Need a photo at exactly 800×600 pixels for a blog, a 400×400 avatar for a profile, or a lighter 50%-scale version for email? The NexToolz Image Resizer does it in seconds: upload any image, type the exact pixel dimensions or pick a percentage, and download the resized copy — no software, no signup.
Two modes cover every use case. Pixel mode lets you enter a precise width and height, with an optional aspect-ratio lock so your photo never stretches or squashes. Percentage mode scales the whole image up or down from 10% to 200% with one slider, perfect for quick batch-style shrinking before sharing.
Resizing happens entirely in your browser with the canvas API, so your pictures are never uploaded anywhere. The tool keeps your original format whenever possible (JPG stays JPG, WebP stays WebP) and falls back to PNG for anything unusual. One tip: shrinking a large photo keeps it sharp, but enlarging far beyond its natural size can look soft — the live output readout always shows you the exact dimensions you will get.
How to use
Upload your image
Drag & drop a photo onto the box, or click it to browse your files. The width and height fields fill in automatically.
Choose pixels or percent
Enter exact dimensions in pixel mode (keep the aspect-ratio lock on to avoid distortion), or drag the percentage slider.
Check the output size
The live readout shows the exact dimensions you will get before you commit.
Resize and download
Press the button, preview the resized image, then download it in your original format.
Frequently asked questions
How do I resize an image without it looking stretched?
Keep the "Lock aspect ratio" checkbox on. Then changing the width automatically adjusts the height (and vice versa), so the photo keeps its natural proportions with no stretching or squashing.
Will resizing make my image blurry?
Shrinking a large photo almost always stays sharp. Enlarging beyond the original size can look soft because the browser has to invent new pixels — the tool allows up to 200%, which works fine for modest upscales.
What format will the resized image be?
The tool keeps your original format whenever possible — JPG stays JPG, PNG stays PNG, WebP stays WebP. Anything unusual falls back to PNG so nothing is lost.
Can I make an exact 400×400 profile picture?
Yes. Turn the aspect-ratio lock off, type 400 in both the width and height fields, and resize. Note this stretches non-square photos — for a proper square crop, use the Passport Photo Maker instead.
Is my image uploaded to a server?
No. Resizing happens entirely in your browser using the canvas API. Your files never leave your device, so the tool is safe for personal or sensitive photos.
Why use this tool?
Exact dimensions matter for profile pictures, marketplace listings, exam forms and social posts, where the wrong size means cropping, stretching or rejection. Resizing by pixels gives you control, resizing by percentage is faster for quick reductions, and previewing first means you never overwrite your only copy.
Free forever — no premium tier, no trial and no hidden charges.
Private by design — processing happens in your browser; your files and text are not uploaded.
No signup — open the page and use the tool immediately on phone or computer.