WebDevCalc
Free front-end dev calculators, no login
WebDevCalc launched on June 17, 2026 with 2 votes.
What it does
WebDevCalc is a free set of calculators and references for front-end work. Convert CSS units, plan responsive breakpoints, and brush up with short guides on Core Web Vitals, structured data, and Open Graph tags. Built for quick answers while you code, with no sign-up and nothing to install. Works on any device.
Free web development tools and generators: box-shadow, color contrast, favicon, meta tag, Open Graph, robots.txt, viewport. No signup, instant copy-paste output.
Front-end work is full of little calculations that break your concentration. Checking whether a grey passes contrast. Remembering which favicon sizes actually matter. Writing the Open Graph tags so a shared link stops looking broken. Working out a box shadow that looks like it belongs on a real surface. None of it is difficult, but stopping to look up a formula or hunt for a generator you trust adds up over a day. WebDevCalc collects those jobs into single-purpose tools that load fast and do one thing: a WCAG contrast checker, a robots.txt builder, a favicon set generator, meta tag and Open Graph generators, a CSS box shadow generator, and a viewport tag builder. Each tool sits alongside a…from webdevcalc.com
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