Head-to-head · October 2026
Compatiblizr vs WP Fossil
WP Fossil comes out ahead, winning 5 of 7 head-to-head checks against Compatiblizr.
Compatiblizr
IE 7 and 8 don’t do CSS3 or Media queries so instead of adding the fixes to your theme you can add them via a…
WP Fossil
A handy utility plugin that provides support for media queries and emulating CSS3 pseudo-classes and…
| Metric | Compatiblizr | WP Fossil |
|---|---|---|
| Active installs | 10+ | 20+ |
| Downloads (30 days) | 33 | 47 |
| Download trend | +10% | +42.4% |
| Rating | — | 5/5 |
| Reviews | 0 | 1 |
| Health score | 23/100 | 31/100 |
| Last updated | 12 years ago | 13 years ago |
| Tested up to | WP 3.9.40 | WP 3.7.41 |
| Support resolved | — | — |
| Requires PHP | Any | Any |
| First released | Jul 2014 | Sep 2013 |
Daily downloads, last 90 days
CompatiblizrWP Fossil
Choose Compatiblizr if…
You care most about last updated and tested up to.
- Small user base (10+ active installs)
- Very few reviews so far
- No update in 12 years
- Only tested up to WordPress 3.9 (latest is 7.1)
Choose WP Fossil if…
You care most about active installs, downloads (30 days) and download trend.
- Small user base (20+ active installs)
- Very few reviews so far
- No update in 12 years
- Only tested up to WordPress 3.7 (latest is 7.1)
FAQ
Compatiblizr vs WP Fossil: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 13, 2026
Which is better, Compatiblizr or WP Fossil?
WP Fossil comes out ahead, winning 5 of 7 head-to-head checks against Compatiblizr. Choose Compatiblizr if you care most about last updated and tested up to. Choose WP Fossil if you care most about active installs, downloads (30 days) and download trend.
Is Compatiblizr more popular than WP Fossil?
WP Fossil is the more popular of the two with 20+ active installs, compared with 10+ for Compatiblizr.
Can I use Compatiblizr and WP Fossil together?
Both plugins cover CSS3 and ie8, so most sites only need one. Running two plugins that do the same job can cause conflicts and slow your site down — pick the one that fits best and remove the other.
Are Compatiblizr and WP Fossil free?
Yes. Both are free to download from the official WordPress.org plugin directory. Either may also offer paid upgrades from its developer.
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