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Resize a WEBP

Scale WEBP images to exact pixel dimensions or a target size in KB.

Resize a WEBP to exact pixel dimensions or to a target file size in KB, with the encoder search measuring real output bytes rather than estimating.

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Drop your image here

or choose an image from your device

Accepts WEBP images · No fixed size limit — we adapt to what your device can handle. Very large files may take longer or show a warning.

About Resize WEBP

Dimensions vs target size

Dimensions mode scales to the width and height you enter. Target size mode instead takes a KB figure and repeatedly encodes and measures the WebP output, adjusting quality until it actually fits — the same approach used by the JPG and general resizers.

Resizing re-compresses

Because WebP output here is always lossy, resizing also re-encodes the image at the quality you set — a second lossy pass over whatever compression the source already had. Start from the best-quality original you have rather than an already-compressed export.

Settings and output

Target size search

Enter the KB limit you need and the tool finds a quality value that fits it, reporting the real size produced. If it can't reach the target, reducing the width usually resolves it.

When to use it

  • Producing a WebP at the exact pixel width a page layout or app asset requires.
  • Hitting a byte-size limit for a WebP upload without manually testing quality values.
  • Shrinking a large WebP photo before adding it to a gallery or CDN.

Limitations to know

  • Output is always lossy WebP — there's no lossless mode in this tool.
  • Upscaling beyond the source resolution produces a bigger file without adding real detail.
  • An impossible target size at the current dimensions needs a smaller width first, not a lower quality floor.

Common problems and fixes

The WebP still isn't small enough after resizing.

Reduce the pixel width as well as relying on quality — dimensions have a much bigger effect on file size than the last few points of quality.

Colours or transparency look slightly different after resizing.

Scaling resamples both colour and alpha, which can produce very minor softening at edges. This is a normal side effect of changing pixel dimensions, not a bug.

Can I resize a lossless WebP without making it lossy?

Not with this tool — output here is always encoded with a quality value. Keep a copy of the lossless original if you need it again.

How to use it

  1. 1Drop a WEBP file into the upload area.
  2. 2Pick 'Dimensions' for exact pixels, or 'Target size' to aim for a specific KB figure.
  3. 3Press Resize. The image is scaled on a canvas and re-encoded as WEBP; in target mode the encoder is measured and retried until the output fits.
  4. 4Download the resized WEBP and check the reported dimensions and bytes.

Frequently asked questions

Why choose WEBP output for a resized image?

At the same perceived quality, WebP files are typically 25–35% smaller than JPG and keep transparency, which makes it a good default for web pages and app assets.

Does resizing re-compress the image?

Yes — the output is encoded fresh at the quality you set, so it's a lossy pass over an already-lossy source. Resize from the highest-quality original you have.

Is transparency preserved?

Yes. Alpha is scaled with the image and WebP stores it in the output.

What if the target size can't be reached?

You're told the real size that was produced instead of getting a file that quietly missed the target. Reducing the dimensions as well usually gets you there.

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