Is Varnish Working?
Test your wordpress url to see if it contains the Varnish Cache HTTP headers using the API available at https://isvarnishworking.co.uk
Consider an alternative
Is Varnish Working? shows warning signs in 2026 — compare the alternatives below before installing. It runs on 10+ sites and was last updated 5 years ago, and scores 23/100 on our health check.
- Small user base (10+ active installs)
- Very few reviews so far
- No update in 5 years
- Only tested up to WordPress 5.7 (latest is 7.1)
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Is Varnish Working? stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| is varnish working | #58 |
| test varnish | #78 |
| varnish | >100 |
| varnish cache | >100 |
Version adoption
Share of active sites per release.
About Is Varnish Working?
From the official readme · v1.0.2Description
Test your wordpress url to see if it contains the Varnish Cache HTTP headers using the API available at https://isvarnishworking.co.uk
Frequently asked questions
How does this work?
It takes the URL of your wordpress installation and runs it through the API at https://isvarnishworking.co.uk and checks the HTTP headers for the X-Varnish, X-Cache and other varnish HTTP headers.
Changelog
1.0.2
- Added more error handling fixes
1.0.1
- Added ajax response to deal with API errors
1.0.0
- Created the plugin
For developers
Is this your plugin? Show off the numbers.
Add a live badge to your site, docs or GitHub README. It updates on its own — no account needed.
FAQ
Is Varnish Working?: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 13, 2026
Is Is Varnish Working? free?
Yes. Is Varnish Working? is free to download and use from the official WordPress.org plugin directory.
Is Is Varnish Working? safe to use in 2026?
Is Varnish Working? shows warning signs in 2026 — compare the alternatives below before installing. It runs on 10+ sites and was last updated 5 years ago, and scores 23/100 on our health check.
How many websites use Is Varnish Working??
Is Varnish Working? is active on 10+ WordPress websites and has been downloaded 1,595 times since it launched in June 2021. It was downloaded 54 times in the last 30 days.
Does Is Varnish Working? work with WordPress 7.1?
Is Varnish Working? is officially tested up to WordPress 5.7.20, while the latest release is 7.1.3. It may still work, but try it on a staging site first.
When was Is Varnish Working? last updated?
The latest version, 1.0.2, was released on June 29, 2021 (5 years ago).
Who makes Is Varnish Working??
Is Varnish Working? is developed and maintained by Oliver Whysall.
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