What is image compression?
Image compression reduces file size by storing image data more efficiently. Lossy compression removes some detail, while lossless compression keeps the original image information but usually saves less space.
Does image compression reduce quality?
It can. Lossy compression may reduce visible quality when pushed too far, while moderate settings often make photos much smaller with little visible change at normal viewing sizes.
What is the difference between lossy and lossless compression?
Lossy compression removes some image information to make a smaller file. Lossless compression keeps the original image data, so quality is preserved, but the file may not shrink as much.
How much can an image be compressed?
The result depends on format, dimensions, detail, noise and transparency. Photos often shrink more than screenshots or graphics with sharp edges and flat color areas.
What is the best image format for compression?
For web use, WebP often gives a good balance of size and compatibility. JPEG remains useful for photos, PNG is better for transparent graphics, and AVIF is worth testing when supported.
How do I compress an image without losing visible quality?
Start with a moderate quality setting, keep enough pixel dimensions for the display size, and compare the result before replacing the original file.
Why is my compressed image still large?
Large pixel dimensions, high detail, noise, transparency, animation or an unsuitable output format can keep the final file large even after compression.
Does compressing an image reduce resolution?
Compression and resolution are separate. Compression changes how image data is stored; resizing changes pixel dimensions. Some tools can do both when you choose size limits.
Should I compress images before uploading them to a website?
Yes, in most cases. Smaller images can improve page weight and loading, as long as the final image still looks clear at the size where users see it.
How can I reduce an image to a specific file size?
Use a target-size compressor and expect an approximate result. Exact byte targets depend on image content, dimensions, format and browser export behavior.