Image Compressor
Drop an image, compress it, grab it. Nothing gets uploaded …?your privacy stays yours.
How to Compress Images
Drop or select
Drag your image to the drop zone or click to browse. JPG and PNG only, no sign-up needed.
Adjust quality
Slide the quality bar from \x22Small\x22 to \x22Large\x22. The preview updates in real time, and the estimated size shows below.
Download it
Hit the download button. The compressed image is ready to use. Your original file never leaves your browser.
How It Works
Image compression is basically putting your images on a diet. The idea is simple: remove details your eyes can barely notice. For example, if two adjacent pixels have colors so close that the human eye can't tell them apart, they get merged into one. JPEG uses "lossy compression" — it discards some image data to reduce file size. PNG uses "lossless compression" — like packing a suitcase efficiently, no data lost but less compression. This tool uses the browser's Canvas API, so images never leave your computer.
Tips & Tricks
- • Photos compress best as JPEG — best quality-to-size ratio
- • Screenshots and icons work better as PNG — sharp edges stay sharp
- • Crop out unnecessary parts before compressing for much better results
FAQ
Will the image look blurry after compression?
Moderate compression won't make it noticeably blurry. If you drop quality below 30%, you'll see degradation. Stick to 60-80% for the best balance of size and quality.
What formats are supported?
JPEG, PNG, and WebP are supported. GIF works too, but animated GIF compression is limited since the format itself isn't very efficient.
Does compression change the image dimensions?
No, compression only affects file size (KB/MB), not pixel dimensions. If you want to resize too, use an image editor first.
Real-World Example
Jie runs an e-commerce shop and uploads dozens of product photos daily. Each image was 3MB, making the site painfully slow. Now he compresses each one to about 200KB with barely visible quality loss. Page load time dropped from 5 seconds to 1 second, and his conversion rate went up.