THE URLTO PLAYBOOK / 10 GUIDES
Image compression10-part series
Compare quality, pixels, PNG behavior, backgrounds and file size.
Know the feature scope
Export a new file at the same dimensions in the browser. Compare JPEG/WebP quality and format; PNG quality behaves differently and the output is not always smaller.
Series contents
10 guides- 01
Prepare web images: resize, compress and choose a format
Prepare PNG, JPEG and WebP images for publishing. Distinguish pixel dimensions from file size, choose transparency and quality settings and inspect the exported result before replacing the original.
- 02
Compare JPEG and WebP quality in steps
Read file size alongside visual results when lowering quality. Compare several exports from the same original.
- 03
Distinguish compression from reducing pixel dimensions
Compression exports at the same pixel dimensions. Review resizing first for oversized images.
- 04
Why the quality slider is disabled for PNG
The quality slider is disabled for PNG output. Compare actual size and alternative formats instead of expecting JPEG or WebP quality control.
- 05
Use different compression criteria for photos and text-heavy screens
Inspect natural color and detail in photos, and small text and lines in screenshots. Avoid one setting for every image.
- 06
Handle a compressed export larger than its source
An efficient original can produce a larger re-export. Compression does not guarantee a smaller file.
- 07
Check backgrounds when compressing transparent images
A transparent logo exported to JPEG receives a white background. Compare it on the intended background.
- 08
Manage compression copies from an original
Create new variants from the original when changing quality. Distinguish file roles to avoid repeated lossy recompression.
- 09
Verify savings and quality before publishing compressed files
Check file size and quality together, then review at the final destination. A smaller number alone does not complete the review.
- 10
What to check when an image export looks wrong
Diagnose a larger file, changed transparency, unexpected dimensions or a failed image export. Compare the source with the output and choose settings that fit its purpose.