Image Compressor
Compress images directly in your browser with no server upload needed. Drag and drop or select JPG, PNG, or WebP files. Adjust quality with a slider, optionally resize, and choose the output format. See before/after file sizes with compression ratio. All processing happens client-side using the Canvas API for complete privacy.
Drop image here or click to browse
Accepts JPG, PNG, WebP
How to Use
- 1
Upload an Image
Drag and drop or click to select a JPG, PNG, or WebP image from your device.
- 2
Adjust Settings
Use the quality slider to balance file size and image quality. Optionally set maximum dimensions for resizing.
- 3
Download Compressed
Compare original and compressed file sizes, then download the optimized image.
Examples by Niche
Compress a 2MB hero image to ~200KB at 80% quality with WebP output format
Reduce a 5MB product photo to under 500KB for email campaigns
Resize and compress images to meet platform file size limits
Frequently Asked Questions
Is my image uploaded to a server?
No, all compression happens entirely in your browser using the Canvas API. Your images never leave your device.
Which formats are supported?
You can upload JPG, PNG, and WebP images. You can also convert between these formats during compression.
How does the quality slider work?
The quality slider ranges from 0.1 (maximum compression, lower quality) to 1.0 (minimal compression, highest quality). A value of 0.8 provides a good balance for most images.
Does image compression affect transparency in PNG files?
No, lossless PNG compression preserves the alpha channel (transparency) completely. If you switch to lossy compression or convert to JPEG, transparency will be lost and replaced with a solid background. Keep images in PNG or WebP format if you need to retain transparent areas.
What is image compression?
Reducing image file size by removing unnecessary data while preserving visual quality.
Lossy vs lossless compression?
Lossy removes data permanently (smaller file, quality loss). Lossless preserves all data.
What is the best compression level?
70-80% quality for web images balances file size and visual quality.
What image types compress best?
JPEG for photos, PNG for graphics with text, WebP for modern web use with best compression.
How small can an image be compressed?
Depends on content. Photos compress 50-80%. Screenshots compress 70-90%.
Does compression reduce image dimensions?
No, compression reduces file size. Resizing reduces dimensions.
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