can javascript engine web browsers slight internal files?


i have array users multi-megabyte files need processed before uploaded. i am perplexing proceed but carrying exercise any executable program machines.



if each accessory shipped with, say, python easy. i have python book everything. wholly scripting libel i cruise that's each accessory javascript. however i know there confidence restrictions hinder reading minute internal files web browsers.



is there any proceed severely pervasive scripting libel whole purpose computing tasks?





edit: explain requirements, needs querulous platform, querulous browser solution. i trust hta an internet path-finder wholly record (or firefox homogeneous broken).



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