Compress Images Online

Compressing an image here is a four-step loop: drop the file, set the quality, check the preview, and download. The tool accepts JPG, PNG, and WebP files up to 50 MB, and it re-encodes the image in your browser with the Canvas API instead of sending it to a server. Because the encode happens locally, the page can show a live before-and-after comparison for every quality level you try, and the download starts the moment you are happy with the result. To make it concrete: a 4.2 MB phone photo dropped in and compressed at 70% typically comes out at 400-500 KB, roughly 90% lighter, with no visible change at normal screen sizes.

1. 1Drop or select an image. JPG, PNG, and WebP files up to 50 MB are accepted.
2. 2Drag the quality slider and watch the estimated file size change in real time.
3. 3Use the before/after slider to confirm the visible difference at the current setting.
4. 4Download the compressed image. Your original file is never modified.

Compression savings are not a fixed number, because the lossy encoders behind JPG and WebP spend their size budget on detail and noise. A clean screenshot at quality 70% typically drops 80-90% of its weight, while a photo full of fine texture or sensor noise may only drop 40-60% before visible artifacts appear. The honest answer comes from the preview: try 70%, look at the before/after comparison, then step down in 5-point increments until the size fits your use case. Experimenting costs nothing, because every attempt runs locally.

• Screenshots and UI graphics with large flat areas shrink the most.
• Photos with smooth gradients, such as sky, skin, and product shots, compress well at 60-80%.
• Images full of noise or fine texture compress the least and show artifacts soonest.

The format you bring in decides how much compression can help. JPG files are already lossy, so re-encoding them at a lower quality is the main lever, and that is where most of the savings on this page come from. WebP files compress the same way but at a better quality-per-byte ratio, so converting a JPG to WebP usually beats compressing the JPG alone. PNG files are lossless, so re-encoding a PNG as PNG barely changes its size; the quality slider is hidden for PNG for exactly that reason. To shrink a PNG, convert it to JPG or WebP first, then adjust the quality of the converted file.

Compression discards detail, while resizing discards pixels. They are different problems, and for very large photos the order matters. A 4000x3000 camera photo resized to 1600px wide typically loses 70-80% of its file size before any compression is applied, simply because there are fewer pixels left to encode. The practical rule is to resize first to the dimensions you actually need, then compress the result. This page covers the compression half; the resizer handles the dimensions, and the fixed-size tools combine both by shrinking to a target file size automatically.

There is no universal setting, but the ranges below are a reliable starting point. The preview exists so you can confirm the setting before downloading rather than trusting a formula, and lowering the quality by 5 points at a time lets you find the smallest file that still looks right.

• Avatars and thumbnails: 40-60%. The image is viewed small, so the eye tolerates more compression.
• Blog and content images: 65-80%. Detail holds up well at normal screen sizes.
• Photos you might zoom into: 80-90%. Keeps visible grain and texture intact at the cost of a larger file.

Every image processed on this page is handled by the Canvas API inside your browser. Nothing is uploaded, no account is required, and there is no queue to wait in. That makes the tool a sensible choice for sensitive material, such as screenshots of internal systems, client assets, or personal photos, where sending the file to a third-party service would be a problem. It also keeps compression instant: processing starts the moment the file is selected and the result is usually ready in under a second.