Bigjpg

Bigjpg uses deep convolutional neural networks to upscale images without losing quality. It intelligently reduces noise and serration, making it particularly effective for anime images and illustrations. Users can upload images up to 3,000x3,000 pixels with a file size limit of 5MB for free accounts, while paid accounts can upload up to 50MB. The service also provides a faster and more stable experience for paid users and offers offline enlarging capabilities once logged in. Users can manage history and settings after logging in, and their uploaded images are automatically deleted after three days to ensure privacy.