Resize Image
Change image dimensions to any size. Maintain aspect ratio or customize freely.
Drop your Images (JPG, PNG, WebP, GIF) here
or click to browse
How to Resize Images - Step by Step Guide
Upload Image
Select or drag your images to upload
Set Dimensions
Enter new width and height or use presets
Resize
Click resize - images are processed in your browser
Download
Download your resized images instantly
Frequently Asked Questions about Image Resizing
How do I resize an image without losing quality?
What is aspect ratio?
Is this image resizer free?
The complete guide to Image Resizer
Last updated June 1, 2026Resizing an image — changing its pixel dimensions — is one of the most frequent tasks in digital work: preparing a photo for a specific upload slot, generating a thumbnail, standardizing product image dimensions, or reducing a 20 MP camera photo to a web-friendly size. Convertify's Resize Image tool supports pixel-exact dimensions, percentage scaling, and preset sizes, with an aspect-ratio lock to prevent stretching.
Resizing down (reducing dimensions) is lossless quality-wise — you're sampling fewer pixels from a larger image. Resizing up (enlarging) uses interpolation to create new pixels, which softens the image. For significant enlargements (more than 2x), dedicated upscaling tools with AI super-resolution produce sharper results.
How Image Resizer on Convertify compares
| Feature | Convertify | Typical online tool |
|---|---|---|
| Files uploaded | Never | Yes |
| Batch resize | Yes | One at a time |
| Aspect ratio lock | Yes | Yes |
| Preset sizes | Social + standard presets | Custom only |
| Formats | JPG, PNG, WebP, GIF | JPG, PNG |
| Daily limit | Unlimited | Limited |
Step-by-step: how to use Image Resizer
- 1
Upload the image
Drop a JPG, PNG, WebP, or GIF onto the upload zone.
- 2
Set new dimensions
Enter exact pixel width and height, a percentage of the original (e.g. 50%), or pick a common preset (1920×1080, 1200×630, 800×600). Enable 'Lock aspect ratio' to resize proportionally.
- 3
Download the resized image
The resized image downloads in the same format as the input. Use the quality slider to control output file size for JPEG outputs.
Real-world scenarios
Social media image sizing
Different platforms have different optimal image sizes: Twitter headers (1500×500), LinkedIn banners (1584×396), Instagram posts (1080×1080), Facebook covers (820×312). Resize to exact specifications before uploading for the best display quality.
Website hero and product images
Camera photos are often 4000×3000 pixels (12 MP). A web page needs images at 1920×1080 max. Resize before uploading — a 3 MB photo resizes to under 400 KB at web dimensions, dramatically improving page load time.
Government and application portal uploads
Passport photos and ID images for government portals often have strict pixel dimension requirements (e.g., 600×600 pixels, exactly). Resize to the specification before upload to avoid rejection.
Email signature graphics
Company logos in email signatures should be 100-200px wide for Retina screens and under 50 KB. Resize oversized logo files before adding to your email client.
Troubleshooting and edge cases
The image looks stretched or squished.⌄
You resized with a fixed width and height without locking the aspect ratio, and the dimensions don't match the original's proportions. Enable 'Lock aspect ratio' and set only one dimension — the other calculates automatically.
The resized image is blurry.⌄
Upscaling (making a small image bigger) always produces some blur because the tool must interpolate new pixels. The only solution is to start with a higher-resolution source. Downscaling never causes blurriness.
I need to resize a batch of 50 product images.⌄
Upload all images at once. Convertify's batch mode applies the same target dimensions to all images and bundles the results in a ZIP for one-click download.