Since May 18, 2019, the uptime of howl.io has been tested 7 times over the past 2 348 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 October 21, 2025, assessments revealed that howl.io was experiencing no downtime. As of October 21, 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.