readable

Legible, possible to read or at least decipher.

If that sign were still readable we'd know where we are!

Which can be read—i.e. accessed or played—by a certain technical type of device.

No sale, those aren't readable with my DVD-player!

Enjoyable to read, of an acceptable stylistic quality or at least functionally composed.

These assembly instructions aren't readable, I still don't have a clue how to start!

I have been twice at the Museum looking out for Friedrich Books,—that I might examine them a little, and see whether they were worth buying. […] I have got a rather curious new German Book upon Naples and Masaniello (chiefly) whh often made me remember you. To one who knows the streets edifices &c the thing may be readabler: I mean to send it you to Scotsbg the day after tomorrow, along with my Mother’s Magazine.