Image Optimizer
Drop your JPG, PNG, or WebP files and shrink them up to 90% — without leaving your browser.
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Drop images here or click to browse
JPG, PNG, WebP — batch upload supported
Lower = smaller file. This is the main compression control.
WebP is ~25-35% smaller than JPEG — best for shrinking PNGs.
max width/height (px)
target max (MB)
Frequently Asked Questions
- Is it safe to compress images online?
- Yes. FreeLabTools Image Optimizer runs entirely in your browser using a Web Worker. Your images are never uploaded to any server, so your files remain completely private and secure on your device.
- What image formats does the optimizer support?
- The tool supports JPG, PNG, and WebP formats. You can drop any of these formats and the compression engine will optimize them while maintaining the original format.
- How does the image compression work?
- Your image is loaded into your browser's memory and compressed using a Web Worker — a background thread that keeps the UI responsive. The compression engine is browser-image-compression, an open-source library used by thousands of production apps. Nothing is ever uploaded to a server.
- What is the best quality setting for web images?
- A quality of 70% is a great default for most web images — it typically reduces file size by 60-90% while keeping visual quality nearly indistinguishable from the original. For hero images or product photos, try 80-85%.
- Is the image optimizer free to use? Are there any limits?
- The tool is 100% free with no limits on file size, number of images, or daily usage. There is no sign-up required and no watermarks are added. Since processing happens in your browser, the only limit is your device's available memory.