How to use it
- Add a site. Paste an address into the field and press Add. Paste a YouTube, Google Maps or Spotify link and you get the player, not the page.
- Pick a layout. Grid shares the space evenly, Columns puts everything side by side, and Focus gives the first site two thirds of the screen.
- Rearrange. The star on a tile moves it to the front — the big spot in Focus.
- Keep it. Copy link gives you an address that reopens the same set. Full screen hides everything but the sites.
Why some sites won’t load
Any site can tell browsers not to show it inside another page, and most sites with a sign-in do: Google Search, Gmail, Docs, GitHub, Reddit, Slack, Notion and X all refuse. The viewer checks every address first, and a refusing site gets a tile that says so rather than a blank rectangle. The embed checker shows exactly which header decided it.
Plenty of useful sites do allow it: Wikipedia, Excalidraw, tldraw, Desmos, caniuse, CodeSandbox, and weather maps like Ventusky and earth.nullschool.net — plus the players for YouTube, Vimeo, Twitch, Spotify and Google Maps.
Other ways to see several websites at once
On a Mac you can tile browser windows into halves and quarters, use full-screen Split View for two, or use the split view that Chrome, Firefox and Zen now have built in. Each has a limit, and none of them keep the arrangement once you close the windows. All five ways, compared.
When six isn’t enough
This viewer is a small taste of how Tabula works. In Tabula every site is a live tile on one infinite canvas — including Gmail, GitHub and the others that refuse frames, signed in like any other tab. Place them wherever suits you, size them however you like, and they are still there the next time you open it.
Questions
Is the multi-site viewer free?
Yes, and there is no account. Your set of sites is kept in the page’s address, so you can bookmark or share it, and in your own browser so it is still there next time. Nothing about it is stored on our side.
Why is a site blank, or asking me to sign in?
Blank usually means the site forbids framing — the tile says so when that is the case. A sign-in screen means the site allows framing, but your browser keeps its cookies away from framed pages, so you look signed out. Both are the browser protecting you, and neither can be switched off from here.
Can I watch several YouTube videos at once?
Yes. Paste ordinary YouTube links and each becomes its own player. For live streams, including Twitch and Kick, the multi-stream viewer adds a focus layout and one-click sound switching.
Is it safe to open sites here?
Each site runs in its own sandboxed frame: it cannot read the other sites, cannot read this page, and cannot navigate this page away. Every tile shows the address it is really displaying, and a shared link does not load anything until you choose to open it.
Can I add more than six sites?
Not here — past six, every tile gets too small to read in one browser tab. Tabula has no fixed limit: its canvas is infinite, and you zoom out to see everything or in to work in one.