Image Compressor: Reduce Image Size for Free
Compress your JPG, PNG, and WebP images in seconds. Move the quality slider, watch the preview and the new file size change live, then download the smaller image. It is free, private, and needs no signup. Your image is compressed on your own device and is never uploaded.
How to Compress an Image
Add your image
Drop a JPG, PNG, or WebP file into the box, or click to choose it from your device.
Preview and pick the quality
Move the slider and watch the preview and the file size change live.
Compress and download
Click Compress, then Download to save your smaller image.
Everything You Need to Make Images Smaller
Live preview
See exactly how the image will look before you download it.
See the size change
The original size, the new size, and the percent saved update as you move the slider.
You choose the quality
Pick any quality from 10% to 95% to balance picture quality and file size.
JPG, PNG, and WebP
Add any of the three most common web image formats.
Never bigger
The tool will not give you a file that is bigger than the original.
Private by design
Your picture stays on your device. Nothing is uploaded, stored, or watermarked.
Why Compress an Image?
Large images are slow to send, slow to load, and often too big for upload forms. Compressing an image removes data you can barely see, so the file becomes much smaller while the picture still looks good. Here are the most common reasons people compress images:
- Upload limits. Job portals, government forms, and shop listings often set a maximum file size, such as 200 KB or 1 MB.
- Email and chat. Smaller pictures send faster and do not fill up the mailbox.
- Faster websites. Big images are one of the main reasons a page loads slowly. Smaller images help visitors and search rankings.
- Phone storage. Photos from a modern phone can be several MB each. Compressing saves space.
- Mobile data. A smaller file uses less data to send or download.
What Quality Should You Choose?
- 80% to 95% for photos where quality matters. The file is smaller, and the picture looks the same to the eye.
- 60% to 80% for most uses, such as websites and chats. This is usually the best balance.
- Below 60% only when the smallest possible file matters more than looks.
- Still too big? Change the picture size with the Image Resizer, then compress it again. A smaller picture means a much smaller file.
- Need to put the image in a document? Use the JPG to PDF converter.
- Image saved as WebP and not opening everywhere? Use the WebP to PNG and JPG converter.
- Photos from an iPhone in HEIC format? Use the HEIC to JPG converter first.
Things to Know Before You Compress
The compressed result is always saved as a JPG file, because JPG gives the best size reduction for photos. JPG cannot be transparent, so a transparent background becomes white. If you need to keep a transparent logo or icon, keep your original PNG file.
Is It Safe to Compress Images Online?
Many online compressors upload your pictures to a server. BixTools works differently. Your image is opened and compressed inside your own browser, so it never leaves your device. We do not store, share, or look at your files.
Related Free PDF and Image Tools
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All PDF and Image Tools
Browse every free tool on BixTools.
Frequently Asked Questions
Is this image compressor free?
Yes. BixTools is completely free. There is no signup, no watermark, and no limit on how many images you compress.
Is my image uploaded to a server?
No. Your image is opened and compressed inside your own browser, so it never leaves your device. We do not upload or store your pictures.
How do I compress an image?
Add your image, move the quality slider while you watch the preview and the file size, then click Compress. When it is ready, click Download.
How much smaller will my image get?
It depends on the image. Large photos often shrink by 50% to 80%. Lower quality makes the file smaller, and higher quality keeps more detail.
Which image formats can I compress?
You can add JPG, PNG, and WebP images. The compressed result is saved as a JPG file, which gives the best size reduction for photos.
Which quality setting should I choose?
For most photos, 70% to 80% gives a much smaller file that still looks good. Use 85% or higher when quality matters most, and go lower only when the smallest size is the goal.
What happens to a transparent background?
The result is a JPG, and JPG cannot be transparent, so transparent areas become white. If you need to keep transparency, use the PNG file as it is.
Why did my file not get smaller?
Some files are already well compressed, and some PNG images with flat colors are tiny already. If the new size is not smaller, lower the quality. The tool will not offer a file that is bigger than the original.
Will compressing reduce the image quality?
JPG is a lossy format, so a small difference is possible. At 80% quality and above, most photos look the same to the eye. The live preview lets you check before you download.
Can I compress a very large image?
Yes. Images larger than about 16 megapixels are scaled down a little, because some phone browsers cannot handle bigger pictures. This also makes the file smaller.