Resizing 50 product photos one at a time takes hours. Doing it all at once takes under 2 minutes — and you don't need Photoshop, software, or a subscription. This guide shows you exactly how.
E-commerce
Product images need consistent dimensions — 1200×1200 for Shopify, 2000×2000 for Amazon. Doing this manually across 300 SKUs isn't viable.
Social media
Instagram, LinkedIn, and Pinterest all have different optimal dimensions. Resize your entire content batch in one go.
Photography
Client delivery, stock submissions, and print labs all specify dimensions. Resize all 500 photos at once, not one at a time.
Glopix's free Batch Resize tool handles unlimited images in a single upload. Here's the complete workflow, step by step.
Go to glopix.app/imagetools/batch/. No account needed, no signup form — the tool opens immediately. It works in Chrome, Firefox, Safari, and Edge.
Drag and drop your images directly into the upload area, or click to open your file browser. You can upload as many images as you need in a single session — there's no file count limit.
Supported formats
You can mix formats in a single upload — JPGs and HEICs together, for example. Glopix handles each one correctly.
Glopix offers four ways to set dimensions. Pick the one that matches what you need:
Fixed Width
Set a target pixel width. Height is calculated automatically to preserve aspect ratio. Best for: blog images, web content where width is constrained.
Example: resize all images to 1200px wide.
Fixed Height
Set a target pixel height. Width is calculated automatically. Best for: images in a row or gallery with consistent height.
Exact Dimensions
Set both width and height. Images are cropped or letterboxed to fit exactly. Best for: e-commerce (1200×1200), social media thumbnails.
Example: resize all product images to exactly 800×800px.
Longest Edge
Constrains the longest dimension — works for both landscape and portrait images in the same batch. Best for: photography client delivery.
Example: resize so no image is larger than 3000px on its longest side.
Click Resize All. Glopix processes every image in parallel — 50 images takes roughly the same time as one. When done, click Download ZIP to save all your resized images in a single archive file.
Most e-commerce platforms require images at a specific square ratio. Shopify recommends 2048×2048. Amazon requires images at 2000×2000 or larger on the main image. Upload all your product photos, select Exact Dimensions, enter 2000×2000, and download the full set cropped to square.
Batch resize product photos →When a print lab specifies 300 DPI at 5000px, or a client requests web-ready images at 1500px on the long edge, use Longest Edge mode. Every image — regardless of whether it's landscape or portrait — will be correctly scaled without you having to check each one.
Resize your shoot →Oversized images slow pages down and hurt Core Web Vitals scores. If your blog or website has accumulated images wider than necessary, batch resize them all to 1200px wide. Combined with compression (Glopix can do both in sequence), you can cut page weight significantly.
Also compress images →Creating a content batch across multiple platforms? Use Glopix's Social Media Presets to resize images to exact platform dimensions — Instagram square (1080×1080), LinkedIn banner (1584×396), Twitter post (1200×675), and 80+ more — all from one upload.
Use social media presets →For completeness, here are the alternatives and when they make sense.
Photoshop has a built-in batch resize via File → Scripts → Image Processor. It works well but requires a $20+/month Creative Cloud subscription, a desktop install, and a few steps to set up correctly. If you already have Photoshop for other work, it's a viable option. Otherwise, there's no reason to pay for it just for batch resizing.
On a Mac, you can open multiple images in Preview, select all, and use Tools → Adjust Size to resize the batch. It works for basic needs but only saves back to the original format, doesn't rename files, and can overwrite originals if you're not careful. Also macOS-only.
IrfanView is a free Windows desktop app with excellent batch processing. For offline workflows where you're processing thousands of images regularly, it's fast and capable. It requires installation and is Windows-only, but it's a solid tool for heavy-volume local batch work.
ImageMagick is the most powerful option for developers. A single command can batch resize thousands of images with precise control. This is overkill for anyone who isn't comfortable in a terminal. For non-technical users, Glopix covers 95% of cases with no learning curve.
Try It Now
Free, no signup, unlimited images. Upload your batch, set your dimensions, download the ZIP. That's it.
Use Glopix's free Batch Resize tool at glopix.app/imagetools/batch/. Upload all your images at once, set your target width or height, and download a ZIP of all resized images. No signup, no software installation, no file count limit.
Yes. Online tools like Glopix's Batch Resize handle the same task entirely in your browser — upload your images, set dimensions, download the results as a ZIP. No Photoshop, no software, no cost.
Glopix's Batch Resize supports JPG, PNG, WebP, HEIC, TIFF, and many other formats. You can even mix formats in a single batch — upload a mix of JPGs and HEICs and resize them all at once.
Use Glopix's exact dimensions mode — enter a fixed width and height (e.g. 1200×1200), upload all your photos, and every image will be resized to exactly those dimensions. Use the crop option to fill the canvas without stretching.
Yes, when using reputable tools. Glopix processes images in your browser and never stores uploaded files on any server. Your images stay private and are never retained after your session ends.