From August 26, 2021, forward over the next 1 523 days, there were 11 checks done on proofreading.org's uptime. During the course of the checks, proofreading.org was online 1 times, the last uptime occurred on August 26, 2021, and a code 200 was returned. Based on all completed evaluations as of October 28, 2025, no periods of inaccessibility were detected for proofreading.org. A recent error, coded as 403, was identified on October 27, 2025, as the most recent error out of the 10 responses with errors. The response time recorded on October 27, 2025, for proofreading.org was 0.024 seconds, contrasting its average of 0.114 seconds.