Start with a high-resolution source image
Use the original file whenever possible
Set the output size to the desired dimensions
Increase resolution only if needed
Use image upscaling software or AI upscalers
Choose the highest quality export settings
Save in a lossless format when possible
Avoid repeated compression and re-saving
Sharpen carefully after resizing
Check the image at 100% zoom for quality
Use proper aspect ratio to prevent distortion
Keep the original file for future edits