Head-to-head · October 2026
CSS JS Manager, Async Jav… vs Speed Up
CSS JS Manager, Async JavaS… comes out ahead, winning 6 of 8 head-to-head checks against Speed Up.
Speed Up – Optimize CSS Delivery
This plugin is no longer recommended. Deferring every stylesheet makes the page paint before its own layout…
| Metric | CSS JS Manager, Async Jav… | Speed Up |
|---|---|---|
| Active installs | 1K+ | 500+ |
| Downloads (30 days) | 744 | 237 |
| Download trend | -52.5% | +10.2% |
| Rating | 4.8/5 | 5/5 |
| Reviews | 90 | 8 |
| Health score | 82/100 | 73/100 |
| Last updated | 2 months ago | 3 months ago |
| Tested up to | WP 7.1.3 | WP 7.0.7 |
| Support resolved | — | — |
| Requires PHP | Any | 7.0+ |
| First released | Jan 2019 | Dec 2016 |
Daily downloads, last 90 days
CSS JS Manager, Async J…Speed Up
Choose CSS JS Manager, Async Jav… if…
You care most about active installs, downloads (30 days) and reviews.
- Loved by users — 4.8/5 from 90 reviews
- Tested with the latest WordPress (7.1)
Choose Speed Up if…
You care most about download trend and rating.
- Small user base (500+ active installs)
FAQ
CSS JS Manager, Async Jav… vs Speed Up: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 17, 2026
Which is better, CSS JS Manager, Async JavaS… or Speed Up?
CSS JS Manager, Async JavaS… comes out ahead, winning 6 of 8 head-to-head checks against Speed Up. Choose CSS JS Manager, Async JavaS… if you care most about active installs, downloads (30 days) and reviews. Choose Speed Up if you care most about download trend and rating.
Is CSS JS Manager, Async JavaS… more popular than Speed Up?
CSS JS Manager, Async JavaS… is the more popular of the two with 1K+ active installs, compared with 500+ for Speed Up.
Can I use CSS JS Manager, Async JavaS… and Speed Up together?
Both plugins cover async css and defer css, 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 CSS JS Manager, Async JavaS… and Speed Up 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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