ResizeFly
Dynamically resize your WordPress images on the fly. Upload them once and don't worry about missing or new image sizes.
Consider an alternative
ResizeFly shows warning signs in 2026 — compare the alternatives below before installing. It runs on 10+ sites, is rated 5/5 and was last updated 6 years ago, and scores 35/100 on our health check.
- Small user base (10+ active installs)
- No update in 5 years
- Only tested up to WordPress 5.6 (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 ResizeFly stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| Dynamic | >100 |
| dynamic images | >100 |
| image | >100 |
| jpg | >100 |
| png | >100 |
Version adoption
Share of active sites per release.
Rating breakdown
★★★★★★★★★★ 5 from 5 reviews
About ResizeFly
From the official readme · v3.2.6Description
Instead of creating image sizes on upload, this plugin only creates them when requested.
Normally after activating a new theme or plugin that adds new image sizes, you will have to use a tool like Regenerate Thumbnails to create the newly registered image sizes. Depending on the size of the media library and the “power” of your server, this might take a while or even take several tries to process all your images; and in the end, you don’t even know if you’ll need all of the resized images.
This plugin takes care of the resizing dynamically and creates the requested size the moment it is first requested—and only when it is requested.
Support
For users: Please use the support forums on wordpress.org
For developers: Head over to the Github repository
For everything else, find me on twitter or on slack
Installation
- Upload the plugin to your plugins directory (usually
wp-content/plugins) - Make sure you have Pretty Permalinks enabled
- Activate the plugin
The plugin handles the images from here on. The resized images are saved in a subfolder inside your uploads directory.
Prerequisites
You’ll need at least PHP 5.5, WordPress 4.7 and either GD or Imagick on your server.
Uninstalling
If you want to uninstall the plugin for good, make sure to regenerate your image thumbnails/sizes afterward using Regenerate Thumbnails or similar.
Frequently asked questions
Why does this not work when using NGINX?
Often your NGINX is configured in a way to serve the image as a static resource and in case of failure throw a 404 Not Found error. To work around this, make sure the request is sent to WordPress when the image cannot be found. Add a directive like: location ~* (/[^/]+/)?uploads/(.+\.(png|gif|jpe?g)) { try_files $uri $uri/ /index.php?q=$uri&$args; expires max; log_not_found off; access_log off; } If you have one long location directive listing all the static file formats (css, js, zip, etc.), you can also just drop the try_files $uri $uri/ /index.php?q=$uri&$args; in there.
Why is there a `resizefly-duplicate` directory in my uploads folder?
The plugin stores an optimized duplicate of each image in this folder. The reason for this is, that image resizing puts a strain on your server and uses comparably a lot of resources. To minimize this ResizeFly creates an optimized copy from which the smaller image sizes will be created.
Changelog
3.2.6
- fix issue with trying to add number to string
- revert methods to get image id to prevent db strain
see https://github.com/alpipego/resizefly/releases for full changelog
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.
Best ResizeFly alternatives
All Dynamic plugins →
FAQ
ResizeFly: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Sep 28, 2026
Is ResizeFly free?
Yes. ResizeFly is free to download and use from the official WordPress.org plugin directory.
Is ResizeFly safe to use in 2026?
ResizeFly shows warning signs in 2026 — compare the alternatives below before installing. It runs on 10+ sites, is rated 5/5 and was last updated 6 years ago, and scores 35/100 on our health check.
How many websites use ResizeFly?
ResizeFly is active on 10+ WordPress websites and has been downloaded 9,577 times since it launched in May 2016. It was downloaded 73 times in the last 30 days.
Does ResizeFly work with WordPress 7.1?
ResizeFly is officially tested up to WordPress 5.6.21, while the latest release is 7.1.2. It may still work, but try it on a staging site first.
What PHP version does ResizeFly need?
ResizeFly requires PHP 5.6 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was ResizeFly last updated?
The latest version, 3.2.6, was released on December 17, 2020 (6 years ago).
Who makes ResizeFly?
ResizeFly is developed and maintained by alpipego.
What are the best alternatives to ResizeFly?
The most popular alternatives to ResizeFly are Dynamic Conditions (60K+ installs), Login or Logout Menu Item (20K+ installs) and Dynamic Widgets (10K+ installs).
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