Some tabs--though it seems the trend is Not Many--will show bar lines, but even then I understand how difficult it can be to line up the notes.
Tabs that are written without bar lines or some other indication of beat will often use the space between numbers as a general guide... The bigger the gap, the longer the note, etc...
The bad news, however, is that most tab authors assume you have a copy of the song (in my experience), or can hear the part in your head--and only need assistance with fretboard fingering to find the notes.
The timing is seldom clearly indicated in many tabs.
Waiting to be reimbursed for paying my dues.
Electra/Westone Club #47 | Ibanez Club #1176
Fender RW '50s Precision w/Jazz Neck, Engelhardt ES-9, Ben Lindsey '62 Precision