How to Sharpen Photos for Web vs Print

Here’s a mistake I see constantly: photographers apply one round of sharpening and export for both web and print. The result? Images that look crunchy on screen and soft in print. Web and print have different requirements, and your sharpening needs to account for that.

Why They’re Different

A computer monitor displays images at roughly 72-150 PPI, and every pixel is visible. What you see is what you get. Any over-sharpening shows up immediately as halos and artifacts.

A print spreads ink or dye on paper, and the physical process softens the image slightly. Dot gain, paper absorption, and viewing distance all reduce perceived sharpness. You need to compensate for that by sharpening more aggressively than looks right on screen.

Sharpening for Web

Web images are small (typically 1000-2500 pixels wide) and viewed at 100% zoom on screens. Subtlety is everything.

My web sharpening recipe:

1. Resize the image to final web dimensions first — always sharpen after resizing
2. Use Filter > Sharpen > Unsharp Mask with these starting values:
   • Amount: 60-80%
   • Radius: 0.5-0.8 pixels
   • Threshold: 0-1
3. View at 100% (Ctrl/Cmd + 1) while adjusting

The low radius is key for web. High radius values create visible halos that look terrible on screen. You want tight, subtle edge enhancement.

Alternative: Smart Sharpen offers more control with its Reduce Noise slider, which helps prevent sharpening noise in smooth areas like sky or skin. I prefer it over Unsharp Mask for most web work.

Amount: 80-100%, Radius: 0.5px, Reduce Noise: 10-20%

Sharpening for Print

Print images are larger (3000+ pixels), printed at 240-360 PPI, and viewed from a distance. You can and should sharpen more aggressively.

My print sharpening recipe:

1. Keep the image at full resolution — don’t resize for print
2. Apply Unsharp Mask:
   • Amount: 100-150%
   • Radius: 1.0-2.0 pixels
   • Threshold: 2-4
3. Evaluate on screen knowing it will look slightly over-sharpened — that’s normal

The higher radius accounts for the physical softening that occurs during printing. The higher threshold protects smooth tones from noise amplification, which matters more in large prints.

Paper type affects sharpening. Glossy paper holds detail well and needs less aggressive sharpening. Matte and fine art papers absorb more ink and benefit from slightly more sharpening. If you’re printing on canvas, push it even further.

The Two-Pass Method

Professional retouchers often sharpen in two stages:

Pass 1: Capture sharpening — Applied early in editing to compensate for the inherent softness in digital capture. Subtle, low-radius sharpening applied to the full-resolution file.

Pass 2: Output sharpening — Applied last, after all editing and resizing, tuned specifically for the output medium (web or print).

This two-stage approach gives you a clean editing workflow with sharpening optimized for each destination.

Selective Sharpening

Not every part of your image needs the same sharpening. Portraits especially benefit from selective sharpening — you want sharp eyes and hair but smooth skin.

1. Apply sharpening to a Smart Object (so it becomes a Smart Filter)
2. Click the Smart Filter mask
3. Paint black over areas where you want less sharpening (skin, out-of-focus background)

This prevents sharpening from emphasizing skin texture and pores, which is almost never what you want.

Quick Reference

These are starting points, not absolutes. Every image is different. But they’ll get you in the right ballpark without the trial-and-error most people go through.

Sharpen last, sharpen for your medium, and always view at 100% when evaluating. Those three rules will handle most situations.