Image Compressor

How to compress an image

1. Click the upload box above, or drag your JPG, PNG or WebP image onto it. Its current size appears straight away.
2. Choose a format and, if you like, a smaller max width. Then move the quality slider. 75% is a good starting point.
3. Watch the new file size update as you change the settings, and click the download button when you are happy.

Your image is processed inside your browser, so it is never uploaded anywhere. It works on a phone, a tablet, or a computer.

Getting the best result

Compression works by throwing away detail that the eye barely notices. The lower the quality setting, the smaller the file, and at some point the loss starts to show as blur or blocky patches around edges. For most photos, a quality between 70 and 80 percent gives a big drop in size with almost no visible difference.

The biggest savings often come from the size of the picture, not the quality. A phone photo can be 4000 pixels wide, while a website rarely shows it wider than 1200. Setting a max width of 1600 or 1200 pixels can cut the file to a fraction of its size.

Which format should you save as?

• Same as original keeps your file type, which is the easiest choice if you only want it lighter.
• JPG is the safe choice for photographs. It opens everywhere.
• WebP usually makes a smaller file at the same look, and it keeps transparent backgrounds. It suits websites, but some older programs cannot open it.
• PNG keeps every pixel, so the quality slider does not apply. It is best for logos and screenshots, and the file only gets smaller if you lower the max width.

A few honest limits

If you save a PNG or WebP with transparency as JPG, the transparent area becomes white. Images that are already heavily compressed may not get much smaller, and sometimes the result is even larger than the original, in which case the tool tells you so. Always keep your original file. If you want an exact size in pixels, use the Image Resizer.

Frequently asked questions

Related tools

How to compress an image

1. Click the upload box above, or drag your JPG, PNG or WebP image onto it. Its current size appears straight away.
2. Choose a format and, if you like, a smaller max width. Then move the quality slider. 75% is a good starting point.
3. Watch the new file size update as you change the settings, and click the download button when you are happy.

Your image is processed inside your browser, so it is never uploaded anywhere. It works on a phone, a tablet, or a computer.

Getting the best result

Compression works by throwing away detail that the eye barely notices. The lower the quality setting, the smaller the file, and at some point the loss starts to show as blur or blocky patches around edges. For most photos, a quality between 70 and 80 percent gives a big drop in size with almost no visible difference.

The biggest savings often come from the size of the picture, not the quality. A phone photo can be 4000 pixels wide, while a website rarely shows it wider than 1200. Setting a max width of 1600 or 1200 pixels can cut the file to a fraction of its size.

Which format should you save as?

• Same as original keeps your file type, which is the easiest choice if you only want it lighter.
• JPG is the safe choice for photographs. It opens everywhere.
• WebP usually makes a smaller file at the same look, and it keeps transparent backgrounds. It suits websites, but some older programs cannot open it.
• PNG keeps every pixel, so the quality slider does not apply. It is best for logos and screenshots, and the file only gets smaller if you lower the max width.

A few honest limits

If you save a PNG or WebP with transparency as JPG, the transparent area becomes white. Images that are already heavily compressed may not get much smaller, and sometimes the result is even larger than the original, in which case the tool tells you so. Always keep your original file. If you want an exact size in pixels, use the Image Resizer.

Frequently asked questions

Related tools

How to compress an image

1. Click the upload box above, or drag your JPG, PNG or WebP image onto it.
2. Choose the format to save as, and move the quality slider. 75% is a good starting point.
3. Press Compress Image, compare the sizes, and click the download button.

Your image is processed inside your browser, so it is never uploaded anywhere. It works on a phone, a tablet, or a computer.

Getting the best result

Compression works by throwing away detail that the eye barely notices. The lower the quality setting, the smaller the file, and at some point the loss starts to show as blur or blocky patches around edges. For most photos, a quality between 70 and 80 percent gives a big drop in size with almost no visible difference.

Which format should you save as?

• JPG is the safe choice. It opens everywhere, and it suits photographs very well.
• WebP usually makes a smaller file at the same look, and it keeps transparent backgrounds. Use it for websites. Some older programs cannot open it.

A few honest limits

If you upload a PNG and save as JPG, any transparent area becomes white. Images that are already heavily compressed may not get much smaller, and sometimes the result is even larger than the original, in which case the tool tells you so. Always keep your original file. If you also need smaller dimensions, use the Image Resizer.

Frequently asked questions

Related tools