Free Online Image Compressor Free, Fast & Secure.
Quickly compress image size without quality loss. Automatically optimizes images for best compression.
Drag & Drop images here
Supported: JPG, PNG, WEBP, TIFF, HEIC, AVIF
You can also click to select files.How It Works
100% free, secure, and runs entirely in your browser. No uploads, no registration.
Upload Your Image
Click 'Select Images' or drag and drop any JPG, PNG, WebP, or TIFF file. No account required.
Set Compression Level
Choose a target file size (e.g. 100KB) or drag the quality slider. Preview updates in real time.
Download Compressed File
Click 'Compress Image' and save your optimized image instantly — no waiting, no uploads.
Why Use ImageResize.co?
100% free, secure, and runs entirely in your browser. No uploads, no registration.
Up to 90% Size Reduction
Our smart compression removes hidden metadata and optimises pixel data to shrink files dramatically.
No Visible Quality Loss
Advanced algorithms preserve sharpness and colour accuracy even at high compression ratios.
Target File Size Mode
Enter an exact KB target and the tool automatically finds the right quality setting to hit it.
All Major Formats Supported
Compress JPG, PNG, WebP, and TIFF images. Output in any format you need.
100% Browser-Based
Images never leave your device. All processing happens locally — completely private and secure.
Batch Compression
Upload multiple images at once and compress them all in seconds without repetitive steps.
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Frequently Asked Questions
Everything you need to know
Not visibly at moderate settings. Our compressor removes redundant data while preserving visual detail. You can preview before downloading.
There is no server-side limit. Files up to 50MB work well on most modern computers.
JPG, PNG, WebP, and TIFF. You can also convert the format during compression — for example, compress a PNG and save as JPG.
No. Everything is processed locally in your browser. Your files never leave your device.
Yes. Upload several images and compress them all in one session. Each file is available for individual download.