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Image Optimizer: Optimize Images for Websites, Free (WebP)

Make your website load faster by optimizing its images. This tool saves them as WebP at 80% quality, a good balance of small files and sharp pictures, and works on up to 50 images at once. Your images never leave your device.

Your images never leave your device. No sign-up, no watermark.

Compress by

75% makes files much smaller and still looks the same to most people.

How to optimize images for the web

  1. Resize large photos first: most website images don’t need to be wider than 1600 to 2000 pixels. The Bulk Image Resizer does this.
  2. Add your images here. WebP at 80% quality is already set.
  3. Check the before-and-after sizes and the comparison, then download the images or the ZIP.
  4. Upload the new files to your website in place of the old ones.

Why optimized images matter

Images are usually the largest part of a web page. Big image files make pages slow, especially on phones, and page speed affects how long visitors stay and how search engines see your site. Optimizing typically makes images half the size or less with no visible difference.

Tips for faster pages

  • Use WebP: it’s supported by all current browsers and is usually much smaller than JPG or PNG at the same quality.
  • Don’t upload huge photos: a 4000-pixel phone photo shown 800 pixels wide wastes most of its size.
  • Use PNG only when you must: for logos with sharp edges or transparency. WebP also keeps transparency.
  • Need an exact limit? Switch to “Exact file size” to make each image, for example, under 100 KB.

Questions

Does WebP work in all browsers?

Yes. Chrome, Edge, Firefox, Safari and their phone versions all show WebP. Some older desktop software and email programs don’t open it, so keep JPG for files you send as attachments.

Will my WordPress site accept WebP?

Yes. WordPress has supported WebP uploads since version 5.8.

Is 80% quality enough?

For most website photos, yes. Use the slider to go higher for photography portfolios, or lower for thumbnails, and compare the result before downloading.

Are my images uploaded?

No. Optimizing happens in your browser on your own device, and nothing is sent to a server.

More tools: Bulk Image Compressor, JPG to WebP, Bulk Image Resizer, Image Compressor, EXIF Remover.