Image Compressor
? Frequently Asked Questions
How much can images be compressed?
Typical compression achieves 50-80% file size reduction with minimal visible quality loss. Results depend on the image: photographs compress more than graphics, and higher quality settings produce larger files.
What's the difference between lossy and lossless compression?
Lossless preserves perfect quality but offers less compression (5-20% reduction). Lossy discards some data for much greater compression (50-90%) with slight quality degradation. Choose based on quality vs size needs.
Does compression affect image dimensions?
No, compression only reduces file size, not pixel dimensions. To reduce both size and dimensions, resize the image first, then compress the smaller version for maximum file size reduction.
What compression level should I use?
For web use, 80-85% quality offers great balance (significant size reduction, imperceptible quality loss). High-quality prints need 90-95%. Thumbnails can use 70-75%. Test to find acceptable quality for your use case.
Can I compress images without losing quality?
True lossless compression (PNG optimization, JPG metadata removal) offers modest savings (10-20%). For significant compression (50%+), some quality loss is unavoidable, though often imperceptible at proper quality settings.
Is my data safe and secure?
Yes, absolutely! This tool runs entirely in your browser. All data processing happens locally on your device - nothing is uploaded to our servers. Your files and data never leave your computer, ensuring complete privacy and security.