Jun 28, 2021 Best Standalone: Doxie Go SE. Buy on Amazon. One of the fastest portable scanners in the market, the Epson WorkForce ES-50 can scan a single page in as little as 5.5 seconds. And, despite its small size at 1.8 x 10.7 x 1.3 inches, the single-sheet-fed scanner can handle documents up to 8.5 x 72 inches, as well as ID cards and receipts