Since May 18, 2019, the uptime of howl.io has been tested 7 times over the past 2 313 days. With the last time on March 1, 2025, when a code 200 was returned, howl.io was up 7 times out of all the checks conducted. As of September 17, 2025, assessments revealed that howl.io was experiencing no downtime. As of September 17, 2025, no responses have been recorded with an error status based on all replies that have been received. Howl.io replied in 0.129 seconds on March 1, 2025, differing from its 0.100 seconds average response time.