Only One Category
Only One Category makes sure users only select one category for their post by making the selectors radio buttons, which only allow one category to be selected.
Consider an alternative
Only One Category shows warning signs in 2026 — compare the alternatives below before installing. It runs on 200+ sites, is rated 4.1/5 and was last updated 11 years ago, and scores 34/100 on our health check.
- Small user base (200+ active installs)
- No update in 10 years
- Only tested up to WordPress 4.4 (latest is 7.1)
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Only One Category stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| admin | >100 |
| categories | >100 |
| edit | >100 |
| post | >100 |
Version adoption
Share of active sites per release.
Rating breakdown
★★★★★★★★★★ 4.1 from 7 reviews
About Only One Category
From the official readme · v1.0.4Description
Only One Category makes sure users only select one category for their post by making the selectors radio buttons, which only allow one category to be selected.
Rather than spend all your time maintaining the editorial style of only putting posts into a single category, this plugin is a quick way for you to enforce that standard. It makes it impossible for a person to accidentally break your site’s layout of functionality by putting a post in multiple categories. They just can’t do it, whether by accident or intention.
Installation
Activate the plugin. Now you should only see radio buttons where you previously saw category checkboxes. That’s why you downloaded it, right?
Changelog
1.0.4 (2016.02.25)
- Quick Edit now works! Big thanks to Andrew Nimmo for the PR.
1.0.3 (2016.02.25)
- David can’t count…
1.0.2 (2016.01.26)
- Removed deprecated use of get_all_category_ids
- Bumped tested version number
1.0.1 (2015.04.21)
- VCS headaches…
1.0.0 (2015.04.21)
- Some basic cleanup of code quality.
- Making it not function for quick-edit, as it was broken and so far it’s not been worth fixing.
0.2.0 (2013.08.16)
- Made plugin file’s description shorter.
- Confirmed 3.6 compatibility.
- Made catcher a properly hooked function.
Screenshots
For developers
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FAQ
Only One Category: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 6, 2026
Is Only One Category free?
Yes. Only One Category is free to download and use from the official WordPress.org plugin directory.
Is Only One Category safe to use in 2026?
Only One Category shows warning signs in 2026 — compare the alternatives below before installing. It runs on 200+ sites, is rated 4.1/5 and was last updated 11 years ago, and scores 34/100 on our health check.
How many websites use Only One Category?
Only One Category is active on 200+ WordPress websites and has been downloaded 15,428 times since it launched in July 2013. It was downloaded 89 times in the last 30 days.
Does Only One Category work with WordPress 7.1?
Only One Category is officially tested up to WordPress 4.4.34, while the latest release is 7.1.3. It may still work, but try it on a staging site first.
When was Only One Category last updated?
The latest version, 1.0.4, was released on February 26, 2016 (11 years ago).
Who makes Only One Category?
Only One Category is developed and maintained by pressupinc.
What are the best alternatives to Only One Category?
The most popular alternatives to Only One Category are Loginizer (1M+ installs), Redux Framework (900K+ installs) and Admin Menu Editor (300K+ installs).
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