How to compress or resize images
- Choose images or drop them onto the box. You can add several at once.
- Pick an output format and quality, and optionally a new size.
- Each image is processed straight away. Check the new size and the preview.
- Download images one at a time, or all together as a ZIP file.
Changing any option re-processes all the images from the originals, so you can experiment freely.
Your privacy
- Images are processed in your browser and are never uploaded.
- Re-encoding removes hidden metadata, such as the camera model, the date and the GPS location where a photo was taken. This is worth doing before sharing photos online.
- Photos are rotated according to their orientation data before it is removed, so they stay the right way up.
Resizing
- Fit within shrinks each image to fit inside the width and height you choose, keeping its proportions.
- Percentage scales every image by the same amount.
- Images are never enlarged, because that only makes them blurry.
- Large reductions are done in several halving steps for sharper results.
Limitations
- Animated GIF and WebP images become a still image of their first frame.
- Colours are converted to standard sRGB. Photos in wide colour spaces, such as Display P3 from recent phones, may look very slightly less vivid.
- Very large images are reduced to about 16.7 megapixels, the most that every browser can process. Which formats you can save depends on your browser: WebP and AVIF options appear only when your browser can create them.
Frequently asked questions
Are my photos uploaded?
No. Images are decoded, resized and re-encoded by your browser on your device, using the same graphics features that display web pages. They never leave your computer or phone, which also makes the tool fast: there is nothing to upload or download except the result you save.
Which format should I choose?
WebP usually gives the smallest files and works in every modern browser, so it is ideal for websites. JPEG is best when you need maximum compatibility, for example for email or older software. PNG is lossless and suits screenshots, diagrams and images with transparency, but photos saved as PNG are large. AVIF can be smaller still, but few browsers can create it yet; the option appears automatically when yours can.
What quality setting should I use?
For photos, 75–85 is a good balance: files are much smaller and the difference is hard to see. Go lower for thumbnails, or higher for images that will be edited again. Quality does not apply to PNG, which is always lossless.
Why is my compressed image bigger than the original?
This happens when the original was already heavily compressed, or when converting a photo to PNG. Try a lower quality, choose WebP, or resize the image. The tool always re-encodes the image so that hidden metadata such as GPS location is removed, even when that makes the file slightly larger.