Quality 90% (excellent)
- Input
- 4,2 MB JPEG original (12 MP)
- Expected output
- ~1,1 MB
Imperceptible difference in most photographs. Ideal for archiving.
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compress JPG online
JPEG is the dominant format for digital photographs because it uses DCT (Discrete Cosine Transform) compression, a technique that discards color information imperceptible to the human eye. At 75–90% quality, the size reduction is significant and the visual difference is practically nonexistent. This tool processes the file entirely in the browser: no pixel is transmitted.
Imperceptible difference in most photographs. Ideal for archiving.
Industry standard for web. Excellent quality/size balance.
Visible artifacts in gradients. Suitable for thumbnails and low-resolution previews.
It depends on the compression level and format. Lossy formats like JPEG and WebP discard color information imperceptible to the human eye. At 75–90% quality, the difference is rarely visible, but aggressive compression below 60% introduces visible artifacts, especially on edges and gradient areas.
80–85% is the sweet spot for most photographs: significant size reduction with barely perceptible visual difference. For high-fidelity archiving, use 90%. For social media and thumbnails, 70–75% is acceptable.
If the original was saved at very low quality, re-encoding it at high quality can produce a larger file. Use quality equal to or lower than the original. Also check that the original file does not have a .jpg extension but is actually another format.
Presets
Your browser cannot encode AVIF. Use WebP. It is widely supported and saves about as much.
Images are processed entirely in your browser. No file is sent to any server.