“How do I make this image bigger without it getting blurry?” might be the most frequently asked Photoshop question. The short answer is: you can’t add detail that doesn’t exist. The longer answer is: you can get surprisingly close with the right technique.

Understanding Resolution

Before resizing anything, understand what you’re working with. Go to Image > Image Size and look at three numbers:

  • Pixel dimensions (width x height in pixels): This is the actual data in your image
  • Resolution (pixels per inch): This only matters for print
  • Document size (inches or cm): The physical print size at the current resolution

For web and screen use, only pixel dimensions matter. Resolution is irrelevant — screens display pixels, not inches.

Sizing Down (Almost Always Safe)

Making images smaller rarely causes quality problems because you’re discarding pixels, not inventing them.

  1. Go to Image > Image Size
  2. Make sure the chain link icon is active (maintains aspect ratio)
  3. Set your desired width or height in pixels
  4. Resample method: Bicubic Sharper (specifically designed for reduction)
  5. Click OK

After resizing down, apply a touch of sharpening. Downsampling softens images slightly. Filter > Sharpen > Unsharp Mask at Amount: 50%, Radius: 0.5px, Threshold: 0 restores crispness.

Sizing Up (Here’s Where It Gets Tricky)

Enlarging an image means Photoshop has to invent pixels that don’t exist. Every upsampling method is essentially an educated guess.

Photoshop’s built-in options:

  • Preserve Details 2.0 (the best built-in option): Uses machine learning to upscale. Handles moderate enlargements (up to 200%) reasonably well.
  • Bicubic Smoother: The traditional upscaling method. Produces softer results than Preserve Details 2.0 but can be useful for images with lots of smooth gradients.

To use Preserve Details 2.0:

  1. Image > Image Size
  2. Set Resample to “Preserve Details 2.0”
  3. Enter your target dimensions
  4. Adjust the Noise Reduction slider — start at 20% and increase if the upscale introduces artifacts

The Smart Approach to Enlargement

Rather than enlarging in one big jump, try stepping up gradually:

  1. Enlarge by 10-15%
  2. Apply subtle sharpening
  3. Repeat until you reach your target size

This produces slightly better results than a single large jump because each small upscale introduces less interpolation error.

For Serious Upscaling: Use Dedicated Tools

If you regularly need to enlarge images by 200% or more, Photoshop’s built-in tools aren’t your best option. Dedicated upscaling tools like Topaz Gigapixel AI or Adobe’s own Super Resolution (available in Camera Raw) use trained neural networks that produce dramatically better results.

In Camera Raw or Lightroom, right-click an image and choose “Enhance” > “Super Resolution.” This doubles the linear dimensions (4x total pixels) with impressive quality.

Common Social Media Sizes

Here are the dimensions I use most often:

  • Instagram feed: 1080 x 1080px (square) or 1080 x 1350px (portrait)
  • Instagram Stories: 1080 x 1920px
  • Facebook: 1200 x 630px
  • Twitter/X: 1600 x 900px
  • Website hero: 1920 x 1080px (minimum)

Always resize to these exact dimensions rather than uploading oversized images and letting the platform compress them. You’ll get better quality because you control the downsampling.

The File Format Factor

Resizing is only half the equation. The export format matters too:

  • JPEG at 80-85% quality for photos on the web. Going higher adds file size without visible improvement.
  • PNG for graphics with transparency or sharp text
  • WebP if your platform supports it — typically 25-35% smaller than JPEG at the same visual quality

Use File > Export > Export As for the most control over format and quality settings.