ResizePack
Batch resize images by pixel dimensions or percentage. Social media presets included. Download all as ZIP.
Drop images to resize
JPG, PNG, WebP — batch resize with social presets
Free: up to 100 files · Pro: 500
Why use SammaPix to resize images?
Browser-based — 100% private
All resizing happens in your browser using the Canvas API. Your images are never uploaded to any server.
Social media presets
One-click presets for Instagram Post, Story, Twitter/X, LinkedIn, YouTube Thumbnail and A4 print at 300 dpi.
Batch ZIP download
Resize hundreds of images at once and download all results in a single ZIP archive. Files are renamed with their new dimensions.
What is ResizePack?
ResizePack is a free browser-based batch image resizer. Resize multiple JPG, PNG, and WebP images at once — by exact pixel dimensions, percentage, or using built-in social media presets for Instagram, Twitter/X, LinkedIn, and YouTube. Download all resized images in a single ZIP archive.
ResizePack includes 6 social media presets and supports cover and contain fit modes for precise cropping. All resizing runs in the browser using the Canvas API — no files are uploaded to any server.
How batch image resizing works
SammaPix resizes images using the browser's native Canvas API — no server involved. Drop your images, choose pixel dimensions or a percentage scale, optionally lock the aspect ratio, and hit resize. All images are processed concurrently in your browser.
When you lock the aspect ratio, each file is resized independently based on its own original dimensions, so portrait and landscape shots both come out proportional.
When should you resize images?
- —Before uploading to Instagram, Twitter/X or LinkedIn to meet platform requirements
- —Before adding to a website or CMS to improve page load speed
- —To generate thumbnails from high-resolution source images
- —To prepare photos for print at exact DPI targets (e.g. A4 at 300 dpi)