How to get your Claude Code app online and share it

Your app works on your computer, and now you want other people using it. To get your Claude Code app online, it needs a host: a place online where a copy of it runs, with a link anyone can open. Claude Code can do most of that setup for you, once you connect it to a host and name that host when you ask. I build fline, hosting for apps made with Claude Code, so this page shows the steps with fline and says plainly what it does today.

Why can only I open my app right now?

The preview runs on your own computer, at an address only your computer can open. Nobody else can reach it, and it stops when your computer sleeps or the preview is closed. A host runs a copy of your app where other people can reach it and gives it a link you can send. More in why an app only works on your computer.

Can Claude Code publish it by itself?

Partly. On paid Claude plans, Claude Code can publish a single page, called an artifact, at a private link on claude.ai that you can share. Anthropic's guide to Claude Code artifacts describes an artifact as one self-contained page with no backend, the part of an app that runs behind the page, and says a tool with a backend belongs on hosting of your own. It also says an artifact can't sign people in by itself.

So if the app in your project folder has its own database, a sign-in or keys for other services, it needs a host. When you ask Claude Code to put it there, name the host, or it may pick a different one. Can Claude host my website? covers what each part of Claude can put online.

How to get your Claude Code app online with fline, step by step

There are four steps, and none of them is coding.

1. Get an account. fline is in private beta, and accounts are opened by hand, a few at a time. Ask for early access with your email address, and fline emails you when your account is open. Create your account with the same address, then open your fline dashboard once to set it up. Getting your account walks through each step.

2. Connect Claude Code. Your fline dashboard shows one line, with a button to copy it. Open your computer's Terminal app, go to your project folder, paste the line, then approve fline in your browser. Connect Claude Code has every step.

3. Ask. In your project folder, start Claude Code and tell it:

Put this project online with fline.

Claude Code packs up a copy of your project folder and sends it to fline, and it may ask your permission first, which is expected. fline works out how to build and run your app, so there are no setup files to write. To do that, fline sends parts of your code to an AI model made by OpenAI, and the passwords and keys you save on fline never go to that model.

4. Send the link. When your app is ready, your dashboard shows its link, and Claude Code gives it to you too. Check it on your phone, then send it to your first users. Put your app online walks through a whole first launch.

What about keys, a database and my own web address?

Each of these can need a small step from you.

• Keys. If your app uses a password or key, like a payment key, Claude Code gives you a link to a private fline page. You type the key there, not in the chat, and Claude Code sees that you did it, not what you typed. The page works once, for 10 minutes. If you paste a key into the chat instead, Claude Code sees it. More in where your API keys should go.
• A database. If your app needs to remember things, like sign-ups or bookings, Claude Code can have fline create a database of your own, and fline runs it. More in a database for your app.
• Your own web address. The link starts out long, ending in apps.dev.fline.sh. You can also put your app at a web address you own, like www.yourbakery.com, by adding one record at the company where you bought it. fline sets up the padlock and renews it.

What if something breaks after it's online?

Ask Claude Code again. If a launch or an update fails, your fline dashboard says so, and one button copies the problem for Claude Code. Claude Code can see what went wrong, try a fix, or put an earlier version back, though fline can't promise it finds the fix. When you update your app later, the current version keeps running while the new one is prepared.

Where fline fits

fline is hosting for apps you build with Claude Code on your own computer: the step after it works. It's independent, and isn't made by Anthropic. Claude Code in Terminal and the Code tab of the Claude desktop app are tested with fline from start to finish, and so is Codex. fline is free during the private beta, with no card. Claude Code's own plan is separate: its work on your app uses your plan as usual.

A few things it doesn't do yet. Your project has to be a folder on your computer, so fline can't take an app straight from a chat or an app builder. The link is public, so an app that holds private information needs its own sign-in. During the beta every app runs on one rented machine with no spare, with no uptime promise and no backups you can count on, so keep your own copy of anything you can't lose. What fline does today has the full list, with a date on it.

Built it with Claude Code, and it runs on your computer? Ask for early access.

Questions people ask

Can Claude Code host my website?

Not as a full app. On paid Claude plans, Claude Code can publish a single page as an artifact, at a private link on claude.ai that you can share, but Anthropic describes an artifact as one self-contained page with no backend. An app with its own database, sign-in or keys needs a host. Once connected to one, such as fline, Claude Code can do most of the setup.

How do I share my Claude Code app with others?

Put it on a host, such as fline, then send the link. On your own computer the preview opens only for you. On a host, your app gets a link that opens on any phone or computer, and you can put it at a web address you own, like www.yourbakery.com. The link is public, so give your app a sign-in if it holds private information.

Do I need to know how to code to put my app online?

No. With fline a few steps need you, and none of them is coding. You open your fline dashboard once, paste one line from it into your computer's Terminal app, and approve fline in your browser. You type any passwords or keys on a private fline page, and add one record at your domain company if you want your own web address. Everything else, you ask Claude Code for in plain words.

What does it cost to put my Claude Code app online with fline?

fline is free during the private beta, with no card. There's no price and no billing yet, and fline's terms say any future price applies only from then on, so your time in the beta won't be charged later. Claude Code's own plan is separate: when Claude Code puts your app online or fixes something, that uses your plan as usual.

Can I use my own web address?

Yes. A www address, like www.yourbakery.com, works with any domain company, and fline sets up the padlock and renews it. You add one record at the company where you bought the address. Your fline dashboard shows which record and keeps checking for 48 hours, and Claude Code can attach and check the address for you. An address without www works today only if your domain is with Cloudflare.

Does this work with the Claude desktop app?

Yes, in the Code tab. The Code tab runs Claude Code, and it's tested with fline from start to finish. You connect it with the same one line in Terminal that Claude Code uses, then ask in the Code tab. The Chat tab can't send fline a project, so an app made only in a chat can't go on fline today.