Free tools
Free tools for site owners
Built by the Avvio team, free forever, no signup. If a tool shows you a problem — we're the people who fix it.
Website speed testLighthouse scores, Core Web Vitals, and the fixes that matter — in under a minute.Open tool →Website cost calculatorHow much does a website cost? Get an instant, honest estimate.Open tool →Meta tag checkerPreview any URL as a Google result and social card, with a tag checklist.Open tool →Cover & OG image generatorBlog covers, social cards, YouTube thumbnails — customize and download.Open tool →Favicon generatorEvery icon size, manifest, and HTML snippet from one image — zipped.Open tool →Screenshot beautifierWrap screenshots in a browser frame on a gradient — ready to share.Open tool →llms.txt generatorMake your site readable to ChatGPT, Claude & Perplexity.Open tool →