about
Built by
Axel.
I build and maintain HTML Viewer Cat from Norway.
I started HTML Viewer Cat in February 2026 as a place to paste HTML and see the result while editing.
Use the HTML viewer to open a file, edit a snippet or check a layout. CSS and JavaScript can go in the same document. You can download the result or share it as a link.
Rendering happens in your browser, drafts stay in your browser's own storage, and share links carry the HTML source. External resources in your document can still make requests. PostHog measures use with cookieless analytics by default. Read the why page or the changelog for more.