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Compress Image

Reduce file size

About the compress

Make an image file smaller by re-encoding it as a JPEG at the quality you choose. Useful before emailing photos, uploading to a site with a size limit, or speeding up a web page. The image is uploaded to our server for compression, and the page shows the original and compressed sizes side by side.

How to use it

  1. Click the upload area or drop an image onto it.
  2. Drag the Quality slider (10–100%, default 80%).
  3. Click Compress Image and compare the original and compressed sizes.
  4. Click Download to save the smaller JPEG.

Questions

Does compressing a JPEG reduce quality?
Yes. JPEG is a lossy format, so every re-encode throws away some detail. Around 70–85% is usually hard to tell apart from the original at normal viewing size; very low settings show blocky artefacts.
Can I compress a PNG with a transparent background?
This tool always outputs JPEG, and JPEG has no transparency, so transparent areas will not survive. For a logo or graphic that needs transparency, resize it smaller instead.
Why did my compressed file get bigger?
If the original was already a heavily compressed JPEG, or a small PNG graphic, re-encoding at a high quality setting can produce a larger file. Lower the quality slider and try again, or keep the original.