Add your file from your device.
01Images toolImage file
Bulk Image Resizer
Resize a batch of images in one pass.
100% FreeBrowser-basedNo watermark
- 1UploadAdd your file from your device.
- 2Choose optionsPick the output settings you need.
- 3ProcessRun the tool in your browser.
Private by designProcessed on your device where possible.
Works on any deviceDesktop, tablet and mobile browsers.
No installationOpen the page and start working.
Always free coreUse the free plan for everyday tasks.
How to use Bulk Image Resizer
Pick the output settings you need.
02Run the tool in your browser.
03Save the finished result.
04Your files stay private
Your work is processed locally in your browser where possible and is never added to a Vootkit upload library.
Learn more about privacyResizing twenty photos one at a time is the kind of task that makes people give up and upload the originals instead — which is how a page ends up carrying 40 MB of images nobody can see the detail in anyway.
What Bulk Image Resizer does
Resizes up to 20 images at once to a maximum width, keeping each image’s aspect ratio, and converts them all to one format.
The width is a ceiling rather than a target: anything already narrower is left alone rather than enlarged, since upscaling only adds softness and file size.
Settings and limits
| Images at once | Up to 20 |
|---|---|
| Max width | 1–12,000 px, default 1600 |
| Format | JPEG (default), PNG, or WebP |
| Quality | 40–100%, default 85% |
| Aspect ratio | Preserved for every image |
| Smaller images | Left at their original size, never enlarged |
| Progress | Reported per file as it works |
Detailed steps
- Add up to 20 images.
- Set Max width. 1600 px suits most websites; 1200 is plenty for email.
- Pick a Format — WebP for a website, JPEG for anything else.
- Set Quality and run it.
Worth knowing
Choose the width from where the images will be displayed, then double it. Something shown in an 800 px column wants 1600 px so it stays sharp on high-density screens — and no more, because every pixel beyond that is download weight nobody sees.
Frequently Asked Questions
Are my images stretched to the same shape?
No. Only the width is capped and each image keeps its own proportions, so a mix of portrait and landscape comes out correctly.
What happens to images already under the max width?
They are converted and compressed but not resized. Enlarging would add size without adding detail.
Why only 20 at a time?
Every image is decoded and re-encoded in your browser using your machine’s memory. Twenty is what completes reliably on ordinary hardware, including phones.
Can I keep the original filenames?
Yes — each output keeps its source name with the new extension, so the set stays recognisable.
Is Bulk Image Resizer free?
Yes. The Vootkit free plan includes 5 tool runs a day. Upgrade to Vootkit Pro for unlimited daily use, an ad-free workspace and saved workflows.
Are my files uploaded?
No. Bulk Image Resizer runs entirely in your browser — your file is processed on your own device and never sent to a server. There is nothing for us to store or delete.
Do I need to install anything?
No. Bulk Image Resizer works in any modern browser on desktop, tablet or phone. Open the page and start.
How often can I use it? Is there a daily limit?
On the free plan you get 5 tool runs a day. When you reach the limit you'll see a prompt to upgrade, and it resets the next day. Vootkit Pro removes the cap entirely for unlimited daily use.
Recently viewed
This tool processes everything locally in your browser. You can disconnect from the internet after the page loads and it will still work.