Image Resizer
Resize any image to custom dimensions. Aspect-ratio lock supported.
What is the Image Resizer?
The Image Resizer changes the pixel dimensions of your images so they fit exactly where you need them — a website banner, a passport photo, a social media post or a print layout. You can enter custom width/height values or pick a preset like 1080×1080 for Instagram.
Resizing is one of the most common image tasks. Uploading a 6000-pixel photo to a form that expects 800 pixels is wasteful and often fails silently. The resizer keeps everything you love about the original photo but rescales it to the right size in one click.
Because the tool runs in-browser, images stay on your device. That is essential for identification photos, family pictures and design work under NDA.
How to use the Image Resizer
- 1Upload one or more images (JPG, PNG or WebP).
- 2Enter the target width and/or height in pixels.
- 3Toggle "lock aspect ratio" to avoid stretching the image.
- 4Choose whether to output the same format or a different one.
- 5Click "Resize" and preview the new dimensions.
- 6Download the resized images individually or as a ZIP.
Key features
- Custom width/height in pixels
- Aspect-ratio lock
- Preset sizes for social media and print
- Batch resize
- Choose output format (JPG, PNG, WebP)
- Retains colour profile and sharpness
- Runs 100% offline in the browser
Examples
Instagram square
A 4032×3024 phone photo is resized to 1080×1080 for a feed post.
Passport photo
Crop and resize to 600×600 for a government ID form that requires exactly that size.
Blog thumbnails
Batch resize 20 hero images to a uniform 1200×630 for consistent Open Graph previews.
Why use this tool
- Meets exact upload requirements on portals and forms
- Reduces file size along with dimensions
- Consistent look across a website or portfolio
- Removes wasted pixels that slow page loads
- One-click preset for common social sizes
Common use cases
- Preparing profile pictures for LinkedIn or Twitter
- Sizing photos for passport or visa applications
- Creating uniform thumbnails on an e-commerce store
- Fitting images inside a set print dimension
- Reducing images to email-friendly sizes
- Formatting Open Graph and Twitter card images
Frequently asked questions
Will resizing distort my image?
Only if you turn off "lock aspect ratio" and enter mismatched dimensions.
Can I upscale a small image?
Yes, but upscaling adds no new detail — the image will look softer. For real upscaling, use an AI tool.
Does resizing change the quality?
Downscaling has almost no quality impact. Upscaling degrades quality.
What formats does it output?
JPG, PNG and WebP. You can keep the input format or switch on the fly.
Is there a maximum image size?
The upper limit is what your browser can hold — typically 20,000 pixels wide on desktop and 8,000 on mobile.