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Image Compressor

Reduce JPG, PNG and WebP file size while keeping good quality.

Your files never leave your device. Everything is processed right here in your browser — nothing is uploaded.

Compression settings
75%

Lower quality gives a smaller file. 70–80% looks the same to most people.

Automatic keeps JPG and WebP as they are and saves PNG as WebP for a much smaller file.

How to use the Image Compressor

  1. Click "Choose images" or drag your JPG, PNG or WebP files into the box. You can add several at once.
  2. Adjust the quality slider if needed — 75% is a good balance of size and sharpness.
  3. Pick an output format, or leave it on Automatic.
  4. Check the new file sizes, then download each image or click "Download all".

How image compression works

Big photos slow down websites, fill up your phone and often get rejected by upload forms that have a size limit — for example government portals, job applications and exam forms that ask for an image "under 100 KB". This tool shrinks your images so they are quick to share and upload, while still looking sharp.

JPG and WebP are "lossy" formats: they save space by throwing away tiny details your eyes barely notice. The quality slider controls how much is removed. Around 70–80% usually cuts the file size by half or more with no visible difference. Go lower if you need a very small file, and check the preview before you download.

PNG files are "lossless", so they cannot be squeezed much without changing format. In automatic mode, PNGs are saved as WebP, which keeps transparent backgrounds and is usually 50–80% smaller. If you need a JPG (for a form that only accepts JPG), choose JPG as the output format — transparent areas become white.

If an image is already well optimised, re-compressing it can make it bigger. When that happens in automatic mode, the tool keeps your original file so you never get a worse result.

Compression happens on your own device using your browser, so your photos stay private and it works even on a slow connection.

Frequently asked questions

Are my images uploaded to a server?

No. Your images are compressed inside your browser on your own device. They are never uploaded, stored or seen by anyone else.

How do I compress an image to under 100 KB or 50 KB?

Lower the quality slider step by step and watch the new size. If it is still too big at around 40–50%, use the Image Resizer first to make the picture smaller in pixels, then compress it again.

Will compressing reduce the image quality?

JPG and WebP compression removes fine detail, but at 70–80% quality the difference is very hard to see. Very low settings can make images look blurry or blocky, so check the preview before downloading.

Why did my PNG become a WebP file?

PNG is a lossless format that barely shrinks on its own. WebP keeps transparency and is usually far smaller. If you need a JPG instead, choose JPG as the output format.

Why is a file marked "already optimised"?

Some images are already compressed as much as possible. Re-saving them would make them bigger, so in automatic mode we keep your original file instead.

Is there a limit on how many images I can compress?

No fixed limit. Very large photos (over about 50 megapixels) may fail on some phones because of browser memory limits.

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