Free code editor/preview, no ads, no login, single HTML file or Split
Yet another browser code playground, but shares snippets via URL hash instead of DB.

Annotation-to-HTML-comment conversion is neat, but CodePen and JSFiddle already exist.
Frontend developers and AI prompt engineers testing quick HTML snippets
CodePen · JSFiddle · StackBlitz
Yet another browser code playground, but shares snippets via URL hash instead of DB.
Yet another self-hosted Pastebin, but the CLI integration is actually decent.
Embeds DOM selectors in markdown comments so scrapers don't need LLM on every run.
Finally, a way to preview Ghostty themes without editing config files manually.
Client-side email renderer, but remove.bg-style single-purpose tool—MJML and Litmus do this.
Yet another screenshot-to-code tool competing with v0.dev and Builder.io.