Image Compressor
Reduce the file size of your JPG, PNG, or WebP images. Choose a quality level or set a target file size.
Drag and drop an image here, or
PNG is lossless, so it ignores the quality slider.
Choose an image and press Compress to see your result.
Files never leave your browser.
Compress Image Files in Seconds, Free
When you need to compress image files, you want smaller file sizes without your photos looking worse. Pixel File lets you compress image files right in your browser: drop in a JPG, PNG or WebP photo, choose a quality level or a target size, and download a smaller file in seconds. There is no signup, no watermark, and no upload – your files never leave your device.
Large images are the most common reason web pages load slowly and emails bounce back. A 5 MB phone photo compressed to 800 KB keeps the same dimensions and looks nearly identical, but it uploads six times faster and counts far less against attachment limits. This tool is built for exactly that tradeoff: maximum size reduction at the smallest visible cost in quality.
How to Use the Image Compressor
- Drop your image into the tool above or click to browse your device. JPG, PNG and WebP files are supported.
- Move the quality slider, or switch to target-size mode and type the file size you want, such as 500 KB. You will see a live preview with the original and compressed sizes side by side.
- Click Compress and download the smaller file. Compare it with the original, and adjust the quality if you want a smaller file or a sharper image.
How It Works
JPEG compression works by quantization: the image is broken into small blocks and fine detail the eye barely notices is discarded. Lowering the quality number increases that discarding, so the file shrinks fast. Quality 80 usually cuts a photo’s size by 70 to 85 percent while remaining visually identical on a screen. PNG is lossless, so it cannot use quality quantization; instead it is re-encoded more efficiently, which trims the size without changing a single pixel. WebP supports both modes and is switched to lossy quantization for maximum savings.
Target-size mode simply automates the slider: it tries a quality value, measures the result, and adjusts until the output lands as close as possible to the size you typed. All of this happens locally in your browser using the same image-encoding engine your browser uses to display photos, so nothing is sent to any server.
A Worked Example
Take a typical 4.2 MB vacation photo shot on a phone at 4032 by 3024 pixels. Compressing it at quality 80 produces a file of about 890 KB – a reduction of nearly 79 percent – while the image still looks sharp on a laptop screen and in a social post. Pushing to quality 60 brings it down to roughly 520 KB, which is fine for a blog thumbnail but may show softness in smooth areas like sky. For PNG, a 1.8 MB screenshot with flat colors re-encodes to about 900 KB with zero visual change, because the re-encoding is lossless.
Frequently Asked Questions
Will compressing reduce my image’s dimensions?
No. This tool reduces file size only; the pixel dimensions stay exactly the same. If you also need smaller dimensions, use our resize image tool first or afterwards.
Is there a file size or count limit?
There is no signup and no artificial limit on how many images you compress. Very large images take longer on slower devices, so batching several huge photos may feel sluggish on older phones.
Can I compress a PNG without losing quality?
Yes. PNG compression here is lossless: the file gets smaller through better encoding, and every pixel stays identical. Savings are modest, usually 10 to 40 percent.
Which quality setting should I choose?
Quality 80 is the sweet spot for photos headed to the web: big savings with no visible difference. Use 60 to 70 for thumbnails and small previews, and 90 or above when the image will be printed or zoomed.
Is my photo uploaded anywhere?
No. The tool runs 100% in your browser, so your files never leave your device. There is nothing to upload and nothing stored on a server.
Why did my WebP shrink so much more than my PNG?
WebP supports lossy compression, so it can discard invisible detail like a JPEG does. PNG is always lossless, so it can only be re-encoded more efficiently, which yields smaller savings.
More Free Tools
After compression, you may also want to resize an image to exact pixel dimensions for social posts, convert image format between JPG, PNG and WebP, convert HEIC photos from your iPhone to JPG, or compress a PDF before attaching it to an email. Every tool on Pixel File is free and runs entirely in your browser.