Image Compressor — Reduce Image Size Online
Large photos slow down websites, fill up inboxes, and eat through mobile data. This free image compressor shrinks your JPG, PNG and WebP pictures right in your browser, so you can keep the quality you need and drop the file size you do not. Pick a quality level, set a maximum width, and choose your output format, then download the smaller file. Everything happens on your device: your pictures are never uploaded to a server, never stored, and never seen by anyone else. There is no account, no watermark and no limit on how many images you compress.
JPG, PNG and WebP files. Each image is compressed separately.
No images selected yet.
Privacy: your images never leave your browser. Compression runs entirely on your device.
How to Use
- Add your images. Click the drop zone and choose one or more JPG, PNG or WebP files, or drag them in. Each file is listed with its original size.
- Set the quality. The slider defaults to 80 percent, a good balance for photos. Drag it lower for a much smaller file, or higher, toward 95 percent, when quality matters most.
- Set the max width and format. Images wider than your max width, 1920 pixels by default, are resized down. Choose JPEG for the smallest photo files, WebP for a modern small file, or PNG when you need sharp graphics.
- Click Compress Images and download. Each result shows the before and after size and the percentage saved. Click Download compressed image under each one to save it.
Worked Example
Suppose you took a photo on your phone that is 4.2 MB and 4032 pixels wide, and you need to attach it to an email. Add the photo, leave the quality at 80 percent and the max width at 1920 pixels, choose JPEG, and click Compress Images. The expected result is a compressed image around 0.9 to 1.5 MB, roughly 60 to 70 percent smaller than the original, at 1920 pixels wide. On a phone or laptop screen it looks almost identical to the original, but it uploads and sends far faster. A photo recompressed at quality 0.8 JPEG is smaller than the original in almost every case, and typical savings for phone photos are often 40 to 70 percent. If the result is still too large, lower the quality to 70 percent or the max width to 1280 pixels and compress again.
Why Do Images Shrink So Much?
Phone cameras save very large, very detailed pictures, far larger than any screen needs. A 12-megapixel photo is about 4000 pixels wide, while most websites show images at 800 to 1600 pixels wide, so half the detail is never seen. Resizing to a sensible max width removes that wasted detail first. Then JPEG and WebP compression remove fine detail the human eye barely notices, especially in smooth areas such as skies and walls. That combination is why savings of 40 to 70 percent are normal for phone photos at 80 percent quality.
Honest Limits
Compression cannot work miracles. A small image that is already heavily compressed may shrink by only a few percent, or in rare cases a PNG output may even be larger than the original JPEG, because PNG stores every pixel without loss. If that happens, switch the format back to JPEG or WebP. Very low quality settings, below about 50 percent, will show visible blockiness and colour banding, especially in faces and skies, so use them only for thumbnails or drafts. Transparent PNG images lose their transparency when converted to JPEG, because JPEG has no transparency; choose PNG or WebP output to keep it.
Frequently Asked Questions
How much smaller will my images get?
A typical phone photo recompressed at 80 percent quality as a JPEG ends up 40 to 70 percent smaller than the original. The exact saving depends on the photo, the quality setting and whether it is resized. Already-compressed images shrink less.
Are my images uploaded anywhere?
No. Your images never leave your browser. Compression runs entirely on your device, so your photos are never uploaded, stored or seen by anyone else.
What is the best quality setting?
80 percent is a good default for photos: it usually cuts the size by more than half with no visible difference. Use 90 to 95 percent for important prints, and 60 to 70 percent when the smallest possible file matters more than perfect quality.
Should I choose JPEG, WebP or PNG?
Choose JPEG for the smallest photo files that work everywhere. Choose WebP for even smaller files in modern browsers. Choose PNG for screenshots, logos and diagrams, or when you need transparency, but expect larger files.
Will compression make my photo look worse?
At 80 percent quality, almost never on a screen. At very low quality, below about 50 percent, you may see blockiness in smooth areas. If quality matters, keep the original and compare the compressed copy before you delete anything.