Convert PNG to WebP Online — Up to 80% Smaller

Dramatically reduce PNG file sizes by converting to WebP.

How It Works

  1. 1Upload your file by dragging it into the drop zone or clicking to browse.
  2. 2Adjust the quality slider to balance file size and visual fidelity (optional).
  3. 3Click Download to save your converted file.

About PNG to WebP

PNG files can be very large, especially for photographs or complex graphics. WebP offers both lossy and lossless compression that's dramatically more efficient — often producing files 60-80% smaller than PNG. This is particularly impactful for web developers looking to improve page load times. This tool converts your PNG files to WebP format entirely in your browser, with an adjustable quality slider so you can control the trade-off between file size and quality.

Frequently Asked Questions

How much smaller is WebP compared to PNG?

WebP files can be 60-80% smaller than PNGs, especially for photographs. For graphics with flat colors, the savings are typically 30-50%. Either way, you'll see significant size reduction.

Is my file uploaded to a server?

No. Transmute processes everything locally in your browser using JavaScript and the Canvas API. Your files never leave your device — there is no server, no upload, no cloud processing.

Does WebP support transparency like PNG?

Yes! WebP supports alpha channel transparency just like PNG, but with much better compression. It's the best of both worlds — small files with full transparency support.

Is converting PNG to WebP lossy?

By default, the conversion uses lossy WebP compression (like JPG). You can increase the quality slider to maximum for near-lossless results, though the file will be larger.

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