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<p>Convert existing categories to tags or tags to categories, selectively.</p>


Categories to Tags Converter

Th plugin is old but still work perfectly. I have tried it on a modern install I have, with PHP7.

Works fine, with PHP 7 too

Convert existing categories to tags or tags to categories, selectively.

Dhanendran Rajagopal

<p>Initial version of this plugin is a fork of https://wordpress.org/plugins/taxonomy-converter/.</p>
<p>Copy or convert terms between taxonomies.</p>
<p>Taxonomies include categories, tags and any other custom taxonomies that may be present with your active theme and plugins.</p>
<p>This plugin, allows you to copy (duplicate) or convert (move) terms from one taxonomy to another or to multiple taxonomies, while maintaining associated posts.</p>
<h4>Large sites</h4>
<p>Conversions run in batches over AJAX with a progress bar, so large term sets no longer time out. A <strong>Preview (dry run)</strong> button reports exactly what will happen — how many terms would be created, how many posts re-tagged, and how many source terms deleted — before you commit.</p>
<h4>WP-CLI</h4>
<p>For scripted or very large migrations, use the command line:</p>
<pre><code># Preview copying two categories into post_tag
wp term-tax-converter convert 12 15 --from=category --to=post_tag --dry-run

# Convert (move) all categories into a custom taxonomy
wp term-tax-converter convert --all --from=category --to=topic --mode=convert
</code></pre>
<p>Run <code>wp help term-tax-converter convert</code> for all options.</p>


Term Taxonomy Converter

Copy or convert terms from one taxonomy to another while keeping their post associations.

Categories to Tags Converter vs Term Taxonomy Converter