37 Audits

Time To First Byte Checker

Performance Checker

Measures website response time performance

Performance
10 credits
Per check
~30 seconds
Average runtime
Active
Status

How it works

This checker measures the Time To First Byte (TTFB) performance metric to evaluate website response speed and server performance. The checker sends HTTP request to the website, measures time from request to first byte received, and categorizes performance based on response time thresholds. It follows the recomendation of https://web.dev/articles/optimize-ttfb

What this checker validates

This checker measures the Time To First Byte (TTFB) performance metric to evaluate website response speed and server performance. It sends HTTP request to the website, measures time from request to first byte received, and categorizes performance based on response time thresholds.

Output Documentation

StatusConditionTest Logic
SUCCESSTTFB is fastResponse time ≤ 600ms
WARNINGTTFB is moderateResponse time > 600ms and ≤ 1000ms
FAILTTFB is slowResponse time > 1000ms

Risks and Considerations

Poor User Experience: Slow response times lead to user frustration and increased bounce rates. SEO Penalties: Google considers page speed as a ranking factor, so slow sites may rank lower. Lost Revenue: Slow sites typically have lower conversion rates and reduced user engagement.

Ready to start auditing?

Add this checker to your monitoring setup and start identifying issues on your websites today.

© 2025 37 Audits. All rights reserved. Audit your websites with confidence.

Supported by

Featured on Dofollow.Tools

Made with ❤️ in Floripa