ImageKit.io - Instant multi-platform image optimization
Bulk Resize Photos - Resize large photos in bulk
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GIF Resizer - Create animated GIFs and resize GIFs too big to tweet!
Promo Instant Image Resizer - Automatically optimize images for web & social media (free!)
Bulk Image Resizer by RedKetchup - Resize, convert, or compress multiple images quickly. Compress PNG, JPEG, WEBP, or HEIC images in batch. Convert multiple images to the PNG, JPEG, WEBP, HEIC, GIF, ICO, TIFF, or BMP formats.