How can I resize multiple images at once?
Select multiple pictures or drag and drop an entire folder. Configure your target widths or heights and process the whole batch in one click.
Images
Image Resizer
FreeLocal processingv1.0.0
Resize multiple images to custom dimensions while preserving aspect ratio. Choose JPG or PNG and download a neatly organized ZIP with originals and versions.
About this app
Prepare your images for websites, forms, and social media in three simple steps: add your files, set target dimensions, and choose the output format.
Select multiple images from your device, drag and drop a batch, or click Paste images when supported by your browser. Works with WebP, HEIC, JPG, PNG, and GIF. Animated GIFs and multi-shot HEIC sequences will generate clean static frames.
Generate up to 12 sizes at once. Specify maximum width only, maximum height only, or both: the app preserves proportions and never stretches smaller images. For example, a 1200 × 800 image with 512 max width becomes 512 × 341 pixels.
Choose JPG with fine quality control or PNG with full 24-bit colors and transparency, or compact 8-bit palette (up to 256 colors). In JPG, transparent areas receive a clean white background.
Track progress with per-file status, dimensions, and real-time counter. Once done, download a ZIP file with dedicated folders for each image, including intact original copies and clearly labeled versions.
All processing takes place entirely in your browser. No files or photos are uploaded to any server. Supports up to 50 images and 100 MB per batch, up to 40 megapixels per image.
Features
Create multiple sizes from the same image
Define up to 12 different size targets (e.g. thumbnail, medium, full-size) and generate all versions simultaneously.
Downscale width and height without distortion
Specify maximum width, maximum height, or both. The aspect ratio is strictly preserved, and smaller images are never stretched.
Resize HEIC, WebP, JPG, PNG, and GIF photos
Supports standard formats as well as modern iPhone HEIC and WebP files directly in your browser.
Save images in JPG with adjustable quality
Dial in your preferred JPEG compression quality from 10% to 100% to balance file size and visual sharpness.
Convert images to 8-bit or 24-bit PNG
Choose 24-bit for rich colors and transparency, or 8-bit indexed palette (up to 256 colors) for ultra-light graphics.
Download resized images in a neatly organized ZIP
Get a clean ZIP file containing separate folders for each picture, with intact original files and clearly labeled resized versions.
Frequently asked questions
Are images uploaded to any server?
No. All resizing and encoding happen inside your browser using the HTML5 Canvas API and WebAssembly.
Does 8-bit PNG preserve all colors?
8-bit PNG uses a color palette of up to 256 colors, ideal for illustrations and icons, while 24-bit PNG preserves millions of colors for photos.
What happens to animated GIFs and HEIC photos?
Animated GIFs and multi-frame HEIC sequences will generate clean static frames for each target size.
Can I paste multiple images on mobile devices?
The paste button works when your browser allows clipboard access. On mobile, using Select from device is typically recommended.
What are the batch processing limits?
Up to 50 images and 100 MB per batch, with up to 40 megapixels per individual photo.
Are original files and metadata preserved?
Yes. The ZIP contains an untouched copy of each original file (with _original in the name) including full EXIF metadata.
Questions
No published answers yet.
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