The useful part
Before you start
Use a copy of the original image and decide where the final artwork will be used. For this walkthrough, work with an RGB image and keep a layered file so the effect can be adjusted without destroying the source.
A practical guide
How to make a halftone effect in Photoshop
Photoshop gives you control over the source image, contrast, and screen settings. This guide keeps the workflow concrete, explains what each setting changes, and then shows when a browser tool is enough.
The useful part
Create the effect
Convert the image to a readable grayscale or control its color channels first. Increase contrast until the subject still reads at the intended size, then apply the halftone filter and inspect the smallest details at 100 percent. A setting that looks crisp when zoomed out can turn muddy in a poster or thumbnail.
The useful part
Try a browser-based alternative
If you want a quick, local, no-signup result, the HalftoneDots generator offers live dot size, spacing, angle, contrast, color, transparent backgrounds, PNG, and SVG export. It is designed for visual effects rather than print-preflight work.
Made for seeing the difference
Look at the dots. Then decide.
Every page on HalftoneDots pairs a clear explanation with something you can inspect, download, or make yourself.