How to Resize Multiple Images at Once: Batch Editing Made Easy
Whether it's an online store, a website, or an email newsletter: images often need to be brought to consistent dimensions. Doing this one by one is time-consuming — with 50 product photos it can take hours. With batch image editing, you can process 100+ images in just a few minutes.
When Do I Need Batch Image Editing?
- Online store: Standardize product photos to a uniform size (e.g. 800×800px for square thumbnails)
- Website: Compress and scale images for fast loading times
- Portfolio / Blog: Export many photos at once to web resolution
- Social media: Bring images to platform-specific standards
- Archiving: Reduce large RAW photos and create JPEG copies
- Print: Prepare multiple images to a consistent DPI
Step-by-Step: Resize Multiple Images with KodiniTools
- Open Batch Image Editor
Visit kodinitools.com/bilderseriebearbeiten — works on Windows, Mac, iOS and Android.
- Upload your images
Select any number of images (JPG, PNG, WebP, GIF) — even 100+ files are no problem. Drag & drop supported.
- Define target size
Enter width and/or height in pixels. The "Keep aspect ratio" option prevents distorted images.
- Choose output format (optional)
You can also convert the format at the same time — e.g. convert all JPGs to WebP for better web performance.
- Export
Click "Convert all" — all images are downloaded as a ZIP file.
Recommended Image Sizes by Platform
| Platform / Purpose | Recommended Size | Format |
|---|---|---|
| Website full-width | Max. 1920px wide | WebP |
| Website inline | Max. 800px wide | WebP / JPG |
| Online store product | 800×800px | JPG / WebP |
| Instagram Feed | 1080×1080px | JPG |
| 1000×1500px | JPG | |
| Email newsletter | Max. 600px wide | JPG |
| Print A4 (300 DPI) | 2480×3508px | JPG / TIFF |
Additional Batch Editing Features
Automatic Renaming
File names can be automatically adjusted — e.g. product-001.jpg, product-002.jpg. This saves time when uploading to an online store and improves SEO through descriptive file names.
PDF Export
Combine all images into a multi-page PDF — ideal for portfolios, presentations or print orders.
Format Conversion in One Step
Scale and convert in one pass: e.g. resize 50 PNG images to 800px wide while simultaneously converting to WebP.
Pro tip for online stores: Consistent image sizes not only improve load times but also the visual appearance. Square product photos (1:1) look best across all shop systems.
How Much Time Do I Actually Save?
Resizing one image manually in Photoshop takes about 30–60 seconds. For 100 images that's 50–100 minutes. With KodiniTools batch editing: under 2 minutes — including upload and download.
Resize multiple images at once now — free, in the browser, no installation.
Open Batch Image Editor →