Color & design
JPEG, PNG or WebP? Choose an image format for the job
Understand transparency, compression and pixel dimensions, then use a practical check before sharing an image.
ToolRoof Library
Understand the idea. Put it to work.
Color & design
JPEG to PNG: a working copy, not recovered detail
When a PNG copy of a JPEG is useful, and why a larger file does not prove better image quality.
Color & design
JPEG to WebP: compare size without losing what matters
Compare equal-size images and calculate actual file savings instead of relying on a promised compression percentage.
Color & design
PNG to JPEG: choose the background before transparency disappears
Avoid unexpected backgrounds and weak edges when turning transparent PNG artwork into a JPEG.
Color & design
PNG to WebP: check icon edges, not just transparency
Evaluate a WebP copy of PNG artwork without overlooking small lettering or the purpose of transparent margins.
Color & design
WebP to JPEG: solve an upload requirement, not just a filename
Prepare an image for a destination that rejects WebP while separating format, dimensions, size and background requirements.
Color & design
WebP to PNG: prepare a reusable copy without claiming an upgrade
Use PNG when your editing workflow needs it, while checking transparency and dimensions and recognizing what conversion cannot recover.
Color & design
HEX, RGB and HSL: three descriptions of one color
Move a color between design and code while distinguishing conversion from opacity, perceived lightness and contrast.
Color & design
Text contrast: test the color pair and its context
Interpret WCAG text thresholds without treating a passing pair as proof that an entire page is accessible.
Color & design
Print size: how much paper can your image pixels cover?
Connect pixel dimensions with PPI and physical size without assuming a higher resolution setting adds detail.
Color & design
Resize an image without losing the part that matters
Understand the choice between margins, cropping and stretching before fitting a picture into a new shape.
Color & design
Image compression: meet a size budget without losing useful detail
Separate file size from dimensions and judge the actual output, not a quality setting or an impressive saving percentage.
Color & design
Make a simple sketch that communicates on paper
Give the sketch one purpose and check detail at its actual print size.
How we prepare articles
We develop original explanations and examples with automated assistance, then check calculations and factual claims against the cited sources. ToolRoof is an editorial credit, not a claim of expert review or personal advice. We correct verified errors and change update dates only for substantive revisions.
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