Resize Image Online Free
Set the exact pixel size you need and the tool keeps the proportions locked. It also explains pixels versus inches, so your resized image displays and prints correctly.
Drag & drop your image
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JPEG · PNG · WEBP
Max recommended: 20MB
Set the exact pixel size you need and the tool keeps the proportions locked. It also explains pixels versus inches, so your resized image displays and prints correctly.
Benefits of resize image
- Set exact pixel output for banners, listings, emails and print layouts without guesswork.
- Aspect ratio stays locked by default, so nothing stretches or distorts.
- Makes pixels-versus-inches concrete, so the image is as large on screen as it will print on paper.
- Downscales from any starting size: a 48-megapixel camera shot to a 1200px web crop in one step.
- Lightweight output, too - a reduced size is also a smaller file, which keeps pages fast.
How to use this tool
- Choose the image and decide whether you want pixel output or a percentage scale.
- Enter the exact width or height; the missing dimension is computed automatically to hold the aspect.
- Unlock the aspect lock only when you deliberately need to stretch into a new shape.
- Preview the new dimensions and file size before finalizing.
- Download the resized image and compare it side by side with the original.
Why use this tool
- Pixels decide how an image renders on screens; inches decide how it renders on paper - and the two only connect through DPI.
- A 4000px-wide camera file shown at a 300px design slot is wasted bandwidth that resizing recovers instantly.
- Keeping the aspect ratio locked avoids the stretched, distorted look that screams amateur in every layout.
How it works under the hood
Pixels are the only measurement that matters until output: screens render at 1:1, and DPI merely converts pixels to physical inches. 72 DPI is the classic web assumption, while print work at 300 DPI needs roughly four times as many pixels per square inch.
The tool recomputes the missing dimension to preserve the aspect ratio, so a width-only request automatically derives the correct height. Downscaling permanently discards pixels, which is harmless for display and can even smooth out fine image noise.
Frequently Asked Questions
What is the difference between resizing in pixels and in inches?
Pixels are what screens actually render, so 'width 800px' is exact on every display. Inches are only meaningful combined with DPI: at 300 DPI a 2100px-wide image prints at 7 inches, while at 72 DPI the same pixels print much larger but softer.
Does resizing change the file size?
Yes, usually for the better: fewer pixels mean fewer bytes, so a 4000px photo resized to 1200px drops to a fraction of the original size even before compression.
How do I resize without stretching or distorting the image?
Keep the aspect lock on: the tool derives the missing dimension from the one you entered, so proportions never change. Turn the lock off only when you deliberately need a different-shaped frame.
What resolution should I use for printing?
Aim for about 300 DPI at the final print size - roughly 2480 pixels across an A4 page. Find the pixel count by multiplying the print size in inches by 300.
Can the tool upscale an image to larger than the original?
Technically yes, but pixels cannot be invented: upscaling produces blurriness. It never matches native resolution, so we rarely recommend it.
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