Free Image Compressor
Compress JPG, PNG, and WebP images up to 80% smaller — directly in your browser. No uploads, no quality loss, batch compression supported. Free forever.
Drop images here or click to upload
Supports JPG, PNG, WebP, GIF · Multiple files OK
How it works
All compression happens entirely inside your browser using WebAssembly — your images are never uploaded to any server. Files stay 100% private.
A quality of 75–85% typically reduces file size by 50–80% with no visible difference to the human eye.
Why Use This Image Compressor?
Built for speed, privacy, and simplicity — no account or installation required.
JPG, PNG & WebP
Compress all major web image formats with adjustable quality.
Batch Compression
Upload and compress multiple images at once, then download all.
100% Private
Images never leave your device — processed with Canvas API in-browser.
Instant Results
See compressed file size and savings percentage before downloading.
Image Optimisation & Page Speed — Why It Matters
Images typically account for 50–70% of a webpage's total byte weight. Every unoptimised image is a page speed tax that your visitors pay in load time — especially on mobile connections. Google's Core Web Vitals framework directly measures Largest Contentful Paint (LCP), which is usually an image. Slow LCP is one of the most common reasons pages fail PageSpeed Insights audits.
The relationship between page speed and conversion is well-documented: a 1-second delay reduces conversions by 7% (Akamai). For e-commerce, where product images are the primary visual element, image compression is one of the highest-ROI optimisations available.
WebP format offers the best compression of any widely-supported image format — 25–35% smaller than equivalent JPG with the same perceived quality. All modern browsers support WebP. For backward compatibility, serve WebP with a JPG/PNG fallback using the HTML <picture> element.
Up to 80%
File size reduction
7%
Avg conversion drop per second of delay
100%
Private — images never uploaded
Frequently Asked Questions
Everything about image compression and web performance.
Does compressing images affect quality?
At 80% quality, most images show no visible difference while reducing size 40–70%. At 60%, minor artifacts may appear in high-detail areas. The quality slider lets you balance size vs quality.
Why is image compression important for websites?
Images are typically 60–70% of page weight. Smaller images improve page load speed, Core Web Vitals (LCP), and Google rankings. PageSpeed Insights always flags unoptimised images.
Which image format compresses best?
WebP is 25–35% smaller than JPG at similar quality. JPG is best for photos, PNG for transparency. For modern web use, WebP with a JPG fallback is recommended.
Are my images uploaded to a server?
No. Compression happens entirely in your browser using the Canvas API. Your images never leave your device.
What image sizes are supported?
No hard limit since it's browser-based. Files up to 20–30MB work comfortably on modern browsers. For batch compression, keep files under 20MB.