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 data security and privacy
ConvertPort is designed with privacy first. When you upload images for conversion, your files are handled securely and are never stored permanently on our servers.
How we protect your uploads
- All transfers use HTTPS/TLS encryption, so your images are encrypted in transit between your browser and our servers.
- Files are uploaded directly to private cloud storage via time-limited presigned URLs that expire after 15 minutes — no public links are ever created.
- Uploaded files and converted results are automatically deleted within 48 hours. Download links expire after 24 hours.
- Only validated image formats (JPG, PNG, WebP, HEIC, AVIF, TIFF, GIF, and SVG) are accepted. File type is verified by MIME type and content inspection, not just the file extension.
- Rate limiting prevents abuse. Security headers including Content Security Policy (CSP) protect against common web attacks.
- We do not sell, share, or use your images for training or any purpose other than completing your conversion request.
Data retention policy
Uploaded source images and converted output files are automatically removed from our systems within 48 hours of upload. Job metadata is purged on the same schedule via database TTL. We do not maintain an archive of your files.
Security frequently asked questions
Does ConvertPort store my images permanently?
No. Your uploaded images and converted files are automatically deleted within 48 hours. We do not keep copies, backups, or archives of your files.
Can other people access my uploaded images?
No. Files are stored in private cloud storage with no public access. Only you can download your converted files using the unique, time-limited download link provided after conversion.
Is my connection encrypted when I upload images?
Yes. All communication with ConvertPort uses HTTPS with TLS encryption. Your images are encrypted in transit and never sent over an unencrypted connection.
Frequently asked questions
Is Resize Image Online free on ConvertPort?
Yes. Resize Image is free on ConvertPort.
Are my images stored on your servers?
Images are uploaded securely and removed within 48 hours.
Can I process multiple images at once?
Yes. Resize up to 5 images per batch with shared settings.