What is keepsake?

Keepsake is a single HTML page that turns an exported WhatsApp chat into a private, browsable memory archive. A person exports a chat as a .txt or .zip file from WhatsApp, opens that file in this page, and everything, including reading, searching, and displaying photos or voice notes, happens entirely inside their own browser. Nothing is uploaded anywhere, and closing the browser tab clears the data, since there is no server involved at all. The page can read both iOS and Android export formats, including messages that span multiple lines and system notices like someone joining a group. If a chat was exported with media included, it unzips that file in the browser and shows photos, videos, and voice notes inline as chat bubbles styled to look like WhatsApp itself, with a teal header and colored message bubbles. Users can choose whose messages appear on which side of the screen and can search the full conversation or filter by sender. Beyond just viewing the chat, Keepsake adds some extra touches: it counts messages, tracks the longest streak of active days, and shows the most used words. It also has an "on this day" feature that pulls up a message from the same date in a past year, and a year in review summary with a monthly chart, busiest month, and top emoji or word. The parsed archive can be saved as a JSON file, and the whole conversation can be printed or exported as a clean PDF formatted for standard paper. To use it, someone just opens the index.html file in a browser directly, with no installation or build step required. It can also be hosted as a static website, for example through GitHub Pages. Loading a plain text export makes no network requests at all, though loading a zipped export does pull in a small unzipping library from a public content delivery network.