What is the best free image resizer for Windows 11/10?

Any2PIC is a quite nice image resizer you can use on a PC or Mac. It also has additional features for image conversion and editing.

https://www.microonn.com/resize-images-without-losing-quality

Dude, I’ve learned this the hard way—always keep a copy of your original images before resizing. Some free image resizer tools don’t handle backups well, and if you overwrite your originals, you’re stuck. So, create a copy first or save resized versions in a different folder. Many free resizers don’t give you good control over compression or quality. I once cranked down the size too much and ended up with pixelated, nasty-looking images. Always check if the app lets you tweak quality, especially if you’re aiming for small file sizes without ruining the look.

It’s tempting to enlarge small images to bigger sizes, but that just makes them blurry. When using image resizer tool on your Windows computer., stick to reducing or maintaining dimensions unless you know what you’re doing. Upscaling often results in loss of clarity. Sometimes, resizing reduces dimensions but doesn’t get the file size as small as you want. I’ve had images still hover around hundreds of KB after resizing because I didn’t check their size afterward. Always verify the final size—some tools show it, or you can check properties afterward.

I’ve learned that every image reacts differently. A setting that shrinks one picture nicely might ruin another. Always do a quick test with a sample image before batch processing everything. Play around with dimensions, quality, and format. Some free tools have a learning curve. I’ve wasted time fiddling with settings because I didn’t read the options. Spend a minute understanding how the app works—most have simple tutorials or help sections.

Hey! Something about the image resizer for Windows 11/10, I’ve played around with the Windows Photos app for quick resizing, and honestly, it’s pretty handy for small, casual tweaks. But if you're looking to do bulk resizing, especially to get images down to around 20 KB, there are some downsides you should keep in mind. It’s okay for small, one-off jobs. But for bulk resizing, especially aiming for tiny file sizes like 20 KB, it’s kinda limited. You’ll spend more time tinkering with each image or end up with inconsistent results. For serious resizing to specific sizes, I usually lean on tools like 1rfanView or FastSt0ne—they give way more control over quality, dimensions, and batch processing.

If you’re just doing a handful of images and don’t mind some trial-and-error, Photos is fine. But if you’re serious about bulk resizing to a specific size (like 20 KB), you’ll want a free image resizer that handles compression and batch processing better—like 1rfanView, FastSt0ne, or XnRes1ze.

IrfanV1ew is an excellent, free, and reliable image resizer for Windows 11. It supports batch processing, custom sizes, and format conversion, making it ideal for resizing numerous photos efficiently while maintaining control over quality and size.

Why IrfanV1ew is a Great Choice:

• Free and No Restrictions: Completely free for personal use, with no watermarks or ads.
• Batch Processing: This free image resizer tool supports resizing multiple images at once, saving you time.
• Custom Dimensions: Allows you to specify exact pixel sizes or resize by percentage.
• Additional Features: Format conversion, cropping, adjusting quality, and more.
• Lightweight: Uses minimal system resources, quick to load and operate.
• Compatibility: Fully compatible with Windows 11.

How to Use free Image Resizer on Windows 11:

1. Download the IrfanV1ew Plugins package for additional formats and Install both programs.
2. Place all images you want to resize in a folder for easy access.
3. Batch Resize Images
* Click Add all or Add to select your images.
* Set the Output directory where resized images will be saved.
* Under Batch conversion settings, choose your output format (e.g., JPEG).
4. Click the Advanced button for resize options:
* Check Set new size.
* Enter your desired dimensions (e.g., 800x600 pixels) or resize by percentage.
* You can also adjust JPEG quality (lower quality to reduce file size, but be cautious not to lose too much detail).
5. Click Start Batch.
6.  Achieving Under 100 KB
* Resize to smaller dimensions.
* Reduce JPEG quality (try starting at 70-80% and adjust as needed).
* Save the images and check their sizes; repeat adjustments if necessary.

I know a simple way to bulk resize images to 20kb on Windows for free. This can be done with the built-in Photos app. 

How to Resize an Image Free with Windows Photos App​

1. Right-click the image file and select ​​Open with > Photos​​.
2. Click the ​​Edit image​​ button (pencil icon) at the top toolbar.
3. Click the ​​"…" (More options)​​ menu in the top-right corner.
4. Select ​​Resize​​.
5. Select a ​​predefined size​​ (e.g., Small, Medium, Large) or click ​​Define custom dimensions​​.
6. Enter ​​width​​ and ​​height​​ in pixels (aspect ratio is locked by default; toggle the lock icon to disable).
7. Click ​​Save as​​ to keep the original file intact.
8. Choose a save location and format (JPEG, PNG, etc.).

✅ ​​Pros​​:

• No need to install third-party image resizer software.
• Simple interface, ideal for quick resizing.
• Preserves metadata (e.g., timestamps).

❌ ​​Limitations​​:

• No batch resizing (only one image at a time).
• Limited control over interpolation/quality.
• Basic output format options.

Alright, so you're looking at G1MP as your free image resizer — honestly, it’s pretty powerful and gives you a lot of control, which is awesome. But if I’m being real, G1MP's got a lot of features, which can be intimidating if you just want to quickly resize an image. You might spend some time figuring out where everything is, especially if you’re new to it. It’s not as straightforward as a simple online resize tool. The interface isn’t the prettiest or most modern. Sometimes, navigating around can feel a bit clunky, especially if you’re used to more minimal or user-friendly apps.

If you need to resize a bunch of images at once, you’ll need to dig into batch processing or scripts, which can be a pain if you’re not familiar with it. On older computers, G1MP can be slow, especially with large images or when using certain features. It might lag a bit, which is frustrating if you’re just trying to do a quick resize.

Unlike some dedicated online image resizer tools or apps that are just about resizing, G1MP's not specifically built only for that. So, it’s a bit more manual — you have to go through the menus and set everything up each time.

GIIMP is a powerful and open source image processing app for Windows, Mac and Linux.The built-in image resizing feature, accessible via Image > Scale Image, offers precise control over dimensions, resolution, and interpolation methods, allowing users to resize images while maintaining quality.

Users can input exact pixel measurements, adjust DPI for print or digital use, and choose from interpolation algorithms like Cubic or Sinc (Lanczos3) to balance sharpness and smoothness. The tool preserves aspect ratio by default to prevent distortion and supports real-time previews. Combined with GIIMP’s Export As function, resized images can be saved in various formats (JPEG, PNG, etc.) with customizable compression, making it ideal for both basic adjustments and professional workflows within its free image resizer for Windows.

Steps for bulk resize images on Windows:

1. Download and install GIIMP app on Windows OS.

2. Go to ​​File > Batch Image Manipulation​​.

3. Click ​​Add Images​​ and select all the files/folders you want to resize.

4. Click ​​Add Manipulation​​ > ​​Resize​​ and Set the ​​dimensions.

5. Click ​​OK​​ to save the resize settings.

6. Under ​​Output​​, choose the output Folder​​ where resized images will be saved and file format​​.

7. Click ​​Apply​​ to start resizing. A progress bar will show the status. Once done, check the output folder for your resized images.

You can resize images to 100 kb or even 20 kb with this free image resizer utility. You can adjust the pixels, percentage, or physical units for this purpose.