Online Image Compressor
This online image optimizer uses a smart combination of the best optimization and lossy compression algorithms to shrink JPEG, GIF and PNG images to the minimum possible size while keeping the required level of quality.
Upload up to 20 images. Wait for the compression to finish. Click thumbnails in the queue for quality setting. Use the slider to control the compression level and mouse/gestures to compare images.
Drop Your Files Here
Drag and drop up to 20 images or click to browse files.
Supports JPEG, PNG, and GIF formats up to 10MB each.
Why Choose Our Image Compressor?
100% Private & Secure
All image processing happens directly in your browser. Your files never leave your device, ensuring complete privacy and security.
Lightning Fast
Advanced compression algorithms optimized for speed. Process multiple images simultaneously with real-time preview.
Quality Control
Fine-tune compression levels with our intuitive slider. Compare original vs compressed with side-by-side preview.
Batch Processing
Upload up to 20 images at once. Download individual files or get everything in a convenient ZIP archive.
Completely Free
No registration, no watermarks, no hidden fees. Use our tool unlimited times without any restrictions.
Mobile Friendly
Works perfectly on all devices - desktop, tablet, and mobile. Responsive design for optimal user experience.
How Image Compression Works
In terms of digital files, compression is the act of encoding information using fewer bits than what's found in the original file. Simply put, it means converting a large file into a smaller file.
There are two types of compression: lossless and lossy. Lossless compression is when the compression tool removes empty, needless, or duplicated bits from the original file. This results in a smaller file that has the exact same quality as the original. Lossy compression is when the compressor removes excessive or unimportant bits from the original file. This results in a smaller file but with a reduced quality. With lossy compression, how small you want the final file to be will depend on how much loss of quality you're comfortable with.
Why would you want to compress images?
Depending on the source of an image, the file could be quite large. A JPG from a professional DSLR camera, for example, could be dozens of megabytes. Depending on your needs, this could be too big. Compressing this image would be very useful.
Likewise, you might have large images on your phone. These images could be taking up a lot of hard drive space and preventing you from taking more photos. Compressing them could free up more internal storage, fixing this problem.
How does the image compressor work?
Our tool uses lossy compression to shrink down image files. It supports three file types: PNG, JPG/JPEG, and GIF. This system intelligently analyzes uploaded images and reduces them to the smallest possible file size without negatively affecting the overall quality.
To begin, you'll need to upload some images you'd like to compress. You can upload up to 20 images at once and you can feel free to mix and match file types. In other words, you don't need to only upload JPGs and wait to upload PNGs. Our server can automatically parse out the files for you.
First, hit the "Upload Files" button and navigate to your images. Once uploaded, you'll see thumbnails for all your images arriving in the queue. You'll be able to see their real-time progress as our server analyzes them.
As stated, our server will determine the ideal compression rate to reduce the file size while not reducing quality too much. However, if you want more or less compression, you can control it. Tap the thumbnail of the image you'd like to tweak. Now, move the quality slider up or down until you settle on a file size/quality setting you think is just right. When you're finished, hit the "APPLY" button and move on to repeat these steps with the next image.
When you are satisfied with the current batch, hit the "DOWNLOAD ALL" button. This will download a ZIP file with all your compressed images. If you don't need all of them, you can hit the "DOWNLOAD" button under each thumbnail instead to grab each one individually.
Ready for another batch? Hit the "CLEAR QUEUE" button and start again. You can use this tool as many times as needed without cost.
Image Optimization Best Practices
Choose the Right Format
- JPEG: Best for photographs and images with many colors
- PNG: Ideal for images with transparency, text, or few colors
- GIF: Suitable for simple animations and images with very few colors
Quality Settings Guide
- 90-95%: High quality for important images (hero images, product photos)
- 80-85%: Good balance for most web content
- 70-80%: Acceptable for thumbnails and social media
- 60-70%: Minimum acceptable quality for most uses
When to Compress Images
- Before uploading to your website or blog
- When sending images via email
- For social media posts and profiles
- To save storage space on your device
- When images load slowly on your site
Frequently Asked Questions
Is it safe to compress images?
There is no need to be worried about the safety of our free service. Your original files will stay untouched on your system, so if you are unhappy with your compressed files, you can simply try again. Also, our unmanned system purges all data after one hour, so you don't need to worry about the security of your data.
What file formats are supported?
We support JPEG, JPG, PNG, and GIF image formats. These are the most common formats used on the web and cover most use cases for image compression.
Is there a file size limit?
Yes, individual files are limited to 10MB for optimal performance. You can upload up to 20 files at once, giving you plenty of capacity for batch processing.
How much can I reduce file sizes?
Compression results vary by image type and content, but typical reductions range from 50-80%. Photos with lots of detail may compress to 60-70% smaller, while simple graphics can achieve 80%+ reduction.
Do compressed images lose quality?
Our smart algorithms minimize quality loss while maximizing file size reduction. You can adjust quality settings and use our comparison slider to ensure results meet your standards before downloading.
Are my images stored on your servers?
No, all image processing happens locally in your browser using JavaScript. Your images never leave your device, ensuring complete privacy and security.
Can I use this tool for commercial purposes?
Yes, our tool is free for both personal and commercial use. There are no restrictions on how you use the compressed images.
What browsers are supported?
Our tool works in all modern browsers including Chrome, Firefox, Safari, and Edge. JavaScript must be enabled for the compression to work.
Technical Information
How Our Compression Works
Our image compression tool uses advanced algorithms implemented in JavaScript that run directly in your browser. This client-side approach ensures your images never leave your device while still providing powerful compression capabilities.
Supported Image Formats
JPEG/JPG
Perfect for photographs with millions of colors. Lossy compression that can achieve significant size reductions.
PNG
Best for images with transparency, text, or few colors. Supports both lossless and lossy compression.
GIF
Ideal for simple graphics and animations with limited colors. Lossless compression with palette optimization.
Privacy & Security
Your privacy is our top priority. All image processing happens locally in your browser using HTML5 Canvas and JavaScript APIs. No images are uploaded to our servers, and no personal data is collected or stored.
Browser Requirements
- Modern browser with HTML5 Canvas support
- JavaScript enabled
- Minimum 100MB available RAM for large images
- File API support for drag and drop functionality
Ready to Optimize Your Images?
Start compressing your images now and experience the difference optimized images can make for your website performance and storage savings.