How to optimize images
- 1
Drop your images into the box above, click to browse, or paste them with Ctrl+V. You can mix JPG, PNG and WebP files.
- 2
Pick a quality preset. Balanced suits most websites; choose a target size instead if you need every file under a limit.
- 3
Use the Resize tab to make large photos smaller, such as 1920 pixels wide for a website, then download one image or all of them as a ZIP.
Why optimize images?
Images are usually the heaviest part of a web page. Photos straight from a phone or camera are often 3–10 MB each, many times more than a page needs, which slows down loading, hurts search rankings and fills up email attachments.
Optimizing re-saves each image with a smarter encoder and settings that keep it looking the same. JPG photos are encoded with MozJPEG, PNG graphics get a reduced colour palette that keeps transparency, and WebP images are re-encoded at the chosen quality. Typical savings are 40–80%.
Tips for web images
- Resize before you compress: a photo shown 1200 pixels wide doesn’t need 4000 pixels.
- Use JPG or WebP for photos, and PNG for logos, screenshots and anything with transparency.
- Hold “Compare” in the editor to check the result against the original before downloading.
Frequently asked questions
What is the difference from Compress JPEG?
Compress JPEG saves everything as JPG. The optimizer keeps each file in its own format, so PNG logos keep their transparency and WebP images stay WebP.
Which formats are changed?
JPG, PNG and WebP keep their format. Formats that websites can't always show, such as HEIC, TIFF, BMP and AVIF, are saved as JPG, and GIF, SVG and ICO as PNG. You can choose another format in the Convert tab.
Can an optimized file be bigger than the original?
No. If an image you haven't otherwise changed cannot be made smaller, you get the original file back unchanged.
Does it remove photo metadata?
Yes. Re-saved images no longer carry hidden details such as the camera model and GPS location, which also saves a few kilobytes.
Are my images uploaded?
No. Everything runs in your browser, and your images never leave your device.