Show HN: WebMex – tmux-style tiling for the web

Hi HN! I built WebMex (https://webmex.app), a small tool that lets you split your browser into resizable tiles and load multiple webpages side-by-side — sort of a “multiplexer” for the web.

A few specifics: ---

- No login, no backend.

- Layouts are saved locally (in localstorage) under a unique name.

- You can re-open a saved layout via a URL, but it only works on your machine because nothing is stored or synced anywhere.

Why I built it: I kept ending up with messy window arrangements whenever I was researching or building something (docs + issues + dashboards + a couple reference tabs). I wanted a single workspace per project I could set up once and return to.

Why I’m posting: I’m not sure if this is still viable long-term. A growing part of the web blocks being embedded in iframes, which limits what you can actually tile inside a page. For sites that do allow embedding, it’s handy; for others, it’s a dead end.

So I’d love feedback on two questions:

- Do you see value in a tool like this at all? What workflows would you use it for?

- If yes: would you use an open-source browser extension that can tile real tabs/pages and avoid the iframe limitation, like the goal of this app?

Any thoughts on must-have features (keyboard shortcuts, layout sharing, presets, etc.) are welcome. I’m happy to build in the direction that’s actually useful.