Image Compressor — Reduce Image Size Online Free
Compress JPG and PNG images without losing quality. Free, no signup required.
Image compression reduces file size while preserving visual quality — essential for faster website loading, staying within email attachment limits, and saving storage space. This tool uses a quality slider to let you control the balance between file size and visual quality. A setting of 0.8 (80%) typically achieves 40–60% file size reduction with no perceptible quality loss for most photographs. PNG files compress differently from JPEGs — PNGs use lossless compression so quality is preserved but size reduction is more limited. All compression happens locally in your browser using the browser-image-compression library — your images are never uploaded to any server.
Your files never leave your device. All processing happens 100% in your browser using JavaScript. Nothing is uploaded to any server.
How to use
- • Upload any JPG, PNG or WebP image
- • Adjust quality slider as needed
- • Click Compress and see before/after comparison
- • Download the compressed image
Frequently Asked Questions
Will compressing reduce image quality?
Slight quality reduction may occur at high compression levels. Use the quality slider to find the best balance between file size and visual quality.
Are my images uploaded to a server?
No. All compression happens locally in your browser using JavaScript. Your images never leave your device.
What image formats are supported?
JPG, PNG and WebP formats are supported for compression.
What is the maximum image size I can compress?
Since processing is done in your browser, very large images above 20MB may be slow on older devices. Most images compress instantly.
How much can I reduce the file size?
Typical reduction is 30-70% depending on the original image and quality setting chosen.