Document links and QRs
Every file gets a short link and its own QR — and renaming has consequences.
Attach a file and it is published at your card's own address plus /files/ and a short name — ekard.app/aanya/files/price-list, say. That link opens for anyone: no eKard account, no login. Open the document from the Documents tab ("View" on its card) and the full address sits in the "Public link" field beside a "Copy Link" button; the tab's list shows a copy icon on each card too. The file displays in the browser — append ?disposition=attachment to force a download instead.
The slug is yours
The short name at the end — the slug — is set at upload with "Custom Link Name", or renamed later: press "Edit" on the document, change "Custom Link Name", press "Save Changes". A slug uses lowercase letters, numbers and hyphens, up to 100 characters, unique to the card; whatever you type is tidied into that shape, spaces and stray characters becoming hyphens. Left blank at upload, it is generated from the filename.
The edit screen warns: "Changing the link breaks copies you have already shared". The QR shown in the app regenerates to the new address by itself — but links you have sent and QRs you have downloaded or printed keep pointing at the old address, and the old address stops working. The same happens to every document when the card's own link changes (see Your link and your name).
A QR for every file
Moments after upload, each document gets its own QR code in the house style — a circular badge, rounded dots, the eKard logo at the centre, a "powered by ekard.app" footer. It sits on the document's page under "Share this document", captioned "Scan to open document". "Download QR" saves a PNG named after the slug: qr-document-price-list.png. Put it on a counter, a poster, a table — anyone who scans lands on the file.
What survives a change
Replacing the file — "Edit", then "Replace file" — keeps the link and the QR intact; the file you replace is gone for good. That is the right move for a menu or price list that changes: the codes you have printed keep pointing at the current file. New visitors see the replacement almost immediately; a browser that already opened the old file can hold onto it for up to an hour.
One more permanence: document QRs always encode the ekard.app address, never a custom domain. If your card is served from a domain of your own — should that domain ever lapse, every printed document QR keeps working regardless. See Custom domains.