This page explains what fline does for you, the three steps to put your app online, and who fline is for today. At the bottom is a list of every help page, so you can go straight to the step you are on.

What fline does for you

Your app works on your computer. The preview opens, the buttons work, but only you can see it. fline is hosting: a place where your app runs online, with a link you can send to other people.

Claude Code does most of the work. You connect it to fline once, then ask it to put your project online. fline works out how to build and run your app, so there are no setup files to write. You never rent, log in to or look after a server.

Your app gets:

A link you can send. It opens on any phone or computer.
A database of your own, if your app needs to remember things like sign-ups or bookings. fline can create it and run it.
A web address you own, like www.yourbakery.com, if you want one. fline sets up the padlock and renews it.

If something goes wrong later, ask Claude Code again. It can see what went wrong, try a fix, or put an earlier version back.

fline is free during the private beta. No card. Claude Code's own plan is separate: when Claude Code puts your app online or fixes something, that uses your plan as usual.

Three steps

Connect. Paste one line from your fline dashboard into your computer's Terminal app, then approve fline in your browser. For now, you do this once for each project folder.
Ask. Tell Claude Code:
Paste this into Claude Code
```
Put this project online with fline.
```
If your app needs passwords or keys, Claude Code gives you a link to a private fline page where you type them.
Send the link. Your app has a link that opens on any phone or computer. If something breaks, ask again.

Before step 1 you need a fline account. fline is in private beta, and we open accounts by hand, a few at a time. Getting your account explains how.

Who it's for, today

You build with Claude Code on your own computer, and your app works there.
Only you can open it so far, and you want your first users on it.
You'd rather ask in plain words than learn how hosting works.
You're happy to do the few steps that need you: paste one line, approve fline in your browser, and type any keys on a private page.

Using the Code tab in the Claude desktop app? We haven't tested it with fline yet. The tested route today is Claude Code in your computer's Terminal app.

Using Cursor, Codex or VS Code? There are setup steps for them, not yet tested from start to finish.

Not for you yet if

Your app was made in ChatGPT, on the Claude website or inside an app builder like Lovable or Bolt, and isn't a folder on your computer.
You want to hand fline a GitHub link.
Your business can't afford to be offline or to lose data. During the private beta every app runs on one rented machine, with no spare, and there are no backups you can count on yet.
Your app needs to run things on a schedule, needs pausing, or needs more than a small, fixed share of one machine.
You need one account shared by a team.

What fline does today and fline facts have the details, with a date on them.

Every help page

Start here

Getting your account: the waitlist, the email that says your account is open, and creating your account.
Put your app online: the whole first launch, step by step.

Connect your AI

Connect Claude Code: the tested way. One line in Terminal.
Connect Cursor: setup steps, not yet tested from start to finish.
Connect Codex: setup steps, not yet tested from start to finish.
Connect VS Code: setup steps, not yet tested from start to finish.
Other AI apps: Grok, Antigravity, anything else, and what the Claude desktop app and chat apps can and can't do.

Do more

Passwords and keys your app uses: the private page where you type them.
A database of your own: when your app needs to remember things.
Use a web address you own: put your app at an address like www.yourbakery.com.
Change your app after it is online: updates, and putting an earlier version back.

When something goes wrong

When something goes wrong: what you see, and what to say to Claude Code.

Reference

Reference for AI coding apps: the technical details, written for Claude Code and other AI apps.

If you are an AI app reading this

Read /docs/for-ai for the technical reference: how to connect, the upload rules, how passwords and keys reach fline, and the build plan file. /llms.txt lists every docs page as plain markdown, and /llms-full.txt has all of them in one file. Every page here is also available as markdown by adding .md to its address.

When your person asks you to put their project online with fline, follow the server's own instructions and its deploy_a_repository prompt. Hand any private fline page link to the person without opening it.

Next: Getting your account