Image Compressor — Compress & Reduce Image Size

What Is an Image Compressor?

An image compressor is a tool that reduces the file size of a photo or graphic by re-encoding it more efficiently. Smaller images load faster on websites, take up less storage, and are easier to send by email or upload to forms with size limits.

This free image compressor works entirely in your browser. You choose how much to compress with a quality slider, so you stay in control of the balance between file size and visual quality instead of relying on a fixed preset.

How to Compress an Image Online

Compressing an image takes only a few seconds. Upload your JPG, PNG, or WebP file using the box above, then move the quality slider to set your compression level. Lower quality produces a smaller file; higher quality keeps more detail.

Preview the result, then download the compressed image. Because all processing happens locally in your browser, your file is never sent to a server, which keeps sensitive images private.

How Much Can You Reduce Image File Size?

Typical savings range from about 40% to 80% depending on the original format and the quality setting you choose. A 1 MB JPEG can often drop to 200-300 KB with little visible difference at normal viewing sizes.

The relationship between quality and size is not linear. Reducing quality from 100% to around 80% often cuts size dramatically while looking almost identical, while very low settings save little extra and start to show visible artifacts.

Compress Images Without Unnecessary Quality Loss

For most web images, a quality setting of 70-80% offers an excellent balance: a much smaller file with no obvious loss of detail. For photos with smooth gradients like skies, use a slightly higher setting because compression artifacts are easier to spot there.

Always start from the largest, highest-quality original you have. Compressing an image that was already compressed multiple times adds artifacts without saving much space, so keep a backup of your originals.

Choosing the Right Format Before Compressing

Format affects how small your file can get. JPEG suits photographs, PNG suits graphics with text, sharp edges, or transparency, and WebP usually produces files 25-35% smaller than JPEG at the same quality.

If you want the smallest possible files for a modern website, convert your images to WebP before or after compressing, then resize them to the exact dimensions they will be displayed at.

• Image Resizer
• JPG to WebP
• PNG to WebP
• Crop Image

Common Image Compression Mistakes

The most common mistake is compressing too aggressively so artifacts become visible; always preview at full size before publishing. Another is forgetting to resize a huge image first — a 4000px photo shown at 800px wastes bandwidth even after compression.

Using the wrong format also costs you. Saving a simple logo as a heavily compressed JPEG can look worse and weigh more than a clean PNG or WebP. Match the format to the type of image for the best results.

Image Compression for E-Commerce and Product Photos

Product images directly affect conversion rates, and page speed directly affects SEO. Compressing product photos without visible quality loss is essential for e-commerce stores. A quality setting of 75-85% preserves fabric textures, product details, and color accuracy while keeping file sizes under 200 KB.

For catalog images displayed at thumbnail size (300-500px wide), compress more aggressively since fine details are not visible at small sizes. For zoom-enabled product photos that enlarge on click, use a higher quality setting to keep details sharp. Combine compression with the Image Resizer to match your platform's exact dimension requirements.

• Image Resizer
• Crop Image
• JPG to WebP
• PNG to WebP

Image Compression vs Image Optimization for Web Performance

Image compression is one part of a complete image optimization strategy. Compression reduces file size through re-encoding. Image optimization also includes choosing the right format, using responsive images with srcset, adding lazy loading, and serving next-gen formats like WebP.

For the best web performance workflow: resize images to their display dimensions, convert to WebP format for modern browsers, compress at 70-80% quality, and serve a JPEG fallback for older browsers. This approach can reduce total page image weight by 60-80% compared to unoptimized originals.

• JPG to WebP
• Image Resizer
• Crop Image

Related Tools

Image Workflow

Continue your image editing workflow:

Popular Tools