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The quickest offline conversion is dwebp image.webp -o image.png. You can also use ImageMagick with magick image.webp image.png, or Pillow in Python. All three keep the file on your computer; check transparency, dimensions and animation afterward because a successful conversion does not guarantee that every source property was preserved.
Choose the right local method
Use the tool that matches the job:
| Method | Best for | Input and output | Important consideration |
|---|---|---|---|
dwebp |
One WebP file from a terminal | WebP to PNG or PPM | Google’s dedicated WebP decoder; the documented command is short and predictable. |
| ImageMagick | Mixed formats, scripted workflows and batches | WebP to PNG, plus many other formats | Offers broad image-processing controls; use separate output names so a source is not overwritten. |
| Pillow | Python applications and custom folder processing | WebP to PNG in Python | Requires a Pillow build with WebP support and libwebp 0.5.0 or later. |
Convert one file with Google’s dwebp
dwebp is the most direct dedicated decoder. From the directory containing the file, run:
dwebp image.webp -o image.pngThe command reads image.webp and writes image.png. Give full paths when the files are elsewhere, for example:
dwebp /path/to/source.webp -o /path/to/output.pngOn Windows, quote paths containing spaces:
dwebp "C:UsersYouPicturessource.webp" -o "C:UsersYouPicturessource.png"If the shell says that dwebp is not found, install the WebP command-line utilities for your operating system, then open a new terminal and verify with dwebp -version (or run the executable by its full path). The decoder writes a PNG; it does not upload the image anywhere.
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Convert with ImageMagick
ImageMagick uses the same basic pattern for many formats:
magick image.webp image.pngFor a different folder:
magick /path/to/source.webp /path/to/png-output/image.pngImageMagick is useful when conversion is one step in a larger pipeline. You can add operations before the output, such as resizing, but avoid changing more than you need if the goal is a faithful format conversion. The WebP implementation exposes controls for quality, lossless mode, alpha compression, filtering and encoder method; those settings primarily affect WebP encoding. For WebP-to-PNG work, validate the resulting dimensions, transparency and readability in the destination application.
Batch-convert WebP files
Keep the source and destination directories separate. On macOS or Linux, this shell loop creates a PNG beside each WebP in an output directory:
mkdir -p png-output
for file in *.webp; do
magick "$file" "png-output/${file%.webp}.png"
doneFor a recursive folder tree, process each file explicitly and create matching directories rather than writing over the originals. On Windows PowerShell:
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Get-ChildItem -Filter *.webp | ForEach-Object {
magick $_.FullName (Join-Path 'png-output' ($_.BaseName + '.png'))
}These examples derive the output name from the source basename and change only the extension. Test with a small folder before processing thousands of files.
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Convert WebP to PNG with Python and Pillow
Pillow reads and writes WebP files when its build includes WebP support. That support depends on libwebp 0.5.0 or later. A minimal one-file script is:
from PIL import Image
with Image.open("image.webp") as image:
image.save("image.png", format="PNG")Save it as convert.py and run python convert.py. If Pillow cannot identify the WebP, inspect the installation’s WebP support before modifying the source file; reinstalling Pillow with a compatible build may be necessary.
Batch conversion in Python
This script converts every .webp file in webp-input to a separate png-output directory. It loads each image inside a context manager so file handles close promptly:
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from pathlib import Path
from PIL import Image
source_dir = Path("webp-input")
destination_dir = Path("png-output")
destination_dir.mkdir(parents=True, exist_ok=True)
for source in source_dir.glob("*.webp"):
destination = destination_dir / f"{source.stem}.png"
with Image.open(source) as image:
image.save(destination, format="PNG")
print(f"Wrote {destination}")To include uppercase extensions, add a second glob for *.WEBP, or compare source.suffix.lower() while iterating over all files. Do not use the same path for input and output.
Transparency, quality and animation
Transparency
PNG supports an alpha channel, but you should verify that transparent pixels remain transparent. Open the result over both a light and dark background, or use an editor’s checkerboard. A white-looking background can mean that the viewer is displaying transparency as white rather than that the alpha channel was lost.
