Compress JPG
Compress JPGs online for quick sharing, fast uploads, and lighter storage with visual quality preserved. The compressor is free, needs no signup, and runs online.
Free
no account needed
Frankfurt
stored in the EU
2 hours
then files are deleted
Your files
Add them here, we do the rest
Drag and drop your files here, or import from:
Upload files up to 100 MB in JPG, JPEG
- JPG
- JPEG
What is JPG compression?
JPG compression applies lossy data reduction based on the Discrete Cosine Transform (DCT), optimized for photographic content with millions of colors.
The encoder converts pixel blocks into frequency coefficients using DCT, then quantizes the high-frequency detail that the human eye is least sensitive to. This achieves significant size reduction with minimal perceptible quality loss.
Chroma subsampling reduces color resolution independently of brightness data, exploiting the eye's lower sensitivity to color detail. This alone can halve file size before any further quantization is applied.
The quality parameter (1–100) controls the quantization table aggressiveness. Higher values retain more detail at larger file sizes; lower values discard more high-frequency data for maximum compression.
Why compress a JPG?
- 01
JPG compression is essential for managing photographic assets across web and mobile platforms where bandwidth and storage are constrained.
- 02
Reducing JPG file size directly improves page load speed, lowering Largest Contentful Paint (LCP) and cumulative layout shift metrics that search engines use for ranking.
- 03
Email attachments and messaging platforms impose strict size limits; compressed JPGs fit within those limits without requiring format changes or multiple uploads.
- 04
Cloud storage costs scale linearly with volume, so compressing photo libraries by 40–70% translates directly to lower hosting and backup bills.
- 05
Social media and e-commerce platforms re-encode uploaded images anyway. Pre-compressing to a controlled quality level ensures you choose the trade-off rather than leaving it to an opaque server-side pipeline.
Frequently asked questions
Still have questions? Contact support.
Will compressing my JPG make it look blurry?
At moderate quality levels (70–85), the difference is virtually imperceptible to the human eye. JPG compression discards high-frequency detail that contributes minimally to perceived quality. Only aggressive compression below 50% produces visible artifacts such as blocking or color banding.
How much smaller will my JPG be?
Typical photographic JPGs compress to 30–60% of their original size at quality 80. Images with large areas of smooth gradients or solid color compress more; highly textured images with fine detail compress less. The exact ratio depends on the source image characteristics.
Can I compress a JPG multiple times?
You can, but each round of lossy compression discards additional detail. The quality loss is cumulative. For best results, always compress from the highest-quality source you have rather than re-compressing an already compressed file.
Does JPG compression remove EXIF data?
Standard JPG compression targets only the image data stream. EXIF metadata, including camera settings, GPS coordinates, and timestamps, is stored in separate headers and remains intact through the compression process.
What is the best quality setting for web images?
For most web use cases, a quality setting of 75–85 provides an excellent balance between visual fidelity and file size. Product photos and hero images may warrant 85–90, while thumbnails and background images can go as low as 60–70 without noticeable degradation.
Why is my compressed JPG larger than the original?
This can happen if the original was already aggressively compressed or if the re-encoding uses a higher quality setting than the source. The tool will notify you when no meaningful reduction is achievable so you can keep the original.