that are common enough to need a tool but small enough that nobody wants a dedicated build pipeline for them. Larger tasks (linting an entire repo, running a full accessibility audit) belong in a real local toolchain, not in a web utility.

2 tools available