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Quality and file size
PNG compression is lossless, but it cannot restore detail discarded when the original WebP was encoded with lossy compression. Converting to PNG may therefore make the file much larger without improving visual quality. Compare dimensions and inspect edges at 100% zoom before choosing PNG as a delivery format.
Animated WebP
Do not assume that an animated WebP becomes an animated PNG automatically. The cited dwebp documentation describes PNG or PPM output, while Pillow documents WebP frame and duration metadata; neither statement guarantees an animated-PNG export for your command. Check whether your tool produced one frame or a sequence, and confirm what the consuming application requires. If animation matters, open the output in an animation-aware viewer and inspect frame count and timing.
Color and metadata
After conversion, check dimensions, orientation, color appearance and any metadata your workflow depends on. Different viewers can apply color profiles differently. If the PNG is for a website, verify it in the browser and in the production pipeline rather than relying only on the file extension.
Troubleshooting local conversions
“Command not found” or “not recognized”
The executable is not installed or is not on your PATH. Install the WebP utilities or ImageMagick, restart the terminal, and run a version command. If multiple installations exist, call the executable by its absolute path to identify which one is running.
ImageMagick reports that WebP is unsupported
Your ImageMagick build may lack WebP delegates. Check the format list with magick -list format and look for WebP support. Use dwebp instead, or install an ImageMagick package built with WebP support.
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Pillow cannot identify the image
Confirm that the file is actually WebP and is not truncated or mislabeled. Then check the Pillow build’s WebP capability and its libwebp dependency. A different Python environment can contain a different Pillow build, so run the script with the same interpreter where Pillow was installed.
The output has a solid background
Inspect the alpha channel against a checkerboard. If transparency is absent, test the same source with another decoder such as dwebp and compare results. Also check whether the original WebP itself contains transparency; a file named .webp is not necessarily transparent.
The result is only one frame
That is a normal possibility for animated input. Determine whether you need a still image, a frame sequence or an animated output format, then choose a workflow that explicitly supports that requirement. Do not distribute a single extracted frame when the animation is part of the design.
The batch job overwrote files
Stop using identical source and destination names. Write to a dedicated output directory, test on copies, and add an overwrite policy to your script. ImageMagick can otherwise replace an existing output without giving you the backup you expected.
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Local conversion is usually limited by disk I/O and CPU time, not network speed. For a few images, the difference between tools is rarely important; for large folders, process sequentially first, watch memory usage, and write to a fast destination disk. Pillow’s context-manager pattern prevents many files from remaining open during a batch.
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Working locally keeps the source files on your machine and avoids upload limits or third-party retention policies. It also means you are responsible for installing a decoder, handling damaged inputs and validating outputs. Preserve the originals until the PNG files pass your dimensions, transparency and animation checks.
Or skip the browser setup
If what you really need is a clean screenshot of a live webpage—not conversion of an existing local WebP—ScreenshotNeo provides a one-request screenshot API. It accepts the cookie or consent banner as a visitor and removes more than 60 known consent platforms, newsletter popups and chat widgets before capture; each step can be disabled. Bot checks, CAPTCHAs, blank pages, timeouts, failed loads and cache hits are not billed, and each response identifies the page verdict and billing status in headers.
Use the API documentation at https://screenshotneo.com/docs/. A cURL request is:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpPython:
import requests
r = requests.get("https://api.screenshotneo.com/v1/shot", params={"access_key": "YOUR_API_KEY", "url": "https://stripe.com"}, timeout=90)
open("shot.webp", "wb").write(r.content)Node.js:
const q = new URLSearchParams({ access_key: 'YOUR_API_KEY', url: 'https://stripe.com' });
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Frequently Asked Questions
Can I remove the original WebP after conversion?
Yes, but wait until the PNG opens correctly in the application that will use it and your backup or retention policy allows deletion. Conversion tools do not provide a recoverable copy once you remove the source.
Does changing the extension from .webp to .png convert the file?
No. An extension only labels a file; the image data must be decoded and written in PNG format by a converter such as dwebp, ImageMagick or Pillow.
Can a PNG be converted back to the original WebP byte-for-byte?
No. A PNG contains different encoded data, and a lossy WebP’s discarded detail cannot be reconstructed. You would need the original WebP to reproduce it.
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