Image Compressor
Shrink JPG, PNG and WebP images with a live quality slider and see exactly how much you save. Nothing is uploaded — compression happens on your device.
Click to choose images or drag & drop them here
JPG, PNG, WebP — select as many as you likeHow to compress an image
- Choose an output format — JPG or WebP give the biggest savings for photos.
- Drag the quality slider; lower quality means a smaller file.
- Optionally set a maximum width to resize oversized images (often the biggest saving).
- Drop your images, review the before-and-after sizes, and download.
Adjust the slider and re-drop the image to compare results until you are happy with the balance between size and quality.
Tips for the best results
- Resize first. A 4000px photo displayed at 800px is wasting most of its data — setting a max width usually saves more than the quality slider alone.
- Use JPG or WebP for photographs. They compress far smaller than PNG for images with lots of colour.
- Keep PNG for graphics. Logos, icons and screenshots with text stay sharp as PNG; just resize rather than converting.
- Aim for a target. Under 200 KB for large web images and under 100 KB for thumbnails is a good rule of thumb.
Frequently Asked Questions
How does image compression work?
Compression reduces file size by storing the image more efficiently. Lossy compression (used for JPG and WebP) discards fine detail the eye barely notices, which shrinks the file dramatically. This tool lets you control that trade-off with a quality slider so you can find the point where the file is small but still looks good. It can also resize very large images, which is often the biggest single saving.
Will compressing an image reduce its quality?
A little, and usually invisibly. At high quality settings the compressed image looks identical to the original on screen while being much smaller. Lower the slider and you gain more savings at the cost of visible artefacts. The live preview and file-size figures let you judge the balance for each image before you download.
What is a good file size for a website image?
As a rough guide, aim for under about 200 KB for a large hero image and under 100 KB for smaller photos and thumbnails. Smaller pages load faster, which improves both user experience and search ranking. Resizing an oversized image to the actual width it will display, then compressing, usually gets you well within these targets.
Can I compress a PNG?
Yes. PNG is lossless, so the main way to shrink it here is to resize the dimensions or convert it to a more efficient format. For photographs, converting a large PNG to JPG or WebP typically cuts the size by a huge margin; for logos and graphics with few colours, keeping PNG and resizing is usually best.
Is my image uploaded anywhere?
No. All compression happens locally in your browser using the Canvas engine, so your images never leave your device and are never stored on a server. This makes it safe for private photos, business documents and anything you would prefer not to upload.
Why compress images at all?
Smaller images load faster, use less mobile data, and are easier to email or upload where there is a size limit. For a website or online listing, lighter images improve page speed and Core Web Vitals, which helps both visitors and SEO. For everyday use, compression gets a photo under an upload cap without you having to crop or delete anything.