How to compress images
- Press Add images or drop photos on the box. Add one or a few hundred: they're compressed one after another.
- Choose how to save them. Same format suits most photos. WebP usually gives the smallest files, if the place you're uploading to accepts it.
- Pick Quality (80 is a good start), or Target file size when a form says something like "max 1 MB".
- If the images only need to look good on a screen, turn on Limit width and height. 1920 pixels is plenty for web pages, email and chat.
- Press Compress and check the sizes before and after. Compare shows the original and the new file side by side. Download them one by one or all together as a ZIP.
JPEG, WebP or PNG: which to use
| Format | Best for | Transparency | Good to know |
|---|---|---|---|
| JPEG | Photos you need to upload or send anywhere | No (filled with white) | Opens on every device, app and upload form. |
| WebP | Photos and graphics for websites and blogs | Yes | Usually the smallest. Some older software and upload forms still don't accept it. |
| PNG | Screenshots, logos, diagrams, anything with text | Yes | Lossless, so edges stay crisp, but a photo saved as PNG is usually several times bigger. |
Google's study of the format found lossy WebP files 25 to 34% smaller than JPEGs of the same measured quality. If you're not sure what a site or an application form accepts, choose JPEG: it works everywhere.
What the quality number means
The quality number isn't a percentage of anything. It tells the encoder how much fine detail it may throw away, and lower numbers throw away more, mostly where the eye is least likely to notice. Every app uses its own scale, so 80 here isn't the same as 80 in Photoshop or on your phone.
For photos, 75 to 85 usually looks the same as the original at normal viewing size while cutting the file to half or less. Above 90, files grow fast for detail you'd only see when zooming in. Below about 60, smooth areas like skies and skin start to show blocks and bands. A JPEG also loses a little each time it's saved, so compress from the original rather than from a copy that has already been compressed.
Why resizing saves more than quality
File size follows the number of pixels. A 12-megapixel phone photo (4032 × 3024) has about 12.2 million pixels. At 1920 × 1440 it has 2.8 million, 77% fewer, and the file shrinks by roughly as much before the quality setting even comes into it.
Screens show far fewer pixels than a phone camera records. A full HD monitor is 1920 × 1080, and a photo in a chat window or a blog post is shown smaller still. So when a picture is only going to be looked at on a screen, limit its width and height first and leave the quality around 80. Lowering the quality alone shrinks the file too, but the damage shows sooner.
Location data and other metadata
Photos from phones and cameras carry EXIF metadata: the date, the camera model and its settings, and often the GPS coordinates of where the picture was taken. This tool saves each image as a new file made from its pixels alone, so all of that is left behind, location included. It's worth doing before you post pictures taken at home or of your kids.
The orientation tag goes as well, but nothing ends up sideways: the image is turned the way your phone showed it before it's saved. There's one exception to the clean-up. When the original is kept because the new file wasn't smaller, you get the original file back untouched, metadata and all, and the list tells you so.
Frequently asked questions
- Are my images uploaded to a server?
- No. Images are opened, resized and saved again inside your browser tab, using the browser's own image encoders. Nothing is sent anywhere, and closing the tab clears everything.
- How do I get a photo under 1 MB or 200 KB?
- Choose Target file size and type the limit, or press one of the preset buttons. Each image is saved at the highest quality that fits, and if even quality 40 is too big, it is scaled down as well. 1 MB here means 1,000,000 bytes, so the file passes limits counted either way.
- Why did a file come back the same size?
- If the new file isn't smaller than the original, the tool gives you the original back instead of a bigger file. That happens with images that were already compressed hard, and often with PNGs saved again as PNG. Try WebP, a lower quality or a smaller width and height.
- Can it open iPhone HEIC photos?
- In Safari on iPhone, iPad and Mac, yes, and they are saved as JPEG. Other browsers, such as Chrome and Firefox, can't open HEIC files. To have your iPhone take JPEG photos instead, go to Settings › Camera › Formats and choose Most Compatible.
- Does compressing remove GPS location data?
- Yes. Saving the image again writes a new file without its EXIF metadata, so the location, camera details and capture date are gone. The one exception is an original that was kept because compressing didn't make it smaller: that file is unchanged.
- Is there a limit on file size or the number of images?
- There are no limits and nothing to sign up for. Images are compressed one at a time to keep memory use low. Very large images, over about 50 megapixels, can be slow and may not open on a phone, so set a maximum width and height for those.
Your photos never leave your device. Everything on this page runs locally in your browser: there's no upload, no account and nothing stored on a server.