Performance fix guide
No Response Compression
Server is not using gzip or Brotli. Enabling compression reduces transfer size 60-80%.
Issue ID: PERF-COMPRESS-001
Severity: low
Impact: Med
Effort: S
Use this article when
- You need deeper remediation guidance than the issue card can show.
- You want CMS-specific steps before handing the fix to a developer.
- You want a repeatable re-check path after shipping the change.
What this issue is
Server is not using gzip or Brotli. Enabling compression reduces transfer size 60-80%.
Why it matters
Server is not using gzip or Brotli. Enabling compression reduces transfer size 60-80%. This affects load speed, Core Web Vitals, and how many visitors stay long enough to convert.
How we detect it
- FreeSiteAudit flags this issue when the rule for PERF-COMPRESS-001 fails and the page evidence points to Http headers.
- You can usually confirm this by checking the page source or the relevant page settings inside your CMS.
Evidence examples
Check the affected page source, rendered output, or relevant CMS setting to confirm the missing or incorrect element.
How to fix it
- 1Enable gzip or Brotli compression on your web server
- 2For Apache: enable mod_deflate
- 3For Nginx: add gzip on; to your config
- 4Most CDNs and hosting providers support compression out of the box
How to re-check it
- Check response headers for Content-Encoding: gzip or br
Related tools
This issue is best verified with the full FreeSiteAudit crawl rather than a single-point mini tool.