Decoded input
The browser reads the actual WebP dimensions and file bytes. A filename alone is not treated as evidence.
Local batch converter
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
Each row reports source dimensions, output dimensions, source size, output size, and a direct download.
What is measured
The browser reads the actual WebP dimensions and file bytes. A filename alone is not treated as evidence.
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.
The report uses the generated PNG blob, so the displayed size is the size of the file available for download.
Format decision
Troubleshooting
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.
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.
This browser tool exports the decoded still frame. It does not create animated PNG files. Keep the original WebP when animation is required.
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
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.
No. PNG avoids adding another lossy compression stage, but it cannot reconstruct detail that is missing from the source WebP.
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.
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.
Batch-convert WebP files to PNG or JPG in your browser — measured, private, and free.
Open the converter