Free · Build it yourself

You build it, we host it

Write the code yourself or hand it to the AI you already use. Start with a prompt that has our rules built in.

Don't want to touch code at all? Describe your idea and it gets built here, then you play it and change what's off.

The rules

Four things your files have to be. Everything else is up to you.

No internet The sandbox blocks every outside request, so bundle what you need. Anything phoning home just won't run.

Opens index.html That's the entry file. Everything else loads from it.

No cookies or logins It runs in a locked sandbox — no pop-ups, no top-level navigation.

20 files, 20 MB 5 MB per file. html, css, js, json, png, jpg, webp, mp3, ogg, wav.

Working in an AI that can read a URL? Point it at fidgit.app/build.txt for the full spec.

Tell us what you're making

The more specific you are, the closer the first version lands. This all goes into the prompt.

Primary section — which of the feed's buckets does it fit best?
Secondary section — optional Which devices is it for? — your AI builds the controls to match, and we rate how well it really plays on each
Does it need any of these?
Describe it — what the player does, how it looks, how it feels
Paste it into Claude Code (what we'd use), or ChatGPT, Gemini, Cursor, v0 — anything that writes files.
Build it

Paste the prompt in and let it work. Expect a few rounds — the first version is a starting point, not the finished thing.
- Play it after every change. Bugs are much cheaper to find early.
- Ask for one change at a time. Big vague requests come back vague.
- Tell it what feels wrong, not how to fix it. It's better at fixes than you'd think.
Test it properly

Open it on a phone if it's meant for phones. Reload it. Let someone else try it cold. Whatever breaks here would have broken in public.
Submit it

Export every file your fidgit needs, make a 1200×675 thumbnail if you want it to get clicked, and upload. Review takes a few seconds, then it's on the front page.
Submit your fidgit →

Describe what you want and it gets built here, on fidgit.