Resize Image Online Free
Change image dimensions by width, height, or percentage — preview and download instantly.
Drop an image here
or
Your images never leave your browser
How to Resize an Image
Upload
Drop or select the image you want to resize.
Set dimensions
Enter width/height or a percentage. Keep aspect ratio on if you want proportional scaling.
Download
Preview the result and download your resized file.
Frequently Asked Questions
Can I keep the aspect ratio?
Yes. Leave “Maintain aspect ratio” checked and edit width, height, or percentage — the other values update automatically.
What is the maximum size?
Input files up to about 25 MB are supported. Output dimensions are capped at 10,000 px per side to protect browser memory.
Does resizing upload my photo?
No. Resizing uses the Canvas API in your browser. Your image never leaves your device.
Can I enlarge a small image?
Yes, but enlarging beyond the original resolution can look soft or pixelated. Shrinking usually looks cleaner.
Which format should I download?
JPEG is great for photos, PNG for graphics with sharp edges or transparency needs, and WebP for modern web pages.
What size should I resize an image for Instagram?
Instagram square post: 1080×1080px. Portrait post: 1080×1350px. Story or Reel: 1080×1920px. Enter those numbers into Width/Height above with aspect ratio matched to get a clean fit.
Free Online Image Resizer
Whether you need a profile photo, product thumbnail, banner, or email-friendly attachment, Site95's resize image tool scales your picture with live preview and a single download — no account, no watermark, no upload to a server.
Why resize before you publish
Phone cameras often capture thousands of pixels across. A website may only show a 800px-wide hero. Shipping the full original wastes bandwidth and slows the page. Resizing to the real display size is one of the highest-impact speed fixes you can make — often better than compression alone.
How to use this tool
Upload an image, set width, height, or a percentage, keep aspect ratio if you want, choose an output format, and download. Processing stays in your browser so personal photos and client assets remain private.
Common sizes people need
- Instagram square post: 1080×1080px · Portrait post: 1080×1350px · Story/Reel: 1080×1920px
- LinkedIn post image: roughly 1200×627px
- Product thumbnails for marketplaces
- Email newsletter images under width limits
- Blog featured images matched to a theme
After resizing, use compress image to reduce file size further, or convert formats for WebP. Read how to resize images for social media for platform-oriented tips.