This is an offline-first web application powered by Svelte and Skeleton that I implemented in my free time to scratch my own itch. It is quite minimal for now, but I still hope that you can find it useful to you. Please let me know if you want to suggest any improvement. The source is available at: https://github.com/thanhnguyen2187/crypta. Feel free to open an issue/create a pull request.

Many thanks!