Compress Image
Reduce image file size by adjusting JPEG quality. See original vs compressed size comparison and download instantly.
🗜️
Click or drag an image here
Output is always JPEG (best compression)
The tool will auto-find the best quality to match your target (±4%).
Your files are never uploaded. All processing happens in your browser.
How to Use
- 1
Upload your image
Click to upload or drag and drop any JPG or PNG image.
- 2
Set target size
Enter your desired file size in KB for automatic quality adjustment.
- 3
Download
Click Compress & Download to save the smaller image.
How It Works
This tool reduces image file size by adjusting JPEG compression quality, showing a side-by-side original-vs-compressed size comparison so you can find the right balance before downloading.
How JPEG quality settings trade size for detail
JPEG compression discards some image detail to reduce file size — the quality slider (10% to 95%) controls how much. Higher quality preserves more detail but yields a larger file; lower quality shrinks the file more aggressively but can introduce visible blockiness or blur, especially in areas with fine detail or text.
Typical results
At around 80% quality, most photos see a 50-80% file size reduction with minimal visible difference from the original — the sweet spot for most everyday use, since JPEG artifacts only become noticeable at much lower quality settings.
Examples
Preparing a photo for email
Compressing an 8MB camera photo at 80% quality often brings it down to under 2MB with no visible quality loss — well within typical email attachment limits.
Optimizing for a website
Compressing product photos to 70-80% quality before uploading to a website meaningfully speeds up page load time, since large uncompressed images are one of the most common causes of slow-loading pages.
Common Use Cases
- Shrinking photos to fit email attachment size limits
- Speeding up website load times by reducing image file sizes before upload
- Reducing storage space used by large photo collections
Tips
- Start around 80% quality as a baseline — it's rarely visually distinguishable from the original for photos, while cutting file size substantially; only go lower if you specifically need maximum size reduction and can tolerate some visible quality loss.
- For images with sharp text or fine line art rather than photos, JPEG compression artifacts are more noticeable — consider keeping such images as PNG instead if quality matters more than file size.
Frequently Asked Questions
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