Compress Image Online Free
Reduce image file size with an adjustable quality slider. Preview and download in one click.
Drop an image here
or
Your images never leave your browser
How to Compress an Image
Upload image
Drop or select a JPG, PNG, or WebP file from your device.
Set quality
Use the slider to balance file size and visual quality, then compress.
Download
Compare before/after sizes and download your optimized image.
Frequently Asked Questions
How does image compression work here?
Your image is drawn onto a canvas in the browser and re-encoded with a quality setting you control. Nothing is uploaded to a server.
Will quality get worse?
Lower quality values create smaller files with more compression artifacts. Start around 70–85% for web photos and adjust until the preview looks good.
Is my image uploaded to Site95?
No. Compression is private by default and runs entirely in your browser. We never receive your file.
What formats are supported?
JPG, PNG, and WebP as input. You can export as JPEG, PNG, or WebP. JPEG and WebP use the quality slider most effectively.
Is there a file size limit?
For reliable browser processing we recommend staying under about 25 MB. Extremely large photos may fail on mobile devices with limited memory.
Can I compress screenshots for email?
Yes. Large PNG screenshots often shrink a lot when exported as JPEG or WebP at moderate quality.
Free Image Compressor for Web & Email
Large photos slow down websites and bounce off email attachment limits. Site95's free compress image tool re-encodes your file in the browser so you can see the new size before you download.
For more tips, read our guide on how to compress images for the web, or try resize and convert tools next.