Upon release,
Record Mirror felt the "rocking album" was a "good quality live recording". They added: "The excitement of the group and crowd has been captured well".
New Musical Express said: "
Slade Alive! is just what it implies. If you've ever been to one of their noisy gigs, you'll know exactly what I mean." The album would later be rated No. 2 in the magazine's Top 10 albums of 1972.
Melody Maker commented: "Because it was recorded in a studio proper, before an audience, they've achieved the kind of balance and sound not often heard on a live recording." Mike Diana of
Daily Press Newport News described the album as a "real toe tapper", adding: "The boys play a frenetic kind of rock 'n' roll that features screaming lyrics, monosimple rhythms and buzzing guitars."
Robert Hilburn of the
Los Angeles Times commented on the band's "forceful, celebrative nature" and concluded: "As with any band worth its rock 'n' roll shoes,
Slade Alive sounds better the louder you play it." Rich Aregood of the
Philadelphia Daily News described the album as "eminently enjoyable", noting: "...Slade is something else again. A loud, rude, and exciting flatout rock-and-roll band that could even get Pat Nixon tapping her toe." In 1991,
Q described the album as "distinctly heavy" with a "laddish rock style". They concluded: "It's just fun and beers all the way." In 2010,
Classic Rock considered the album "superior: reputation cementing".
AllMusic commented: "Slade showed why they were one of England's best live acts with this fevered concert recording. Set alight by plenty of stomping beats, lumbering bass, fat guitars, and Noddy Holder's hoarse vocal scream,
Slade Alive! finds the lads from Wolverhampton goading on their rabid fans at every juncture." ==Track listing==