Image Compressor (JPG, PNG, WebP)

Make images smaller and websites faster

Large images are the number one reason websites load slowly. A single photo straight from a phone camera can be 3-5 MB, while a well-compressed version that looks the same on screen is often 150-400 KB. This image compressor shrinks JPG, PNG and WebP files in your browser, so your photos are never uploaded and the results are ready in seconds.

Features:

• Batch compression of up to 30 images at once
• A quality slider from 10% to 95%
• Output as JPG, WebP or the same format
• Optional max width to resize oversized photos
• A results table with before size, after size and percent saved
• Download one by one or as a ZIP
• It never returns a bigger file: if compression cannot help, your original is kept

How to compress images

1. Choose or drop your images.
2. Set the quality. 70-80% is the sweet spot for most photos.
3. Choose the output format. WebP usually gives the smallest files.
4. Optionally set a max width, such as 1920 px for full-width website images.
5. Click Compress images and download the results.

Which settings should I use?

PNG files are converted to WebP when you choose "same as original", because browsers cannot compress PNG with a quality setting. WebP keeps transparency. If you need JPG, transparent areas become white.

Why image compression matters for SEO

Page speed affects user experience and Google's Core Web Vitals. Large images slow down the Largest Contentful Paint, one of those key metrics. Google's own WebP documentation reports that WebP files are typically much smaller than comparable JPG and PNG files.

After compressing, check your page weight with the Page Size Checker, give every image good alt text using the Image Alt Checker, and change exact dimensions with the Image Resizer. See all PDF and image tools.

Compress, then check

After uploading your compressed images, run the Page Size Checker on the page to confirm it got lighter, and the Website SEO Audit for other speed issues. For product photos with a background you want to remove from view, crop them first with the Image Cropper.

Recommended settings by use

Start with quality 75-80. Most people cannot see a difference from the original at this level, but the file is often several times smaller.

Lossy vs. lossless compression

Lossy compression (JPG and lossy WebP) throws away detail the eye barely notices, giving big savings. Lossless compression (PNG) keeps every pixel, which is why PNG photos are large. For photos, lossy is almost always the better choice. For screenshots with text or logos with sharp edges, PNG or high-quality WebP keeps lines clean.

Why WebP is usually the winner

WebP was created by Google for the web and is supported by all modern browsers. Google's own WebP documentation reports that lossy WebP images are typically 25-34 percent smaller than comparable JPG files, and WebP also supports transparency like PNG. If your website platform accepts WebP, it is usually the best format to upload.

Images, speed and SEO

Images are often the heaviest part of a page. Smaller images mean:

• Faster Largest Contentful Paint (LCP), one of Google's Core Web Vitals.
• Less mobile data used by your visitors.
• Lower bandwidth and storage costs on your hosting.

After compressing, add descriptive alt text and check it with the Image Alt Checker, then measure the page with the Page Size Checker.

Hitting a size target like 100 KB or 50 KB

Some forms require photos under a certain size. Reduce the max width first (for example to 800 px), then lower the quality step by step until the file is small enough. Dimension has a much bigger effect on file size than quality alone. For exact pixel sizes, use the Image Resizer, and to change format only, the Image Converter.

Everything runs in your browser using the built-in image engine, so your photos are never uploaded.

Example: preparing photos for a blog post

You took six photos on your phone for a blog post. Each is about 4 MB and 4000 pixels wide.

1. Add all six photos to the compressor.
2. Choose WebP, quality 75 and max width 1280 px.
3. Download the ZIP. Each photo is now typically a few hundred kilobytes or less.
4. Rename each file with a descriptive name, for example faisalabad-office-reception.webp.
5. Upload them to your blog and add alt text.

The whole set may go from about 24 MB to around 1-2 MB, which makes the article load much faster on mobile data. Exact results depend on the photos: busy scenes with lots of detail compress less than simple images with plain backgrounds.

Last updated: October 25, 2026