Compress Images Online.
Compress and optimize your JPEG, PNG, WebP. This free online tool uses advanced compression algorithms to reduce file sizes while maintaining quality. All processing happens in your browser.
Drop images here or browse files
Supports JPEG, PNG, WebP
Drop your images here
Slide right for a smaller file. Slide left to keep higher quality.
Fewer colors = smaller file. Drag to find the sweet spot.
Original
Compressed
Quality
Free Online Image Compressor Reduce Image Size Instantly
ResizeCompress offers the most straightforward free online image compressoravailable no account needed, no software to install, and no files ever leave your device. Whether you need to compress an image to 20KB, 30KB, 50KB, 100KB, 200KB, 500KB or even 1MB, our tool handles it all in seconds, directly inside your browser.
Our online image compressor works with all popular formats including JPG, PNG, and WebP. You can choose to compress by setting a specific quality level, or simply enter a target file size and let the tool find the optimal quality automatically. It's the fastest, simplestimage compressor free tool you'll find online.
Compress Image to Any KB Size 20KB, 50KB, 100KB & More
Need to hit a specific file size? Our target size mode uses a smart binary search algorithm to find the best quality setting that brings your image under your target whether that'simage compressor to 20KB for a form submission, image compressor to 50KBfor a profile photo, 100KB for an email attachment, or200KB / 500KBfor a website upload. Just enter your target KB and click compress the tool does the rest.
Compress PNG Images Without Losing Quality
PNG files are notorious for their large file sizes, especially for screenshots and graphics with transparency. Our image compressor PNG support lets you reduce PNG file sizes significantly while maintaining sharp edges and transparent backgrounds. You can also convert PNG to WebP format for even smaller output sizes without compromising visual quality.
Compress JPG & WebP Online Quality Control Built-In
For JPG and WebP images, our quality slider gives you precise control from 1% to 100%. The live preview lets you compare the compressed result against the original before downloading, so you always know exactly what you're getting. This makes our online image compressorideal for photographers, bloggers, developers, and anyone who needs optimised images for the web.
100% Private Everything Processed in Your Browser
Unlike most image compressor online tools that upload your files to a remote server, ResizeCompress compresses everything locally using your browser's HTML5 Canvas API. Your images are never sent anywhere - no server, no cloud storage, no third parties. This means faster compression, zero waiting for uploads, and complete privacy every time.
How to Compress an Image Online - Step by Step
- Click the upload area or drag and drop your image (JPG, PNG, WebP).
- Choose a compression mode: Quality (set a quality %) or Target Size (enter KB).
- Adjust the quality slider or type your target file size in KB.
- Click Compress Image and preview the before/after result instantly.
- Click Download to save the compressed image to your device.
That's it - five simple steps to a smaller, web-ready image. No registration, no watermarks, no limits. Just a clean, fast, image compressor free tool built for everyone.
Frequently Asked Questions
How do I compress an image to 50KB or 100KB?
Switch to 'Target Size' mode, enter your desired size in KB (e.g. 50 or 100), then click Compress Image. The tool automatically finds the best quality level to bring the file under your target size.
Can I compress a PNG image without losing quality?
Yes. Select PNG as your output format and set a high quality level (80-90%). PNG compression is lossless at full quality, but reducing the quality slider will progressively reduce file size. For maximum reduction, try converting to WebP format.
What is the maximum image size I can compress?
There is no file size limit - compression is handled entirely in your browser using the Canvas API. However, very large images (50MB+) may take a few extra seconds to process depending on your device.
Will compressing an image reduce its visual quality?
Compression always involves a trade-off between file size and quality. At 70-85% quality, most images look virtually identical to the original while achieving 50-80% file size reduction. Use the before/after preview to find the right balance.
What image formats are supported for compression?
ResizeCompress supports JPG/JPEG, PNG, and WebP. You can also choose to output in a different format - for example, convert a PNG to WebP for smaller file sizes.
Is this image compressor really free?
Yes - completely free, forever. No sign-up, no subscription, no watermarks, and no upload limits. All compression happens in your browser so your files stay 100% private.