Use a photo editing app with a sharpen or deblur tool
Increase sharpness carefully to avoid noise
Reduce noise before sharpening if needed
Use AI image enhancement tools
Upscale the image with an AI upscaler
Adjust contrast and clarity
Try restoring from the original high-resolution file
Re-scan or re-download the image at higher quality
Retake the photo with better focus and lighting
Use manual editing software like Photoshop or GIMP