Compress Image Online Free

No upload to server. Runs entirely in your browser - 100% private.

Drop your image here

or click to browse · JPG, PNG, WebP, AVIF supported

How to Use

01

Upload an image by dragging it into the drop zone or clicking to browse your files.

02

Select your desired output format (JPG, PNG, or WebP) and adjust the quality slider.

03

Optionally set a max width in pixels to resize the image proportionally while compressing.

04

Click Compress Image to process the file.

05

Use the before/after comparison slider to review the result, then click Download to save.

What is the Image Compressor?

Image compression reduces file size while maintaining acceptable visual quality. There are three main formats to choose from: JPEG (lossy compression, best for photographs, does not support transparency), PNG (lossless compression, best for screenshots, graphics, and logos that require transparency or pixel-perfect sharpness), and WebP (Google's modern format, 25–35% smaller than JPEG at equivalent quality, supported by all modern browsers since 2020). Lossy compression works by discarding high-frequency image detail that the human eye cannot perceive at normal viewing distances - this is why a 50 KB compressed photo is visually indistinguishable from a 500 KB original for most web use cases.

Why compress images?

Page load speed is a direct Google ranking factor through Core Web Vitals, specifically the Largest Contentful Paint metric. Images account for approximately 75% of total page weight on the average website, making them the single largest contributor to slow load times. A two-second delay in page load reduces conversions by 4.42% per second according to Portent research. Compressing images before uploading them to any website, blog, or e-commerce platform directly improves both search engine rankings and user experience.

Pro Tip
All processing happens entirely in your browser - no files are uploaded to any server. Your documents never leave your device. For website images, use WebP format whenever your site supports it - all modern browsers have supported WebP since 2020. For photographs, JPEG at 80% quality is visually indistinguishable from 100% quality while being 50–70% smaller. Reserve PNG only for images that require transparency or must have pixel-perfect sharpness, such as logos and screenshots containing text.

Frequently Asked Questions