Right-size product photos for the marketplace, the storefront, or the email newsletter.
The everyday operating tools of a one-to-five-person business: shrink a product photo for the marketplace, generate a QR code for the storefront, check the exchange rate before quoting a customer, generate UUIDs for an import, summarize a competitor blog post, count the words on a product description. Cheap, fast, and your inventory photos never leave your device.
Most listings expect a square image, and a long edge of at least 1000px is the usual floor - some platforms only turn on zoom above 2000px. Export the exact ratio your platform asks for and check its current spec, because the numbers change.
Only if you scale up. Resizing down from the original is safe; enlarging invents pixels that were never captured. Keep the camera original somewhere and resize a copy for each channel.
Yes. Email clients rarely render wider than about 600px, and heavy images hurt load time on mobile. Make one wide version for the storefront and a smaller one for email rather than sending the largest file everywhere.