yayftp

Your web servers, in a browser tab and in Claude.

YayFTP is a free FTP, SFTP and Azure client that runs in your browser. Use it yourself, or connect it to Claude and let Claude read, edit and deploy files on your sites for you. Either way, every file that gets replaced is backed up first.

Open YayFTP Connect it to Claude

Free. Nothing to install. The FTP client works without an account.

Two ways to use it

Same account, same saved sites. Work on your files yourself in the browser, hand the work to Claude, or do both.

Free web app

An FTP client that lives in a tab

The two-pane layout you know from desktop FTP clients, without installing anything. Open it on any computer and pick up where you left off.

  • FTP, FTPS, SFTP with passwords or key files, and Azure App Service
  • Drag and drop uploads and downloads, with a transfer queue
  • Several servers open at once, each in its own tab
  • A built-in code editor for quick fixes on the server
  • Link a folder on your computer to a site, and it is there next time
  • Saved sites, with passwords and keys encrypted on our server
Open YayFTP

Works in any modern browser. Chrome and Edge add live local folders.

Claude connector

Let Claude work on your sites

Add YayFTP to Claude once. From then on you can ask for a change in plain words, and Claude makes it on the live server using the sites you saved.

  • Claude lists your saved sites and browses their folders
  • Reads the current version of a file before it changes anything
  • Writes edits, new pages and new folders
  • Copies files, or snapshots a whole site before big changes
  • Backs up every file it overwrites or deletes
  • Never sees your FTP passwords: you approve a sign-in instead
Set it up

Needs a free YayFTP account and a Claude plan that supports custom connectors.

What you can ask Claude to do

Name the site and describe the change. Claude reads the live files first, then makes the change. Want to approve each one? Just say so.

  • Our hours changed. Update them on every page.edits 6 files, 6 backups saved
  • Add a contact page that matches the about page.reads about.html, creates contact.html
  • Before you touch anything, snapshot the whole site.copies /public_html to /snapshot-2026-10-22
  • The contact form throws a PHP warning. Find it and fix it.reads contact.php, patches one line
  • Which pages still say 2024 in the footer?reads 14 files, lists 3
  • Undo that last change.restores footer.php from /.yayftp-bak/

Connect YayFTP to Claude

About five minutes, most of it finding your FTP password.

  1. Save your site

    Create a free account, open the Site Manager, and add your FTP, SFTP or Azure login. Connect once to make sure it works.

  2. Add the connector

    In Claude, open Settings, then Connectors, and add a custom connector with the URL https://yayftp.com/mcp. Click Connect and sign in to YayFTP when asked.

  3. Ask for a change

    Start a chat and try: “List my YayFTP sites.” Then name a site and say what you want done.

Using another AI agent or your own code? The connector is a standard MCP server. See the connector docs for the tool list and API details.

Made for sites where the server is the source of truth

Shared hosting, WordPress themes, client sites from years ago, the PHP app nobody ever put in Git. If you change those by opening an FTP client, YayFTP gives you a better one, and lets Claude do the same work with the same access you already have.

A backup before every overwrite
The old version goes to /.yayftp-bak/ on your own server, blocked from public view, so any change can be rolled back.
Your passwords stay with us, not with the AI
Saved passwords and keys are AES-256 encrypted and only decrypted on our server at the moment of connecting. Claude connects through a sign-in you approve and can be disconnected any time.
Claude only touches what you saved
It can reach the sites in your Site Manager and nothing else, and every path stays inside each site’s folder.
Your files are not stored by YayFTP
Transfers pass through to your server. We keep account details, your saved sites and a short activity log. See the privacy policy.

Questions

Is it really free?

Yes. The web app and the Claude connector are free to use. If paid plans are added later, they will be for extras, and the terms say how we would let you know.

Do I need an account?

Not for the FTP client: type a host and connect. An account lets you save sites, and it is what Claude signs in to.

Can Claude break my site?

It can only change files on sites you saved, and replacing a file needs an explicit overwrite. Tell Claude to show you each change before making it, and it will. If something still goes wrong, the previous version of every replaced or deleted file is in /.yayftp-bak/, and you can ask Claude to put it back.

Which Claude plans work?

Any plan that lets you add a custom connector in Settings. On Team and Enterprise plans, an admin may need to add it for the organization first.

Can I stop Claude from using YayFTP?

Yes. Remove or disconnect the connector in Claude’s settings. Access ends right away and your saved sites stay as they are.

Open it now, or connect it to Claude.

Free, nothing to install, and a backup behind every change.

Open YayFTP Connect to Claude