Image Compressor
Before & After Comparison
Free Online Image Compressor & Photo Size Reducer
Compress images online instantly with imgBig.com's free image compressor. Reduce image file size for web, email, and social media without losing visible quality. Adjust the compression level with a quality slider to find the perfect balance between file size and image clarity. Whether you need to compress a JPEG for faster website loading, reduce PNG file size for email attachments, or shrink WebP images for mobile optimization, our tool delivers. No uploads to external servers — all compression happens locally in your browser for maximum speed and privacy. Ideal for web developers, bloggers, photographers, and anyone who needs smaller image files.
How to Compress an Image Online
- Upload your image by clicking, dragging, or pasting a URL
- Adjust the quality slider — lower values create smaller files, higher values preserve more detail
- Preview the before and after comparison to check quality
- Click "Compress" to process your image
- Download the compressed image with reduced file size
Frequently Asked Questions
How much can I reduce image file size?
Depending on the original image and quality setting, you can typically reduce file size by 50-80% while maintaining good visual quality. JPEG images compress more than PNG files.
What quality setting should I use?
For web use, 70-80% quality provides an excellent balance. For email sharing, 60-70% works well. For print or archival purposes, use 90% or higher.
Does compressing an image reduce its dimensions?
No. Our compressor reduces file size (KB/MB) while keeping the original pixel dimensions unchanged. To change dimensions, use our Image Resizer tool.
Is my image safe and private?
Absolutely. All compression happens in your browser. Your images are never uploaded to any server, ensuring complete privacy and security.
Why Use Our Image Compressor?
- Compress images online for free — no signup or software needed
- Reduce image file size by up to 80% without visible quality loss
- Adjustable quality control for perfect size-to-quality balance
- Works with JPG, PNG, WebP, and all common image formats
- Fast, secure, and privacy-friendly — no server uploads
- Perfect for website optimization, email, and social media