How to Resize Image Online
Upload
Upload images to resize in their original format.
Adjust
Choose resize mode: width only, height only, both dimensions, or percentage scale.
Download
Download resized images.
Free image optimization
Resize Image Online
Resize photos to exact pixel dimensions or a percentage of the original size while keeping the same output format.
Width & heightAspect ratio preservedUp to 5 images
Drag & drop images hereSelect images
or click to browse.
JPG, PNG, WebP, AVIF, TIFF, or GIF. Up to 10MB per image. Max 5 images.
JPG, PNG, WebP, AVIF, TIFF, or GIF. Up to 10MB per image. Max 5 images.
Resize images when you need exact pixel dimensions for social templates, thumbnails, product catalogs, or platform upload limits — without switching formats.
Common resize scenarios
- Create 1200 px wide blog hero images
- Generate 400 px thumbnails from originals
- Scale assets to 50% for retina variants
- Fit photos under a pixel height limit
Resize best practices
Downscaling usually looks sharp. Upscaling cannot add real detail — start from the largest source available. When both width and height are set, ConvertPort fits inside the box and preserves aspect ratio.
Your images stay on your device
Your browser opens, processes, and prepares your images for download.
How local processing works
- Image files are read from your device.
- Conversion happens in your browser.
- Converted files are available to download from the current tab.
- No account is required.
- You choose where to save the results.
- Your original files stay as they are.
Saving your files
Download the converted images before closing the tab. ConvertPort does not keep a copy for you to retrieve later.
Image privacy FAQ
Does ConvertPort upload my photos?
No. Image processing takes place on your device.
Does converting replace the original?
No. The download is a separate file.
Can I share a download link for the result?
Save the file to your device first, then share the file through the app of your choice.
Frequently asked questions
Is Resize Image Online free on ConvertPort?
Yes. Resize Image is free on ConvertPort.
Are my images stored on your servers?
No. Your browser processes the images on your device and prepares the results for download.
Can I process multiple images at once?
Yes. Resize up to 5 images per batch with shared settings.