JPEG compression is a visual trade-off
JPG is already a lossy format. This page accepts only JPG/JPEG and re-encodes it with Quality (88%), Smart (78%), or Extreme (55%) browser encoder settings. Repeatedly compressing the same photo can compound artifacts, so start from the best available source.
A practical check
- Add one JPG or JPEG.
- Try Smart first, then compare faces, texture, gradients, and text.
- Download only when the visible result suits its final display size.
When it helps
Reduce camera photos for email, web pages, application forms, or messaging. For a large phone photo, resizing dimensions before JPEG compression can save more than lowering quality alone.
Limits and troubleshooting
The page handles one browser-decodable JPG at a time and has no explicit byte cap; available memory limits very large dimensions. If no saving is reported, the source may already be efficiently encoded. Compare another preset or use the broader Image Compressor when the source format is uncertain.
JPG compression questions
What changes when a JPG is compressed?
The pixels are decoded and encoded as JPEG again. Lower-quality presets discard more detail and can introduce blocks, ringing, or softness around fine edges.
Will the image dimensions change?
No. This compressor keeps the decoded width and height. Use Image Resizer when reducing pixel dimensions is also appropriate.
Why was my original JPG returned?
FiloTool compares the encoded result with the source. If the new JPG is not smaller, it returns the original file instead of claiming a reduction.
Is JPG suitable for logos or screenshots?
It can be, but sharp text and flat-colour edges often show JPEG artifacts. PNG or WebP may be more appropriate for those images.
Are photos uploaded?
No. The active JPG workflow runs through browser image and Canvas APIs locally.