One top choice is Remini. It can convert low-res photos and videos into high-res versions with face-smoothing, noise reduction and background detail boosting. Remini can increase photo and video resolution up to 2x without sacrificing quality, making it good for social media, preserving history, print services and e-commerce.
Another good choice is Let's Enhance. This AI-powered image upscaling tool can increase low-res images to 4K and beyond and apply HDR filters for color grading and background removal. It's geared for creative pros who want to quickly increase and improve images for printing, e-commerce and real estate.
For something more flexible, check out VanceAI. The service offers a range of tools to upscale, sharpen, denoise and restore photos, as well as convert them into cartoon or sketch styles. VanceAI can process photos in batches and is good for pros, marketers and businesspeople who have a lot of photos to process.