Maelezo
ImOptimizer – Optimize Images is a safe, lightweight way to serve next-gen images on WordPress by converting uploads to WebP.
Most optimization plugins either rely on external APIs or risk server crashes by processing images without checking memory limits. ImOptimizer runs fully on your server using the native PHP GD library and includes a Smart Memory Guard that estimates RAM usage before converting—helping prevent memory exhaustion.
🚀 Why ImOptimizer?
- Boost Core Web Vitals: WebP images reduce page weight and speed up loading.
- Zero API Fees: No subscriptions, no credits, no data sharing. Runs locally.
- Server Safety First: Skips risky conversions on low memory and detects conflicts (Smush/EWWW/ShortPixel, etc.).
- Set & Forget: Auto-converts JPG/JPEG/PNG at upload time.
⚡ Feature Highlights
- Smart Conversion: Converts the main image AND generated thumbnails (Media Library, WooCommerce, etc.).
- Self-Cleaning Logs: Optional logging with retention cleanup (Cron).
- MIME Sync: Updates WordPress metadata so
.webpis recognized correctly. - Privacy Focused: Your images never leave your server.
Installation
- Upload the plugin folder to
/wp-content/plugins/bp-imoptimizer-optimize-images/. - Activate the plugin through the ‘Plugins’ menu in WordPress.
- Go to Settings > ImOptimizer.
- Save your preferences. (Default: Quality 85, Logging Disabled).
FAQ
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Does this convert my existing media library?
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No. The plugin processes new uploads only.
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What image formats does this plugin convert?
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It supports JPG, JPEG, and PNG images (converted to WebP).
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Can I delete the original images after conversion?
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Yes. Enable Delete Original Image in settings.
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Will this work if I don’t have an API key?
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Yes. No APIs are used. The plugin relies on your server’s GD library.
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What happens if the uploaded file is too large?
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Images larger than 15MB are skipped for stability (and logged if logging is enabled).
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Where are the conversion logs saved?
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Logs are stored in a secure folder:
/wp-content/uploads/bp-imoptimizer-logs/
In Multisite, logs are stored per site:
/wp-content/uploads/bp-imoptimizer-logs-{blog_id}/ -
What happens if I uninstall the plugin?
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Your existing WebP images remain on disk and continue to work. The plugin settings/transients and log folders are removed on uninstall.
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Does this work on WordPress Multisite?
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Yes. Each site gets its own isolated log folder.
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Why are my images not converting?
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- Ensure GD supports WebP (
imagewebpmust exist). - Enable logging and review logs.
- Disable conflicting optimizer plugins (Smush/EWWW/ShortPixel/Imagify, etc.).
- Check memory limits (the plugin skips conversions if estimated usage is too high).
- Ensure GD supports WebP (
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Can I rename the plugin folder?
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No. Keep the folder name as:
bp-imoptimizer-optimize-images
This helps ensure updates, references, and translations remain consistent.
Reviews
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Wachangiaji & Wasanidi
“ImOptimizer – Optimize Images” is open source software. The following people have contributed to this plugin.
Contributors
Translate “ImOptimizer – Optimize Images” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.0
- Initial release.
- Smart Memory Guard to prevent memory crashes.
- Optional logging + scheduled log cleanup.
- Conflict detection for popular optimizer plugins.
- Secure log directory with access protection and traversal safety checks.