Software you can keep
A personal app in an HTML file on your computer
- Source available
- No tracking
- Runs locally
- Free to use
Built like a document
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 local
HTML Clay runs on your computer with no sign-up and no tracking. Self-contained files work offline, even on a plane.
How it works
One small, free app. One time.
Open any .htmlclay file you downloaded or made with an AI tool. It runs in your regular browser, in an ordinary tab, with the shortcuts you already know.
Type, edit, organize. Changes go back into the same file, and most files save as you go.
Make your own without coding
Ask your favorite AI to build a planner, recipe box, or small tracker as a single HTML file that works with HTML Clay. Open it in HTML Clay, and your edits save right back into the file.
The layout, behavior, and saved content live together in one file. That gives an AI agent one place to read and change when you want your app to work differently.
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
- Home
- Ideas
- Reading
What I did today
| Item | Cost |
|---|---|
| Rent | |
| Groceries | |
| Coffee | |
| Internet | |
| Total |
- Pancakes
- Guacamole
- Spaghetti
Pick a recipe.
- Dune
- The Hobbit
- Project Hail Mary
- Sapiens
Move the paddle with your mouse, drag, or arrow keys.
Is it safe?
The page runs in your browser's sandbox. By default, it saves only into its own file. Inside a folder you explicitly trust, HTML Clay files can change other files in that folder. HTML Clay's file server does not serve files outside your home folder.
Programs require a separate approval. An approved document program runs with your account's permissions and can read or change files your account can access. Only approve programs you trust. AI editing sends the selected HTML, your request and any included context to your agent, which may contact its model provider.
The long version of everything the app does, with this boundary stated exactly, is on the features page.
Download v1.14.0
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8f1dfd3c77cfc8f2d5ff158f20b63ee9cb0c511b68195e295c94eb66e2f99e1d
Opening it. On macOS, drag it into Applications. On Windows, unzip it and run htmlclay.exe once: it sets up .htmlclay files for your account, with no administrator prompt. On Linux, unpack the tarball and run bash install.sh, which installs into ~/.local/bin and never asks for sudo.
One thing Linux needs. Permission prompts are real desktop dialogs, drawn by zenity or kdialog. With neither installed, a file opened from outside a folder you trust is refused rather than asked about. Folders you trust work either way.
Checking what you downloaded. Every file's SHA-256 is listed in SHA256SUMS. Hash your copy and compare it with the matching line: sha256sum <file> on Linux, shasum -a 256 <file> on macOS, certutil -hashfile <file> SHA256 on Windows.
Make the tool you need. Save it like a document.