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Free local image converter

PNG to WebP Converter — Free, Local, No Upload

The short answer: WebP reaches JPEG-level file sizes at comparable quality and keeps the transparency JPEG cannot. Converting a PNG to WebP is the standard move for shrinking web graphics — icons, logos, screenshots — without giving up the alpha channel. Pick a quality between 50 and 95% and the converter shows the exact byte savings.

How to convert PNG to WebP

Convert PNG to WebP now

The button opens the Image Format Converter with PNG → WebP preselected — it runs entirely in your browser and nothing is uploaded.

Open Image Format Converter

Local in your browser — nothing is uploaded

  1. Open the converter

    The button above opens the Image Format Converter with the WebP output already selected.

  2. Drop your PNG file

    Add the file (up to 12.0 MiB); the format is verified from its signature, not its name.

  3. Download the result

    Save the converted file and compare the exact before-and-after byte sizes.

Conversion facts

Input format
PNG
Output format
WebP
Max file size
12.0 MiB
Verified max input
A headless-browser test on 2026-09-20 converted a 12.0 MiB file end to end; the first byte over the limit fails with a clear error. Benchmark methodology
Max dimensions
Up to 8192 px per side · 24 MP
Quality
Lossy — quality 50–95%
Processing
Local in your browser — nothing is uploaded

PNG

PNG → WebP

What to watch

WebP export here is lossy: the browser canvas encoder exposes no lossless switch, so when every pixel must survive, convert to PNG instead. Encoding support is probed in your browser before conversion, and the WebP option stays disabled where it is missing — a download can never silently be a PNG wearing a .webp name.

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Frequently asked questions

Will converting PNG to WebP reduce image quality?
Yes. The WebP output is encoded with lossy compression, controlled by a 50–95% quality slider. The converter shows the exact before-and-after byte sizes, so you can re-run it at a higher quality if the result is not good enough.
Does WebP keep transparency?
Yes. The alpha channel survives this conversion, so logos, icons, and cut-out images stay transparent in the WebP file.