[[File:Jsmess in Chromium.png|thumb|upright=1.3|JSMESS emulating a CPC6128 in Chromium 30 on Linux (with copious debug messages)]]
[[File:Jsmess firefox zoomed.png|thumb|upright=1.3|JSMESS in Firefox 24 (same rendering resolution but using page zoom to enlarge the CPC screen)]]
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'''JSMESS''' ("JavaScript MESS") is a JavaScript translation of [[MESS]] that runs in modern web browsers like Chrome and Firefox and is . Despite being in its public beta stage right now, JSMESS is already used by the Internet Archive to make their Historical Software Collection playable in web browsers.
Emulation speed is about 100% in Firefox and a little slower (as evident from the slower CPC startup messages) in Chrome when running the browsers on an entry-level 2012 PC. JSMESS is already quite usable with the The chief remaining issues being of JSMESS are spotty sound support and some bad keymapping.
==History and development roadmap==