PNGToolbox

Local batch converter

Convert WebP to PNG and inspect the real output

Choose one file or a batch, optionally resize it, then compare the decoded dimensions and measured file sizes before downloading. Files stay in this browser.

WebP to PNG

Convert and verify

Conversion reportMeasured in your browser
0 files
PNG

Your measured results appear here

Each row reports source dimensions, output dimensions, source size, output size, and a direct download.

What is measured

A result you can check, not a promised conversion

01

Decoded input

The browser reads the actual WebP dimensions and file bytes. A filename alone is not treated as evidence.

02

Rendered output

The image is drawn to a canvas at the requested dimensions and encoded as PNG by default — or as JPG at your chosen quality when you select that format.

03

Measured output

The report uses the generated PNG blob, so the displayed size is the size of the file available for download.

Format decision

When PNG helps and when it does not

Need transparency in office or design softwarePNG is usually the safer compatibility choice.
Need a smaller photo for a websiteKeep WebP. PNG can be several times larger for photographs.
Need crisp logos, diagrams, or screenshotsPNG preserves the decoded pixels and sharp edges without another lossy pass.
Need to recover detail already lostConversion cannot restore information removed by earlier compression.

Troubleshooting

Why a converted PNG may look or behave differently

PNG is much larger

This is normal for photographic WebP files. PNG uses lossless compression and prioritizes exact decoded pixels, transparency, and broad editor compatibility rather than minimum web-delivery size.

Transparency looks black

Some viewers display transparent pixels against black. Open the PNG in an editor with a checkerboard preview or place it over a colored background before concluding that alpha was lost.

An animated WebP becomes still

This browser tool exports the decoded still frame. It does not create animated PNG files. Keep the original WebP when animation is required.

The browser runs out of memory

Very large images require multiple in-memory canvases. Convert fewer files at once or resize the output. The 20 MB input limit reduces, but does not eliminate, device-specific memory limits.

Questions

WebP to PNG FAQ

Are my images uploaded?

Normal conversion happens locally in this browser. The tool reads selected files with browser APIs and does not need to send them to a conversion server.

Does conversion improve quality?

No. PNG avoids adding another lossy compression stage, but it cannot reconstruct detail that is missing from the source WebP.

Can I resize a batch?

Yes. One width or height can be applied to the whole batch. With ratio lock enabled, each file keeps its own aspect ratio during conversion.

Can I output JPG instead?

Yes. Choose JPG in the output format panel and set a quality level. Transparent pixels are filled with white because JPG has no alpha channel.

Ready to convert?

Batch-convert WebP files to PNG or JPG in your browser — measured, private, and free.

Open the converter