Snyders was able to key off South Africa's Giulio Zorzi who made a storming start in the outside lane, with the Kiwi storming home before he ran out of real estate.
"My timing was a little off at the finish but it was hard. When you are going that fast and it is only a 50, you don't have much time to judge unless you are bang on. For me I was just a fraction behind the tempo and it was a bit of a slide into the wall. It's hard to say but another stroke may have been more detrimental.
"I came there to have fun and for me I was trying to treat it like it was just another race."
Snyders is back in the pool tomorrow in the heats of the 200m breaststroke and will also feature as a key member of New Zealand's medley relay on the final day.
Earlier Wellington debutante Samantha Lee came within a whisker of the semifinals in the women's 200m butterfly.
Lee clocked a personal best 2:11.95, only 03.s outside the long-standing national record, to be the 17th fastest qualifier. She missed out on a place in the semifinals by just half a second.
North Shore's Mitchell Donaldson clocked 2:03.89 in the 200m individual medley in his first world championship and did not advance.
Also in action tomorrow is Samantha Lucie-Smith in the 100m freestyle and Gareth Kean in the 200m backstroke.
Day 4 results:
Final men 50m breaststroke: Cameron van der Burgh (RSA) 26.77, 1; Christian Sprenger (AUS) 26.78, 2; Giulio Zorzi (RSA) 27.04, 3. Also: Glenn Snyders (NZL) 27.21, 6.
Heats:
Women 200m butterfly: Mireia Belmonte Garcia (ESP) 2:07.21, 1; Katinka Hosszu (HUN) 2:07.51, 2; Natsumi Hoshi (JPN) 2:07.59, 3. Also: Samantha Lee (NZL) 2:11.95, 17.
Men 200m individual medley: Laszlo Cseh (HUN) 1:57.70, 1; Kosuke Hagino (JPN) 1:57.73, 2; Shun Wang (CHN) 1:57.83, 3. Also: Mitchell Donaldson (NZL) 2:03.89, 40.