Web Image Optimizer

Compress images in bulk and convert them to web-friendly formats (WebP, JPEG, PNG), with adjustable maximum width and compression quality to significantly reduce file size. All processing happens locally in your browser.

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Drop an image or click to upload

PNG, JPG, WEBP, BMP (up to 10)

What Is Web Image Optimization?

Web image optimization reduces file size through compression, resizing, and format conversion, which speeds up page loading and saves bandwidth.

A common approach is to output WebP and choose an appropriate compression quality to balance quality against file size.

How to Use

Optimize your images in three steps:

  • Upload images (up to 10) in PNG, JPG, WEBP, or BMP format.
  • Set the maximum width, quality, and output format (WebP/JPEG/PNG).
  • Click Optimize All, then download images individually or as a ZIP.

Tips

  • For web background images, output WebP and lower the quality a bit.
  • For icons or images that need transparency, choose PNG or WebP.
  • Compare the old and new file sizes before optimizing to avoid over-compressing.

Frequently Asked Questions

Will the optimized images lose quality?+
You can control the compression strength with the quality slider. Higher quality means less visible loss but larger files; lower quality produces smaller files with more visible loss.
Is WebP better than JPEG?+
At the same visual quality, WebP is usually smaller than JPEG, which makes it great for websites. JPEG has the broadest compatibility and is a safe choice when wide support is needed.
Can I optimize multiple images at once?+
Yes. You can upload up to 10 images at a time. After optimizing, you can download them individually or package them all into a ZIP file.
Are my images uploaded to a server?+
No. All compression and format conversion happens locally in your browser — your images never leave your device.

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Web Image Optimizer — free online web image optimizer, image compression, WebP converter, batch compress images, speed up web pages, image optimizer. No signup required. Works in your browser.