Bulk Image Resizer - Free & Online
Bulk Image Resizer & Converter
Resize, convert, and optimize multiple JPG, PNG, and WebP images at once. Set your dimensions and download them all in a ZIP file.
1. Upload & Configure
Uploaded Images
Upload images to see them here.
How to Batch Resize Images
- Drag multiple image files (JPG, PNG, WebP) or click to upload them.
- Your images will appear in the "Uploaded Images" panel. You can remove any image by clicking the 'X' button.
- Choose your resizing method: "Pixels" for specific dimensions or "Percentage" for scaling.
- (Optional) Select an output format (like JPG or WebP) and adjust the quality.
- Click the "Resize Images" button to start the batch process.
- The panel will update to show "Resized Previews". Click "Download All as ZIP" to save them.
Frequently Asked Questions
How does "Maintain aspect ratio" work with bulk images?
When this is checked, each image is resized to fit *within* the maximum width and height you specify, without being stretched or distorted. For example, if you set max dimensions of 800x600, a wide landscape image might become 800x450, while a tall portrait image might become 450x600. This ensures no image is distorted.
Will I lose quality when resizing?
Making images smaller (downscaling) generally preserves quality very well. Making images larger (upscaling) will always result in some loss of quality. When converting to JPG or WebP, you can use the "Quality" slider to balance file size and visual quality. Higher quality means a larger file size.
What is the maximum number of files I can upload?
There is no strict limit set by the tool itself. However, performance depends on your computer's memory (RAM) and processor. For best results, we recommend processing images in batches of 50-100 at a time, especially if the files are very large.
Is this resizing process secure?
Yes, 100% secure. This tool uses JavaScript to perform the resizing directly within your web browser. Your images are never uploaded to a server, guaranteeing your privacy and data security.
The Ultimate Time-Saver: A Guide to Our Secure Bulk Image Resizer
Resizing images one by one is a tedious, time-consuming chore, especially when you have a whole gallery to prepare. Our Bulk Image Resizer is designed to eliminate this bottleneck, offering a powerful, fast, and secure solution for web developers, bloggers, social media managers, and anyone who needs to process multiple images efficiently.
Why Batch Processing is a Game-Changer
The ability to resize and convert multiple images at once is essential for a productive workflow. This tool is your go-to solution when you need to:
- Prepare a photo gallery for your website or blog, ensuring all images fit the layout and load quickly.
- Standardize product images for an e-commerce store, creating a uniform and professional look.
- Convert an entire folder of PNGs to optimized JPGs for better web performance.
- Quickly downscale a folder of high-resolution photos for easy sharing or archiving.
By processing all your images with a single set of rules, you not only save immense amounts of time but also ensure a consistent and optimized final result.
Mastering the Controls for Perfect, Consistent Results
Our tool provides two flexible resizing modes. "Percentage" is perfect for quick scaling, like making all images 50% smaller. "Pixels" is for when you have a specific size requirement, such as fitting all images within a 1200px wide blog post.
The most important setting for bulk operations is the **"Maintain aspect ratio"** checkbox. This is the key to preventing distorted, unprofessional-looking images. When enabled, it intelligently resizes each image to fit *within* your specified dimensions without stretching or squashing it. For example, if you set a max size of 1200x800, a wide landscape photo might become 1200x675, while a tall portrait photo becomes 533x800. This feature ensures that every image, regardless of its original orientation, is resized perfectly.
Your Privacy is Our Priority: The No-Upload Promise
The security of your images is non-negotiable. Many online tools require you to upload your entire photo library to their servers, creating a significant privacy risk. Our Bulk Image Resizer is different.
The entire resizing process happens locally on your computer, inside your web browser. Your images are never transmitted over the internet, and are never stored on an external server. Once the resizing is complete, all your optimized images are packaged into a single ZIP file for a convenient, one-click download. This client-side approach guarantees that your photos remain completely private and secure, making it the safest way to batch resize your images online.