Image Compressor
Compress JPEG, PNG, and WEBP images in your browser without any upload.
🖼️
Drop images here or
JPEG, PNG, WEBP supported. Files never leave your browser.
Image Compressor is a fast, browser-based tool that reduces the file size of JPEG, PNG, and WEBP images without sending them to a server. It is useful for web developers, content creators, and anyone who needs smaller image files for faster page loads, email attachments, or storage-conscious workflows. All processing happens locally in your browser, so your images stay completely private.
Tool interface
The interface is clean and focused:
- A drag-and-drop upload area for one or multiple images
- A quality slider to control compression level (1–100%)
- A file list showing each image name and original size
- Live size comparison after compression (original → compressed, savings %)
- A
Compress & Downloadbutton to process and save all files - A
Clearoption to reset and start over
For multiple files, the output is packaged into a single ZIP archive.
Tool description
Image Compressor uses your browser's built-in rendering to reduce image file sizes. You control the quality level, which determines how aggressively the image is compressed. Lower quality means smaller files; higher quality preserves more detail at a larger size.
For JPEG and WEBP files, compression is handled via the Canvas API with the quality value you set. For PNG files, the tool uses lossy color quantization to reduce the palette and shrink file size significantly, similar to how tools like pngquant work. The output format always matches the input format.
If the compressed result is larger than the original, the tool automatically returns the original file unchanged and displays an "already optimized" notice.
Some practical use cases:
- Reducing image sizes before uploading to a CMS or blog
- Preparing images for email attachments with size limits
- Compressing product photos for e-commerce pages
- Shrinking screenshots and graphics for documentation
- Batch-processing multiple images at once for a project
How to use
- Drop your images onto the upload area or click
Browseto select files. - Adjust the quality slider to your preferred level (80% is a good starting point).
- Click
Compress & Downloadto process the files. - Review the size comparison shown next to each file name.
- Single files download directly; multiple files are saved as a ZIP archive.
Tip: For most images, a quality setting between 70–85% offers a good balance of visual quality and file size reduction.
FAQ
Which image formats are supported?
JPEG, PNG, and WEBP files are accepted. The output format always matches the input.
Does quality affect PNG output?
Yes. PNG compression uses color quantization, so lowering the quality reduces the number of colors in the image, which decreases file size. Higher quality preserves more colors and detail.
Can I compress multiple images at once?
Yes. You can drop or select multiple files. All compressed images will be downloaded together as a ZIP archive.
Are my images uploaded to a server?
No. All compression happens in your browser. Your files are never sent anywhere.
Why does it say "already optimized"?
Some files are already well-compressed. When the result would be larger than the original, the tool returns the original file unchanged and shows this notice.