How to Batch Resize Images Free
Learn how to batch resize hundreds of images at once for free. No software needed — process images in your browser and download as ZIP. Step-by-step guide.
What is Batch Image Resizing?
Batch resizing means applying the same resize operation — dimensions, format, compression quality — to multiple images at once. Instead of opening each image individually and saving with new settings, you bulk-process your entire folder in one operation.
This is essential for: e-commerce sellers updating product catalogues, photographers delivering client galleries, social media managers preparing content for a campaign, and developers prepping assets for a web project.
How to Batch Resize Using Glopix (Free, No Software)
Go to Glopix Batch Processor. Click 'Upload Images' and select all the files you want to resize — you can select hundreds at once. Use Ctrl+A in the file picker to select your entire folder.
Set your target width and height. You can choose to maintain aspect ratio (recommended) or force exact dimensions. Select your output format: JPG for photos, PNG for graphics, WebP for web use. Set the quality slider — 80 is a good default for web use.
Hit 'Process All' and wait for the progress bar. When complete, click 'Download ZIP' to get all resized images in one file.
Batch Resize for Specific Use Cases
E-commerce products: Resize to 1000×1000px, WebP format, quality 85. This hits the zoom-compatible minimum for most stores while keeping file sizes under 100KB.
Blog featured images: Resize to 1200×630px, WebP, quality 80. This is the standard social sharing preview size and works perfectly as a featured image on most themes.
Social media posts: Use platform-specific presets at the relevant platform resizer page to apply the correct dimensions automatically.
Alternatives to Glopix for Batch Resizing
ImageMagick is the gold standard for batch resizing from the command line — it's free and infinitely configurable but requires terminal knowledge. XnConvert is a free desktop app for Windows and Mac that handles large batches well. GIMP Script-Fu can batch process but has a steep learning curve.
For most users without technical background, Glopix is the easiest free browser-based option available in 2026.
Useful Tools for This Guide
Frequently Asked Questions
Can I batch resize images for free without installing software? expand_more
Yes — use Glopix Batch Processor at /imagetools/batch/. It runs entirely in your browser, supports hundreds of images per batch, and exports a ZIP. No software, no signup.
What's the maximum number of images I can batch resize? expand_more
The free tier supports up to 100 images per batch. For larger catalogues, split into multiple batches of 100.
Can I batch resize and convert at the same time? expand_more
Yes — the Glopix Batch Processor lets you set target dimensions AND output format in one operation. Resize to 1000×1000px and convert from JPG to WebP simultaneously.
How do I maintain aspect ratio when batch resizing? expand_more
Enable 'Maintain aspect ratio' in the settings. This resizes so the longer edge matches your target dimension and the shorter edge scales proportionally (no distortion).
Is there a file size limit for batch uploads? expand_more
Individual images up to 10MB each on the free tier. Total batch size should be under 500MB for best performance.