Photo Size Reducer

Compress Image to 300KB

When a big photo will not attach or a listing will not load, compress image to 300KB and it usually sorts it out.

Drop a photo here or tap to choose

JPG, PNG or WebP. Stays on your device.

Imagine you are selling a second hand phone online. You take six clear photos, open the listing page, and start uploading. The first two go through. The third stalls, and the fourth shows an error about file size. On a slow mobile connection, each photo of several megabytes takes ages, and the site quietly gives up.

Or imagine you are emailing an ID card scan to an office. Your mail app warns that the attachment is too large, and your recipient has a strict mailbox that will bounce anything heavy.

Both problems have a similar fix. Bring each picture down to something like 300 KB, which is small enough to send fast and still looks good on a phone or laptop screen.

Why 300 KB works so often

For normal viewing, a photo does not need to be thousands of pixels wide. A screen shows only a fraction of that. When you compress image to 300KB, you are mostly removing detail nobody could see anyway. Faces, products and everyday scenes stay clear. Very fine patterns, such as small print or thin lines, may look softer than the original.

How to do it

Drop the photo into the tool above, leave the target at 300 KB and press Compress. The tool tries many JPG quality levels and picks the best one that fits. If the picture is too large for that, it reduces its width and height in small steps and tries again. The result appears next to a preview.

Do the same for each picture. On this page you work with one image at a time.

An image compressor online is only useful if it stays out of your way. If you need to reduce image size for email, or reduce photo size to 300KB for a listing, a 300KB image is a sensible target.

Tips for listings

  • Take photos in daylight. Bright, even light gives the compressor clean areas to work with.
  • Avoid clutter in the background. A tidy background gives a smaller file at a given quality.
  • Keep the first photo the best one. It is the one buyers see first.

Tips for email

  • Compress before you attach, not after. Some mail apps recompress in their own way and can make things worse.
  • If you send several pictures, keep each one modest so the total stays under the mailbox limit.

Other sizes

If your service wants less, see 200 KB. If it allows more, 500 KB keeps extra detail. The picture stays on your device the whole time, and nothing is uploaded here.