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FileNimble

PNG to WebP Converter

Convert PNG files to WebP with full transparency preservation and adjustable lossy quality.

Runs in browser

Drop files here or click to upload

Supported formats: .png

Choose Files
Max 50 MB per file•Up to 20 files
100% Private — Processed locally in your browser

Limit: 24 megapixels and 16,384 pixels per side. Still images only; animation and metadata are not retained. Output size may increase. Files stay on this device.

Alpha Transparency is Fully Preserved

Unlike JPEG conversion, WebP fully supports transparent pixels. Your icons, logos, and transparent graphics will retain their exact transparent backgrounds without needing background color fills.

How to Convert PNG to WebP

Three simple steps to modernize and shrink your PNG images.

1

Upload PNGs

Drop your PNG files into the uploader. Batches up to 20 files are supported.

2

Select Quality

Pick your preferred compression level (85% default preserves crisp transparent edges).

3

Download WebP

Save your lightweight WebP images individually or download all as a convenient ZIP.

Common Questions

Frequently Asked Questions

Does WebP support transparent PNG backgrounds?

Yes! Unlike JPG, WebP includes native support for 8-bit alpha channel transparency. Converting your transparent PNGs to WebP will keep all transparent areas intact with file size determined by content and quality.

How much smaller is WebP compared to PNG?

There is no fixed reduction. WebP output depends on image content and quality, and small or already optimized PNGs can become larger. Compare actual results.

Are my PNG files uploaded to a remote server?

No. FileNimble executes the full conversion directly in your browser using HTML5 Canvas APIs. Your files never leave your computer.

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