Privacy

What Preview Lab is

Preview Lab makes link previews and two-act links: a card that shows in a message thread, and a page behind the tap. It is a personal project, run by its owner. It sells nothing and shows no ads.

What we store

• The links you make: the words, colours and choices in them.
• Counts: how many times a link was opened or unfurled by an app, and which option people picked or voted for. Counts are totals, not people.
• Bots (Telegram, Slack): to edit a message in place, we keep the chat or channel id, the message id and the link. To count one vote per person, we keep a one-way hash of the chat-app user id. We do not keep names or message text.
• Notifications: if you turn on notifications for a link, your browser gives us a push address. We keep it with that link and delete it after the notification is sent, or when it stops working.
• ChatGPT and Claude: the tools only receive what the assistant sends them (a link, or the words for a new link).

What we don't store

• No accounts, no passwords, no payment details.
• No IP addresses or locations in the stats. To stop double counts, we compare a short-lived hash of the address and browser, in memory only.
• No selling or sharing of data. No tracking scripts or ad networks.

Who can see what

Anyone with a link can open it. The receipt for a link (who opened it, what they picked) is only shown to someone with its private receipt link.

Keeping and deleting

To have a link removed, send the owner the link (below). Bot and notification records are deleted when they are no longer needed, and are capped in size.

Contact

Contact the owner through github.com/TestDataGuy.