Free Online Image Optimizer

Crop, resize and convert images to WebP — right in your browser. No upload, no signup, no limits. Your images never leave your device.

Drag & drop your image here

or browse files · paste from clipboard (Ctrl+V)

PNG · JPG · GIF · BMP · AVIF  →  optimized WebP

Why optimize your images with us?

100% Private

Everything runs locally in your browser using the Canvas API. Your images are never uploaded to any server — perfect for confidential or client work.

Instant & Free

No queues, no accounts, no watermarks and no file count limits. Because processing happens on your device, results are ready in milliseconds.

Crop & Resize

Precise cropping with aspect-ratio presets (1:1, 4:3, 3:2, 16:9, 9:16), rotation, and pixel-perfect resizing with locked proportions.

Modern WebP Compression

Convert PNG, JPG and GIF to WebP and cut file sizes by 25–35% at identical quality — with a quality slider to find your perfect balance.

Better SEO & Core Web Vitals

Smaller images improve Largest Contentful Paint (LCP), page speed scores and search rankings. WebP is recommended by Google PageSpeed Insights.

Works Everywhere

Fully responsive and touch-friendly. Optimize images on your phone, tablet or desktop — no app install required.

How to optimize an image in 3 steps

  1. Select your image

    Drag & drop an image onto the drop zone, paste it from your clipboard, or click to browse your files. PNG, JPG, GIF, BMP and AVIF are supported.

  2. Crop & resize

    Drag the crop handles to frame the perfect area, choose an aspect-ratio preset, rotate if needed, and set your exact target width and height in pixels.

  3. Download the WebP

    Fine-tune the quality slider, watch the file-size savings update in real time, and download your optimized WebP — ready for your website.

What is WebP and why does it matter for your website?

WebP is a modern image format developed by Google that provides superior lossy and lossless compression for images on the web. WebP images are typically 25–35% smaller than comparable JPEG and PNG files, while also supporting transparency (like PNG) at much smaller sizes.

Since 2021, image optimization directly affects your Google rankings: page experience signals such as Largest Contentful Paint (LCP) — a Core Web Vitals metric — are heavily influenced by image file sizes. Converting your images to WebP is one of the highest-impact, lowest-effort speed optimizations available, and WebP is supported by all modern browsers including Chrome, Firefox, Safari and Edge.

  • Faster page loads and lower bandwidth costs
  • Better Core Web Vitals scores and SEO rankings
  • Transparency support at a fraction of PNG file size
  • Supported by over 97% of browsers worldwide

Frequently asked questions

Is this image optimizer really free?

Yes. Web Image Optimizer is completely free with no hidden costs, no watermarks and no usage limits. You can optimize as many images as you like.

Are my images uploaded to a server?

No. All image processing happens locally in your browser using the HTML5 Canvas API. Your images never leave your device, which makes the tool 100% private and extremely fast.

What is WebP and why should I use it?

WebP is a modern image format developed by Google. It provides 25–35% smaller file sizes than JPEG and PNG at the same visual quality, supports transparency and is supported by all modern browsers. Smaller images mean faster page loads, better Core Web Vitals and improved SEO rankings.

Which image formats can I convert?

You can open PNG, JPEG, GIF, WebP, BMP and AVIF images and convert them to optimized WebP. Animated GIFs are converted as a static first frame.

What quality setting should I use for WebP?

For most web images, a quality of 75–85 offers the best balance between file size and visual quality. Use 90+ for hero images or photography where detail matters, and 60–70 for thumbnails.

Does the tool work on mobile devices?

Yes. Web Image Optimizer is fully responsive and works on smartphones, tablets and desktop computers — directly in the browser, without installing any app.