Ask any AI to generate a page as HTML, drop it into Terrarium, and send a link. No deployment, no hosting, no code — and teammates can comment right on the page.
No account needed to upload & share HTML pages. Log in to comment or make pages private.
The page your AI generated, sealed in a sandboxed iframe. Leave a note on it, regenerate, and a fresh version grows in seconds.
No deploy step, no copy-pasting code, no “works on my machine.” Generate, plant, share.
Claude, ChatGPT, Gemini, any of them. End your prompt with and you get a real, working page back instead of a wall of code.
Drop the .html file or paste the snippet. It renders exactly as built and seals under glass, sandboxed and served from an isolated origin. You get a live link in seconds.
Send the link. Anyone who opens it can look in with no account, and one Google sign-in lets them comment right on the page. Edit and regrow in about 30 seconds, or take a cutting to branch a version.
Untrusted AI code, shared with one link, with feedback that lands on the page itself.
Untrusted AI code stays put. The glass is a sandboxed iframe with no same-origin access, served from an isolated origin. Scripts cannot reach you or your viewers, so any page is safe to hand to anyone.
From file to link in seconds. No build step, no repository, nothing to configure. Drop it and it is live.
A link that talks back. Anyone with the link can read the notes; one Google sign-in and they can comment right on the running page.
Each specimen kept under glass, labelled, alive. Come back to prune, take a cutting, or read the latest notes.
every specimen labelled · notes waiting when you return
Yes. Planting pages, sharing links, and commenting are all free — no card, no tiers, and no account needed to publish your first page.
No. Anyone with the link can open the page and read every note. Posting a comment takes one Google sign-in, so each note has a name on it.
Until you prune it. Pages don't expire — delete a page and its link dies with it, keep it and it keeps growing.
Both. Log in and any page you own can be flipped to private or deleted from its sidebar. Public pages are visible to anyone with the link, and only ever editable by you.
That's what the glass is for. Every page renders inside a sandboxed iframe served from an isolated origin — its scripts can't reach your account, your cookies, or your viewers.
Plant your HTML, get a link, and find out what people think, in the next minute.