Image Resizer

Every platform wants a different size: a profile photo at 400×400, a blog hero at 1200×630, a marketplace listing at 2000px on the long edge. Uploading the wrong size means blurry results, awkward crops by the platform, or files rejected outright. This resizer gives you precise control: enter the exact width and height you need, or scale by percentage, keep the aspect ratio locked so nothing stretches, and download the result as JPG or PNG. It is also the quickest way to tame a folder of oversized camera photos for email or upload forms with strict limits — one image at a time, exactly the size the destination demands.

Quick Answer: Upload an image, enter the target width and height (or a percentage), keep proportions locked if you like, and download the resized copy.

Free Online Tool

Exact pixels for picky platforms.

Choose an image

Width (px)

Height (px)

Or scale (%)

Keep aspect ratio
Output format

Resized preview

How to Use the Image Resizer

Upload the image you want to resize.
Note its original dimensions, shown automatically.
Type the new width — with proportions locked, the height follows automatically (or use the percentage scale).
Choose the output format: JPG for photos, PNG for graphics with transparency or text.
Download your exactly-sized image.

Key Features

Resize by exact pixels or by percentage.
Aspect-ratio lock prevents squashed or stretched results; unlock for exact forced sizes.
JPG or PNG output with a quality setting for JPG.
Shows original and target dimensions before you commit.
Private by design: resizing happens on your device only.

Best Practices and Tips

Never upscale beyond the original if quality matters — a resizer cannot invent detail that is not there.
Resize to the largest size the platform displays; anything bigger wastes bytes, anything smaller looks soft.
Keep a master copy at full size and generate each platform size from it, rather than resizing a resize.
For profile and avatar squares, resize the long edge to size, then crop — the cropper tool on this site finishes that job.
Batch consistency: note the exact dimensions a marketplace uses (they publish them) and resize every listing image to match.

Common Mistakes to Avoid

Unlocking proportions and typing both dimensions freely, producing stretched faces and logos.
Resizing a small image up for print, expecting sharpness that the pixels cannot support.
Saving screenshots as JPG at low quality, turning crisp text into mush — PNG exists for those.
Forgetting that some platforms strip or recompress anyway; being slightly above their display size is the safe side.

Frequently Asked Questions

What happens if I make an image bigger than the original?

The tool will do it, but the result will look soft — resizing up stretches existing pixels and interpolates guesses between them. It is acceptable for small increases and previews, not for print or hero images. Work from the largest original you have.

Does resizing change the file size too?

Almost always, dramatically. File weight grows roughly with the pixel count, so halving both dimensions typically quarters the file size. Pair resizing with the compressor for maximum savings when both dimensions and quality need attention.

Which format should I choose on download?

JPG for photographs and anything without transparency — smallest files. PNG for logos, icons, screenshots with text and anything needing a transparent background, accepting the larger size as the price of crispness.

Can I resize many images at once?

This tool handles one image per pass, which keeps quality control in your hands. For dozens of images at identical settings, a desktop batch tool is faster; for the common ‘this one image, this exact size’ job, this page is quicker than opening an editor.

Are my images uploaded?

No. Resizing uses your browser’s image engine locally. Your pictures never leave your device, making it safe for client assets and personal photos.