Free Online Image Resizer

Resize a single image in the browser with custom width and height controls, aspect-ratio locking, optional upscale prevention, and JPG, PNG, or WebP export.

privacy_tipProcessed locally without uploading source images
straightenSingle-image resize flow with less setup
imageExport to JPG, PNG, or WebP

Upload an image to start resizing

Supports JPG, PNG, and WebP. Upload one image, enter the target dimensions, and export the resized result directly in the browser.

A more direct size edit

Upload one image, type the target dimensions, and export without opening a crop box or another tool.

Ratio control stays clear

Keep the original proportions locked for faster resizing, or unlock them when exact width and height matter more.

The export result stays visible

Check the target dimensions, scale ratio, and output format before downloading the resized image.

Fits these common scenarios

Useful when you need consistent platform dimensions, cleaner article imagery, or fixed export sizes for design handoff.

  • Social media cover size standardization
  • E-commerce product image dimension cleanup
  • Blog and editorial header image sizing
  • Ad and landing page asset resizing

Resizing fits the stage where you need exact pixel specs

When the framing is already decided and the remaining job is to match a platform requirement, layout slot, or delivery spec, resizing should happen later in the workflow. It solves width and height requirements, not composition or file size.

Input range
Accepts single JPG, JPEG, PNG, and WebP images, which makes it better for one-by-one size checks than for applying a batch rule.
Output control
Supports custom width and height, aspect-ratio locking, upscale prevention, and export to the original format, JPG, PNG, or WebP.
Usage threshold
You can export right after entering the target size; when composition is already correct, the path stays shorter than going through a crop flow first.

Best for

Platform sizing and delivery spec alignment

When the main goal is to match a slot, ad unit, or publishing requirement, resizing is more direct than cropping.

Watch out

Forced dimensions can stretch the image

If you unlock the aspect ratio and enter mismatched values, faces, products, or text can look compressed or elongated, so the preview still needs a quick check.

Not ideal

It should not replace crop or compression workflows

If you need to reframe the subject, remove image edges, or reduce file size aggressively, use the crop or compression tool instead.

Image Resize FAQ

These are the most common questions about aspect-ratio control, local processing, supported formats, and export quality when resizing an image.

Does resizing also compress the image?

Resizing does not apply a separate compression workflow by itself, but when you export as JPG or WebP you can use the quality slider to balance file size and visual clarity.

Can I enter only width or only height?

Yes. When aspect-ratio locking is enabled, entering one dimension automatically calculates the other from the original image ratio.

Are images uploaded to a server?

No. Uploading, resizing, and exporting all happen locally in your browser.

Which formats are supported?

The page accepts JPG, JPEG, PNG, and WebP images and can export to the original format, JPG, PNG, or WebP.