Free tool · Edit
Compress Image
Shrink image file size without visible quality loss.
Reduce the file size of a JPG, PNG, or WEBP image while keeping quality high enough that the difference is not visible at normal viewing size. Useful for email attachments, faster-loading websites, and staying under upload size limits.
- Files never leave your device
- Runs entirely in your browser
- Free, no account needed
How to use Compress Image
Two steps, and nothing to install.
Drop your image
Drop a JPG, PNG or WEBP onto the tool, or click to browse and select it. The file never leaves your browser.
Download the smaller file
The image is re-encoded at a quality level tuned to cut size without a visible difference, then offered for download.
More free tools
Free, private, and no sign-up on any of them.
How this works in your browser
Compression here means a controlled re-encode, not a magic size reduction. The image is decoded onto an HTML5 canvas and exported again through the browser’s encoder with an explicit quality parameter, which governs how aggressively the encoder discards perceptual detail the eye is least likely to miss. Nothing is resampled, so the output has exactly the same pixel dimensions as the input. This is also why results vary so much by image: photographs with gradients and texture have a lot of redundancy to exploit, while flat-colour screenshots and line art have very little.
Compress Image vs. upload-based online tools
| Feature | Compress Image (in-browser) | Upload-based online tools |
|---|---|---|
| File upload required | No - never leaves your device | Yes - file is sent to a server |
| Processing queue | None - starts instantly | Often, especially at peak times |
| Watermark on output | Never | Common on free plans |
| Usage limits | None - free, unlimited use | Often capped per day or file size |
| Works offline once loaded | Yes, for most tools | No - requires a live connection |
| Account required | No | Often, for anything beyond a trial |
Who uses Compress Image
Getting under an attachment limit
Shrink photos enough to send by email or upload to a form that caps file size, without cropping anything out.
Speeding up a website
Reduce the byte weight of images that dominate page load, which is usually the single biggest performance win available.
Freeing up storage
Compress a batch of photos that are larger than they need to be for viewing or sharing.
Frequently asked questions
What it can and cannot do, and what happens to your files.
How much smaller will my file get?
It depends on the source image, but photos typically shrink by 50-80% with no visible quality change.
Which formats can I compress?
JPG, PNG and WEBP are all supported.
Is there a limit on how many images I can compress?
No. There is no usage cap, watermark, or account requirement.
Does compressing reduce the image dimensions?
No. Compression changes how the pixels are stored, not how many there are. If you also want fewer pixels, resize the image first and then compress, which usually saves far more than either step alone.
Why did compressing barely shrink my file?
Some images are already near their practical floor, and PNG screenshots of flat interfaces often compress poorly as JPEG because the format is tuned for photographic detail. Very small or already heavily compressed files also have little left to remove.
Can I compress the same image twice?
You can, but avoid it. Each lossy pass discards more detail permanently, and the second pass usually costs noticeable quality for very little extra saving.
Compress your image - smaller files, same quality.
Files never leave your device. No upload, no account, and free for unlimited use.
Also see: Resize Image