Small tools,kept local.

Your data stays with you.

Every tool on this page follows the same rule. It loads once, then runs entirely in your browser. What you put into it is stored on your own device, in the browser’s own database, and is never sent to a server. There is nothing to sign up for, nothing to pay for, and nothing watching.

Each tool can export everything it holds as a plain JSON file, import that file back, and delete every trace of itself on request. The hosted copy here is a convenience, not a dependency: the files can be copied to any web server, or to a folder on your own computer, and they keep working.

• What leaves your deviceListed below ↓
• Network activityOpen the developer tools and watch →
• The codeReadable, unminified, MIT →

What leaves your device: nothing you typed.

Where each kind of information goes, for every tool on this page.

Your library, progress, notes and goals

Stored in your browser’s database (IndexedDB) on this device. Removed when you choose Delete all data inside the tool, or when you clear this site’s data in your browser.

Small preferences

Stored in the browser’s local storage on this device, for things like a remembered sort order.

Exports

Written to a file you choose. They go wherever you put them.

Typefaces

This index page loads two fonts from Google Fonts, which sees that request like any other web page would. The tools themselves bundle their own typefaces and load nothing external at all.

Analytics, cookies, trackers

None. Not on this page, not in the tools.

Hosting

The files are served by a static web host, which, like any host, keeps ordinary server logs of which files were requested. None of what you enter into a tool is in those requests.

Because the data lives in one browser on one device, it does not follow you between devices or browsers. Export a backup to move it, and export one occasionally anyway.

Take it with you.

Each tool is a folder of static files. Save the folder, put it on any web server or open it from your own computer, and it runs. Every tool ships with a README that explains what it stores, how to export and delete that data, and how to build it from source.

The code was written with AI assistance and reviewed by Zach. It is released under the MIT licence, so you may copy it, change it, and pass it on. Each tool’s source is downloadable from inside the tool, next to the explanation of what it stores.