jZebra is a Java applet that allows you to print barcodes, receipts, and more from a Web page. It sends raw print commands to your printer. It has been tested with Firefox, Safari, Internet Explorer, and Opera. It supports parallel, USB, and network printers.
This release fixes some weird behavior when RegEx characters are used with a printer search, adds HTML printing support for LaserJets, InkJets, and DeskJets. It fixes a print margin bug with PDFs. It includes experimental image printing, including base64 or URL printing, JPEG, PNG, etc. for ESCP, PSCP, and ZPLII capable printers.
URL: jzebra - Free browser applet for sending raw commands to your printer - Google Project Hosting