HTML Clay

Simple Apps. One File.

A whole app in one local HTML file. Anyone can make one, because it's just HTML.

Download
Free. No account. Works offline.

A file you own

One file, start to finish

Email it, back it up, drop it in any folder. No account, no cloud, no app store. The file is the whole app, and it belongs to you.

Your changes stick

Jot a note, check a box, drag things around. It saves itself right back into the file. Reopen it next week and it's exactly as you left it.

Quiet and private

It runs entirely on your computer. No sign-up, no tracking, nothing leaves your machine. It even works on a plane.

How it works

Install HTML Clay

One small, free app. One time.

Double-click a file

Any .htmlclay file opens in its own clean window. No browser tabs, no clutter.

Just use it

Type, edit, organize. It saves automatically, back into the same file.

It's just a web page

Rename it .html and it opens in any browser. HTML Clay only adds one thing: the ability for the page to save your edits back into the file.

What people make

Is it safe?

As safe as a web page. It runs in your browser's sandbox and the only file it can change is its own. The one real risk is the same anywhere online: be cautious if a page asks you to download and run a separate program.

Download v1.1.1

macOS Universal (Apple Silicon + Intel)
HTMLClay-1.1.1-universal.dmg

The simplest way to make and run software.