Image compressor
Compress JPG, PNG, WebP, AVIF, GIF and HEIC images to a smaller file size, one image or hundreds at once. No sign-up, no limits, and nothing is uploaded.
or drop them here
JPG, PNG, WebP, AVIF, GIF or HEIC. Any number of files, compressed on this device.
Before and after
Preparing the preview
- Original
- -
- Compressed
- -
How it works
An image compressor makes image files smaller so they load faster and fit upload limits. This one lowers the quality setting of JPG, WebP and AVIF files, reduces the colors of PNG files and can resize images or aim for a file size. It works on any number of images at once, entirely in your browser, with a ZIP download.
- Add your images
Choose, drop or paste JPG, PNG, WebP, AVIF, GIF or HEIC files. Compression starts right away.
- Adjust if you like
Pick a format, a quality or a target size, and an optional maximum width or height. Results update as you change them.
- Compare and download
Check the before and after up close, then download one image or all of them as a ZIP.
Which format and setting to use
| Image | Good choice | Why |
|---|---|---|
| Photos | JPG or WebP, quality 70 to 80 | Fine detail and noise hide small losses, so the file can shrink a lot. |
| Screenshots, logos, charts | PNG with 256 colors or fewer | Flat colors and sharp edges stay crisp, and few colors compress well. |
| Images with transparency | PNG or WebP | JPG has no transparency, so transparent areas turn white. |
| iPhone photos (HEIC) | JPG | JPG opens everywhere; many apps and websites still refuse HEIC. |
| Upload limits, such as 100 KB | Target size | The tool finds the best quality that fits under the limit. |
Where your images go
Nowhere. The page loads its code from airusk.com, then compresses your images inside this browser tab, in a background worker so the page stays responsive even with hundreds of photos. No image is sent to a server, and closing the tab clears everything. To check, open your browser's developer tools, choose the Network tab and compress a few images: no upload appears.
What changes in the file
- Metadata: location (GPS), camera model, date and all other EXIF data are removed. Photos a phone saved sideways are turned upright first, or keep only their orientation tag if you choose that option.
- Transparency: kept in PNG and WebP. JPG cannot store it, so transparent areas are filled with white.
- Colors: saved in sRGB, the standard for the web. Photos in a wider color space, such as Display P3 from recent phones, are converted.
- Animation: animated GIF, PNG and WebP files are kept as they are when you save in the same format, because saving them again would keep only the first frame.
- Never larger: if a compressed file would not be smaller than the original, the original is kept and the list says so.
Why WebP and PNG colors save so much
WebP is a newer format than JPG. Google's own tests found WebP photos 25 to 34% smaller than JPG at the same visual quality, and every current browser can show them. PNG is lossless, so its size depends on how many different colors the image has. Reducing a screenshot or logo to 256 colors or fewer usually cuts the file by more than half while it looks the same.
No limits, except your device
There is no cap on the number of images or their size, and no watermark. Very large images are bounded by the memory of your device: images over 50 megapixels (about 16.8 on iPhone and iPad) are processed at a smaller size, and the list tells you when that happens.
Frequently asked questions
How do I compress an image without losing quality?
Keep the Quality setting at 70 to 85 for JPG or WebP. Most photos look the same at that level while the file gets much smaller, and the before and after view lets you check at 100% zoom before you download. Leave Max width and Max height empty to keep the original dimensions. For PNG, choose All colors (lossless) to keep every pixel exactly, or 256 colors for a much smaller file that usually looks the same.
Is it safe to compress images on this tool? Does it upload my files anywhere?
No files are uploaded. The compressor decodes and re-encodes each image inside your browser, in a background worker, and offers the result as a download. No server receives your images, so it is safe for private photos, product shots and client work. Location and camera metadata are removed from the compressed files as well.
How do I compress multiple images at once?
Choose or drop as many images as you like; there is no limit on the number of files. Each one is compressed with the same settings as soon as it is added, and the list shows the new size and the savings for every file. Download a single image from its row, or click Download all (ZIP) to get them bundled in one ZIP file.
Can I resize images while compressing them?
Yes. Enter a Max width, a Max height or both. Larger images shrink to fit and keep their aspect ratio, and smaller ones keep their size. For example, a 3000 × 2000 photo with Max width 1200 becomes 1200 × 800. Resizing is the most effective way to shrink photos that are much larger than the screen they will be shown on.
How do I compress an image to a specific size, like 100 KB?
Choose Target size, enter the size (for example 100 KB) and add your images. The tool searches for the highest quality that stays at or under the size. If even the lowest quality is too big, it also reduces the pixel dimensions, unless you turn that off. It counts 1 KB as 1,000 bytes, so the files also pass limits that count 1 KB as 1,024 bytes.
Why is my compressed image not smaller?
An image that was already compressed well, such as a photo from a messaging app or a PNG that was optimized before, may not shrink further at your settings. The tool never gives you a larger file: it keeps the original and says so in the list. Try a lower quality, fewer PNG colors, the WebP format or a smaller maximum width.
What is a limitation of browser-based image compression?
Browsers cannot save every format. Most cannot write AVIF yet: when yours cannot, the AVIF option is turned off and AVIF originals are saved as WebP. HEIC can be read but not written, so HEIC photos are saved as JPG. Animated images keep their animation only when saved in the same format. Very large images are limited by your device's memory, so images over 50 megapixels are processed at a smaller size.