Light Image Resizer - Batch Image Tool
Light Image Resizer is an image batch processing tool by ObviousIdea that resizes, converts, and watermarks large numbers of photos at once. A lifetime license costs $24.99. The free version works but is limited to 100 images and shows reminder popups.
It runs on Windows only and supports over 30 image formats including RAW files from Canon, Nikon, and Sony cameras.
Batch resizing and conversion
Select a folder of images, set your target resolution (pixels or percentage), and the tool processes everything in one pass. You can convert between formats at the same time - JPEG, PNG, WebP, HEIC, AVIF, and others. There is a quality slider for controlling compression. A live preview shows what the output will look like before you commit to processing.
Watermarks and extras
The watermark feature overlays text on every image in a batch, with adjustable transparency and positioning. You can also combine images into a PDF document. A basic editor lets you add text, shapes, and blur effects to individual images.
Advantages
- Batch processes hundreds of images quickly with multi core support
- Handles RAW camera formats without extra plugins
- One time purchase, no subscription
- Live preview before processing
Drawbacks
- Free version limited to 100 images with nag popups
- IrfanView does batch resizing for free with its batch conversion dialog
- ImageMagick is free and more powerful for command line batch processing
Who it is for
Light Image Resizer works well for photographers who regularly need to resize batches of images for web use or email. If you only resize photos occasionally, IrfanView's batch dialog or even the built in Photos app in Windows can handle it. For heavy automation, ImageMagick's command line approach is more flexible.
Frequently Asked Questions
Is Light Image Resizer free?
Does Light Image Resizer support RAW files?
What are free alternatives to Light Image Resizer?
Features & How-To Guide
| # | Feature | How to use |
|---|---|---|
| 1 | Adding watermark to photos | Advanced tab › Watermark › Check Text Watermark › Enter text › Set font/size/color › Opacity slider (30-50% typical) › Position (center/corner) › Apply to batch. |
| 2 | Photo format conversion | After adding photos › Advanced tab › Output format › Choose from list: JPEG/PNG/WebP/HEIC/AVIF/BMP/TIFF › Set quality (JPEG Quality slider 1-100) › Resize/Move. |
| 3 | Photo compression with quality control | Advanced tab › Output format: JPEG › Quality slider: lower = smaller file › Preview file size in the Preview panel › Compare original with result before processing. |
| 4 | Opening and processing RAW files | File › Add Files › Filter "All supported" › Select .cr2 (Canon) / .nef (Nikon) / .arw (Sony) / .dng files › The program decodes RAW and processes them like regular photos. |
| 5 | Result preview before processing | After setting parameters › Preview panel on the right › Shows how the result will look (size/quality/watermark) › Click Before/After comparison. |
| 6 | Batch photo resize 2 | Drag photos/folder into the program window › Profiles: select a preset size (e.g. 1920x1080/800x600/Custom) › Or enter a custom resolution in pixels or percent › Resize/Move. |
| 7 | PDF creation from photos | Add photos › Advanced tab › Output format: PDF › Set layout (one image per page / multiple per page) › Drag photos in the list to reorder › Process. |
| 8 | Batch file rename 4 | Advanced tab › Rename › Pattern: e.g. "vacation_##" (## = sequential number) › Or "{date}_{original}" › Files are renumbered automatically during processing. |
| 9 | Resize from Windows context menu | Right-click photos in Explorer › "Resize images with Light Image Resizer" › Opens the program with the selected files already loaded. |
| 10 | Photo compression for email | Profiles › Select "Email" › Automatically resizes photos to 1024x768 and compresses JPEG to ~200 KB › Ready to send by email. |
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