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Resize Image Online

Free, browser-based, no upload required

Resize any image to exact pixel dimensions in your browser. Enter your target width and height, choose a resize mode, and download the result instantly. Supports JPEG, PNG, WebP, AVIF and HEIC.

No uploads

Files stay on your device

3 resize modes

Fit, fill or stretch

Any format

JPEG, PNG, WebP, HEIC

W
H

Scales and crops to fill exact size. No white space. No distortion. Recommended.

85
Smaller fileBetter quality

Drop image here to resize to 1920x1080

JPEG, PNG, WebP, AVIF, HEIC. All processing stays in your browser.

Understanding resize modes

Fill (default)

Recommended

Scales the image to completely fill the target dimensions while preserving the aspect ratio. Any excess pixels are cropped from the center. No white space, no distortion — this is what most tools do by default.

Good for: Social media posts, thumbnails, wallpapers

Fit

No cropping

Scales the image to fit entirely within your target dimensions while keeping the original aspect ratio. If the proportions differ, white padding is added to fill the remaining space. Nothing is ever cropped.

Good for: Portraits, documents, logos

Stretch

Exact dimensions

Forces the image to exactly match the target dimensions by stretching or squashing. The aspect ratio is not preserved. Use only when distortion is acceptable.

Good for: When exact pixel match is required

What if my image is smaller than the target size?

If your source image is smaller than the target dimensions, the tool will upscale it to reach the requested size. A warning is shown because upscaling raster images reduces sharpness — the algorithm can only interpolate new pixels, it cannot recover detail that was never in the original.

For most use cases (web uploads, social media, document attachments) the result is still perfectly usable. The visual quality difference between a slightly upscaled image and the original is rarely noticeable at normal viewing sizes.

Best practice: Always start from the highest-resolution version of your image when upscaling is required. If you need to increase an image size significantly, the result will be soft and may show artifacts. For AI-quality upscaling, a dedicated upscaling tool with a super-resolution model is needed.

Frequently asked questions

What is the difference between fit, fill and stretch resize modes?

Fit scales the image to fit within the target dimensions while preserving the aspect ratio. If the aspect ratios differ, white padding is added. Fill scales the image to fill the target dimensions while preserving the aspect ratio, cropping the center if needed. Stretch forces exact dimensions regardless of aspect ratio and may distort the image.

What happens if my image is smaller than the target dimensions?

The tool will upscale your image to reach the target dimensions. A warning is displayed because upscaling raster images (JPEG, PNG, WebP) reduces sharpness since no new detail can be added. For best results when upscaling is needed, start from the highest-resolution version of your image.

Which output format should I choose, JPEG or PNG?

Choose JPEG for photographs and images without transparency. It produces smaller files and is universally compatible. Choose PNG when the image has a transparent background, when you used Fit mode with padding (the padding will be white in JPEG but transparent in PNG if desired), or when you need lossless quality.

Can I resize while keeping the aspect ratio?

Yes. Enable the aspect ratio lock button between the width and height inputs. When locked, changing either dimension automatically updates the other to maintain the original proportions. Alternatively, use Fit mode, which always preserves the aspect ratio.

Is my image uploaded to a server?

No. All resizing happens entirely in your browser using WebAssembly. Your image never leaves your device.

What image formats are supported?

JPEG, PNG, WebP, AVIF and HEIC are all supported as input. The output is JPEG or PNG depending on your selection.