Compress Image Online Free
Reduce image file size up to 90% without visible quality loss. Batch compress up to 20 images at once. No upload to server, no signup, no watermark.
Drop your images here, or browse
Supports JPG, PNG, WebP, GIF, BMP, AVIF — up to 20 images, 50 MB each
Frequently Asked Questions
How does image compression work?
Image compression reduces file size by removing redundant data. Lossy compression (JPG, WebP) discards details the human eye barely notices — typically achieving 60-90% size reduction. Lossless compression (PNG) preserves every pixel but offers smaller savings (10-30%).
Will compression reduce image quality?
At quality settings of 75-85%, the difference is virtually invisible to the human eye while reducing file size by 60-80%. Below 50%, compression artifacts become noticeable. We default to 80% — the sweet spot between size and quality.
How much can I compress an image?
Typical results: JPG photos compress 60-85% smaller, PNG graphics 40-70%, and converting to WebP adds an extra 25-35% savings. A 5 MB photo can easily become 500 KB without visible quality loss.
What format gives the best compression?
WebP offers the best compression-to-quality ratio for web use — 25-35% smaller than JPG at the same visual quality. For photos, use WebP or JPG. For graphics with transparency, use WebP or PNG. AVIF is even better but has less browser support.
Is it safe to compress images online?
With Smolpix, absolutely. Your images are processed entirely in your browser using the Canvas API. No files are ever uploaded to our servers — your data stays on your device. This is the most private way to compress images online.
Can I compress images to a specific file size?
Yes. Adjust the quality slider to reach your target size. Lower quality = smaller file size. For precise control: start at 80% quality, check the result size, and adjust up or down. WebP format consistently produces the smallest files.
Can I compress multiple images at once?
Yes. Smolpix supports batch compression — drop up to 20 images at once. Each image is compressed individually with the same quality settings, and you can download them one by one.
Compress 10,000+ images in one click
Smolpix connects to your Webflow CMS and bulk-optimizes every image — auto-convert to WebP/AVIF, compress, and resize. Set it once, forget it.