100% Privacy Safe
Your images never leave your device. All compression happens locally in your browser via WebAssembly. No upload risks.
Settings
Recommended. Auto converts PNG to AVIF/WebP, reducing size by 50%-80%.
Compression Target
Strength 75%
Min Size Best Quality
Max Dimensions (W/H)
Output Format
Drag images here, or click to upload
Supports JPG, PNG, WebP, AVIF • Secure Client-side
Image Toolkit
Compress Image to 50KB
Supports Specific File Size and Batch Zip Download.
Supports JPG, PNG, WebP, AVIF. 100% Browser-based processing, absolutely secure.
Compress JPG, PNG, WebP, and AVIF images to around 50KB in your browser. Set a target size, preview results, and download optimized files.
50KB upload workflow
- The compressor opens in target size mode with 50KB selected.
- Use JPG, WebP, or AVIF output for best chance of meeting strict 50KB limits.
- Reduce max width and height if a very large photo cannot reach the target cleanly.
Specific Target Size
Precise control. Enter your desired KB size (e.g., 50KB), and the algorithm automatically adjusts quality to match.
Batch Processing
Drag and drop dozens of images at once. Once processed, download all images as a single ZIP archive.
AVIF / WebP
Export next-gen formats. AVIF reduces size by 50%-80% compared to JPG at the same quality.
Support
Frequently Asked Questions
01 How to compress to a specific size (e.g., 50KB)? +
In the settings panel, switch to "Target Size" mode, then enter your desired value (e.g., 50). The tool uses binary search to find the best quality that fits your size.
02 Is batch compression supported? Any limits? +
Fully supported. You can drag dozens of images at once. There are no artificial limits (only depends on your device memory). Use the Download ZIP button to save them all.
03 Is it free? Any watermarks? +
Image Toolkit is completely free and never adds watermarks.