Batch Resize Images Online Free
Resize up to 10 images at once — download all as ZIP. 100% browser-based, private.
Resize mode
Images wider than this will be scaled down. Narrower images are kept as-is.
Drop images here or click to upload
Up to 10 files · JPG, PNG, WebP, HEIC · Max 20MB each
What Is Batch Image Resizing?
Batch image resizing means changing the pixel dimensions of multiple images in a single operation — instead of opening and resizing each file one at a time. Whether you're preparing a set of product photos for an e-commerce store, resizing screenshots for documentation, or scaling down photos from a camera roll before uploading to a platform, batch resizing saves hours compared to editing files individually.
This tool processes all your images entirely inside your browser using the HTML5 Canvas API. No images are sent to any server. You upload, resize, and download — everything stays on your device.
How to Batch Resize Images — 3 Simple Steps
- 1
Choose your resize mode and settings
Select Max Width to scale images down to a maximum pixel width, Percentage to reduce all images by a set percentage of their original size, or Exact Size to resize every image to the same fixed dimensions. Use the preset buttons to quickly apply common sizes like 1920px, 50%, or 1080×1080.
- 2
Upload your images
Click the upload area or drag and drop up to 10 images at once. Supported formats: JPG, PNG, WebP, and HEIC (iPhone photos). Each file can be up to {20}MB. HEIC files are automatically converted to JPEG before resizing — no extra steps needed.
- 3
Download all resized images as ZIP
Once all images are processed, click Download All as ZIP. All resized files are bundled into a single ZIP download. You can also download each image individually by clicking the download icon next to each result.
Batch Resize Modes Explained
Max Width
Scales each image down so its width does not exceed the value you enter. The height adjusts automatically to preserve the aspect ratio. Images that are already narrower than the limit are kept at their original size. Best for preparing images for web pages, email, or platforms with a maximum width restriction.
Percentage
Scales all images proportionally by the percentage you choose. At 50%, every image becomes half its original width and height. At 25%, images shrink to a quarter. Useful when you want a consistent relative reduction across a batch — for example, scaling down a set of DSLR exports to 50% for faster web delivery.
Exact Size
Resizes every image to the exact pixel dimensions you specify (width × height). All images in the batch will have identical output dimensions regardless of their original size or aspect ratio. Use this for social media content where a fixed canvas size is required — like 1080×1080 for Instagram or 1280×720 for YouTube thumbnails.
Common Batch Resize Presets
| Preset | Setting | Best for |
|---|---|---|
| Web small | Max width 800px | Blog inline images, email |
| Web large | Max width 1920px | WordPress featured images, hero banners |
| Shopify product | Exact 2048×2048 | Product photos on Shopify storefronts |
| Instagram post | Exact 1080×1080 | Square carousel posts |
| Thumbnail | Exact 300×300 | YouTube thumbnails, blog post cards |
| DSLR scale-down | Percentage 25% | Export batch from 48MP camera |
| Email attachment | Max width 1024px | Photos shared via Gmail, Outlook |
| Social media mix | Max width 1280px | Facebook posts, LinkedIn images, Twitter |
Who Uses Batch Image Resizing?
- →E-commerce sellers — resize 10 product photos to 2048×2048 for Shopify or WooCommerce in one pass instead of editing each image separately in Photoshop.
- →Photographers and agencies — deliver a full shoot at web-optimized sizes without opening each image in editing software. Scale down 48MP raw exports to 1920px max width for client review galleries.
- →Bloggers and content creators — compress all article images to a consistent width before uploading to WordPress, Ghost, or Webflow. Faster page loads, better Core Web Vitals scores.
- →Social media managers — resize a batch of images for a carousel post or content calendar to meet platform requirements in seconds.
- →Developers — resize UI screenshots and design assets to match documentation or README specs without leaving the browser.
Why Batch Resize in Browser Beats Desktop Apps
Traditional batch resize tools — Photoshop actions, GIMP scripts, ImageMagick — require installation, configuration, and often a learning curve. This browser-based resizer works instantly: no install, no sign-up, and no files uploaded to a third-party server.
Processing happens using the browser's native Canvas API, which is fast enough to resize a batch of 10 images in well under a minute on any modern device. The output uses high-quality bicubic-equivalent scaling (imageSmoothingQuality: high), so edges and details are preserved even when scaling down dramatically.
For teams or individuals who resize images regularly but don't want to pay for or maintain desktop software, a browser-based tool is the fastest path from original to resized.
Best Practices for Batch Resizing
- Use Max Width for web images. Platforms like WordPress and Shopify handle responsive image delivery, so you need to supply the largest size you will display — typically 1920px or 2048px.
- Use Percentage for camera exports. Modern smartphone cameras produce 4032×3024 or 8064×6048 images. A 50% reduction brings these to 2016×1512 — still high resolution but half the file count overhead.
- Use Exact Size for social media batches. When you need every image at the same canvas (1080×1080 for Instagram, 1280×720 for YouTube), Exact Size guarantees uniform output.
- Resize then compress for maximum savings. After resizing, run images through the image compressor to reduce file size further without losing visible quality.
- Keep originals. Resizing is destructive — you cannot recover pixels once an image is scaled down. Always keep the originals in a backup folder before batch processing.
Privacy — All Processing Happens Locally
Your images never leave your device. This tool runs entirely in your browser using JavaScript and the HTML5 Canvas API — there is no server, no cloud storage, and no account required. When you close the tab, nothing is retained. This is particularly important when batch processing photos that contain sensitive content, faces, documents, or confidential product imagery.