ImgSmaller connects your site to the ImgSmaller API and optimizes Media Library images in small background batches. Original-format output is the default, so existing media URLs remain unchanged. WebP, AVIF, JPEG, and PNG conversion are also available when the server’s WordPress image editor supports the selected format.
Key features:
- Background compression through WP-Cron, with an optional authenticated external-cron URL.
- Original, WebP, AVIF, JPEG, and PNG output options.
- Automatic original-image backups, bulk or selected restore, and cancellation-safe restore jobs.
- Backup export/import and optimized-replacement ZIP import with archive safety checks.
- Searchable exclusions and failed-image browsers.
- Current-plan usage, billing-cycle quota, allowed-domain management, and automatic retry after API throttling.
- Short-lived signed media proxy URLs when ImgSmaller cannot fetch a public attachment URL directly.
- Activity logs and live compression/restore progress.
Backups are kept in a randomized directory below WordPress uploads and protected with server configuration files where supported. Backup archives include a site identity manifest and can only be imported back into the same WordPress installation. Archives made before version 1.1.0 do not contain this manifest and cannot be imported by version 1.1.0.
External services
This plugin connects to the ImgSmaller service at https://imgsmaller.com to compress images and obtain account information.
When compression is running, the plugin sends your API key, compression settings, and either an attachment’s public URL or a short-lived signed proxy URL. ImgSmaller fetches the image, processes it, and returns status and download information. The plugin then downloads the optimized image.
When the dashboard loads account information or you manage allowed domains, the plugin sends authenticated requests for plan usage, available plans, service information, and the allowed-domain list. Saving domains replaces that list with the submitted hostnames.
Terms of Service: https://imgsmaller.com/terms
Privacy Policy: https://imgsmaller.com/privacy
Do not enter an API key or start compression if you do not want this data sent to ImgSmaller.
Screenshots
Dashboard with plan, usage, settings, and compression actions.
Compression progress, metrics, and activity log.
Searchable exclusion and failed-image browsers.
Backup export/import and bulk or selected restore tools.