Bulk Image Resizer
Resize multiple images at once. Free plan includes 5 images per batch — upgrade for up to 20.
1. Upload Images(0/5)
Upgrade for more →Drag & drop images here, or click to browse
JPG, PNG, WebP, GIF — up to 5 files
How to Bulk Resize Images
- 1.Upload multiple images at once (up to 20 files).
- 2.Set the target width and/or height in pixels. Enable "Keep aspect ratio" to avoid distortion.
- 3.Click "Resize All" and download each file individually.
The Problem With Batch Resizing Is Mixed Orientations
Resizing one image is simple. Resizing forty at once introduces a complication that catches people out: your batch almost certainly contains both landscape and portrait photos, and a single target like '800 × 600' cannot be right for both. Applied literally, it would squash every portrait shot.
The solution is to think in terms of a bounding box rather than exact dimensions. With aspect ratio locked, each image is scaled proportionally until it fits inside the box you specify. A landscape photo hits the 800-pixel width limit first; a portrait photo hits the 600-pixel height limit first. Both end up correctly proportioned, and both fit within the same maximum footprint.
This is why 'longest edge' is usually the most useful way to specify a batch resize. Setting a longest edge of 1200 pixels gives you a consistent visual size across a mixed set, without any single image being distorted or unexpectedly larger than the rest.
Batch Targets by Purpose
Sensible longest-edge values for common bulk jobs.
| Purpose | Longest edge | Notes |
|---|---|---|
| Email attachments | 1000–1200 px | Keeps a set of photos well under message limits |
| Website galleries | 1600 px | Sharp on high-density screens without bloat |
| Blog post images | 1200 px | Comfortably wider than most content columns |
| Product listings | 1000–2000 px | Check the platform's own minimum |
| Thumbnails | 400 px | Crop rather than scale if you need uniform shapes |
| Archive copies | 2400 px+ | Large enough to re-export from later |
Work on Copies, Never Originals
The risk with batch operations is that a mistake applies to everything at once. A wrong target size or an accidental upscale across two hundred photos is a bad afternoon if those were your only copies. Always run bulk jobs against duplicates and keep the originals untouched somewhere separate — resizing is not reversible, and no amount of enlarging afterwards will restore detail that was discarded. This is doubly true for photos with any sentimental or commercial value.
Batch or One at a Time?
- ✓Every image is going to the same destination at the same size
- ✓You want consistent dimensions across a gallery or listing
- ✓The images are similar in subject and framing
- ✓You are shrinking a folder of photos for email or upload
- ✕Each image needs its own crop to work compositionally
- ✕The set mixes photographs with logos or screenshots
- ✕Some images need very different treatment from the rest
- ✕A specific image is going somewhere with unusual requirements
A Sensible Order of Operations
When a batch needs several things done to it, sequence matters. Rotate first, so any sideways photos are the right way up before anything measures their width and height — otherwise a portrait image still flagged as landscape will be fitted to the wrong edge.
Resize second, working from the original resolution so the scaling has as much source detail as possible to average from. Compress last, once the images are already at their final dimensions. Compressing before resizing wastes effort: you carefully optimise pixels that are about to be thrown away, and the resize then re-encodes everything anyway, giving you two rounds of loss for no benefit.
Frequently Asked Questions
How many images can I bulk resize at once?
Free users can resize up to 5 images at once. Pro users can resize up to 20 images per batch.
Will all images be resized to the exact same dimensions?
Yes — all uploaded images are resized to the same target dimensions. If you enable 'Keep aspect ratio', each image will be scaled proportionally to fit within the target size.
What file formats does the bulk resizer support?
JPG, PNG, WebP, GIF, HEIC, and BMP are all supported for bulk resizing.
Does bulk resizing affect image quality?
We resize using high-quality Lanczos resampling. If you're scaling down, quality is preserved. You can also adjust the output quality setting before resizing.
Can I download all resized images as a ZIP?
Currently each image can be downloaded individually. ZIP download is coming soon for Pro users.