Image Compressor Online Free
Shrink JPG, PNG and WebP images to a smaller file size without leaving your browser.
Images are processed on your device with the browser canvas API and are never uploaded.
How to use this tool
- 1Choose one or more images — JPG, PNG or WebP all work.
- 2Pick a quality level. Around 70 to 80 percent keeps photos looking clean while cutting most of the weight.
- 3Optionally cap the longest side in pixels, which is usually where the biggest savings come from.
- 4Compress, check the saved percentage next to each file, then download the results.
About this tool
Most images are far heavier than the place they end up in needs them to be. A photo straight off a phone is commonly four to eight megabytes at several thousand pixels wide, while the slot it fills on a web page, a job portal or a form upload might be a thousand pixels across. Compression closes that gap in two ways: it lowers the amount of detail stored per pixel, and it optionally reduces the pixel dimensions themselves. The second usually matters more, because halving the width and height removes roughly three quarters of the data before quality is even considered. This compressor redraws each image on an HTML canvas at the size you choose and re-encodes it at your chosen quality, so you see the original size, the new size and the percentage saved for every file before deciding to keep it. It is useful for speeding up a slow website, getting under a strict upload limit on a government or university portal, attaching several photos to an email without bouncing, and trimming product shots before they go into a store listing. Everything happens inside your browser using standard web APIs — the images are never uploaded to a server, which matters when the file is an identity document, a medical scan or an unreleased design. There is no account, no watermark, no queue and no daily cap.
Frequently Asked Questions
Are my images uploaded to a server?
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No. The compression runs entirely in your browser using the canvas API, so the image data never leaves your device and nothing is stored or logged.
Which formats can I compress?
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Any image your browser can open, including JPG, PNG and WebP. You can also convert the output to a different format while compressing — WebP normally produces the smallest file.
Will compressing reduce the image quality?
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JPG and WebP compression is lossy, so some detail is discarded by design. At 70 to 80 percent quality the difference is usually invisible at normal viewing size while the file gets several times smaller. Lower the slider further only if you need to hit a specific size limit.
How do I compress an image to a specific size, like under 200 KB?
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Reduce the maximum width first, then lower the quality slider step by step. The new size is shown next to each file after every run, so you can adjust until it sits under your limit.
Is there a limit on how many images I can compress?
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No imposed limit. You can select several images at once, and the practical ceiling is your device's available memory since everything is processed locally.