Pixels and file size are different
A 4000×3000 image contains about 12 million pixels, while storage size also depends on format and compression. Halving both dimensions reduces total pixels to about one quarter.
Uploading 4000 px when a page displays only 1200 px often adds transfer time with little visible benefit.
Preserve, fit, or crop the aspect ratio
Preserving aspect ratio adjusts the other dimension automatically and prevents stretching. Fitting the whole image inside a target box can leave empty space.
Fill-and-crop removes empty space but may cut edges. Check faces, document text, and other important areas in the preview.
Choose JPG, PNG, or WebP
JPG or WebP is usually efficient for photographs. PNG is suitable for transparency and crisp graphics or text, but can be large for photos.
Check the destination's accepted formats. Use JPG or PNG when an older system does not support WebP.
- Photos: JPG or WebP
- Transparency and graphics: PNG
- Destination compatibility comes first
Avoid repeated aggressive compression
Resize to the target pixels first, then lower quality gradually while checking text, faces, edges, and color banding. Repeated lossy saves can accumulate damage.
Keep the original and save results under a new name. Baro Tool processes supported image operations in the browser, but backups are still prudent.