🖼️ WEBP to PNG Converter, Convert WEBP Images to PNG Online
By Shihab Mia · Updated 2026-08-02
Pick a .webp file. It stays on your device and is never uploaded.
Choose a WEBP image to get started.
This tool converts a WEBP image to PNG entirely in your browser: choose a .webp file and it draws the decoded image onto a canvas, then exports a lossless PNG you can preview and download in seconds. Transparency carries over automatically because both WEBP and PNG support an alpha channel, so icons, logos, and cutout graphics keep their see-through backgrounds. Nothing is uploaded; the whole conversion happens on your device using the canvas API, so your image never touches a server and the tool works offline once the page has loaded.
What is the WEBP to PNG Converter?
WEBP is a modern image format built by Google that can encode pictures either losslessly or lossily, usually producing much smaller files than PNG or JPEG at a similar visual quality. That efficiency is exactly why WEBP has become common on the web, but it is also why WEBP files sometimes need to become PNG again: many older desktop apps, some print workflows, certain content management systems, and a fair number of design tools still expect PNG (or do not accept WEBP uploads at all). Converting WEBP to PNG restores that universal compatibility, at the cost of a larger file, since PNG cannot use the same lossy compression tricks that make WEBP small.
Under the hood, this converter loads your WEBP file into an HTMLImageElement using an object URL, draws it onto an HTML canvas at its natural pixel dimensions with ctx.drawImage(img, 0, 0), and then calls canvas.toBlob with the "image/png" MIME type. There is no quality slider here, unlike a WEBP or JPEG export, because PNG only has one mode: lossless. The browser's PNG encoder takes the exact pixel values from the canvas, including the alpha channel, and compresses them without discarding any image data, so the resulting PNG shows the same pixels as the decoded WEBP, pixel for pixel.
A WEBP file that used lossy compression already discarded some detail at the point it was created, and converting it to PNG cannot bring that detail back; PNG will faithfully preserve whatever pixels the browser decoded from the WEBP, nothing more and nothing less. This matters most for photographic WEBP images: because the PNG encoder cannot compress photographic gradients and noise anywhere near as efficiently as WEBP does, the resulting PNG is often noticeably larger than the original WEBP file, sometimes several times larger, even though no new detail was added. That size increase is normal and expected; it is the price of switching to a lossless, universally compatible format.
Browser support for reading WEBP is now effectively universal (Chrome, Edge, Firefox, and Safari 14 and later since 2020), so this converter should decode almost any WEBP file you pick. The one honest limitation worth stating plainly: canvas.toBlob("image/png") depends on the browser's own PNG encoder, and while this has been reliable in every modern browser for years, this tool checks the returned blob's actual MIME type and shows a clear error rather than silently handing you a broken or mislabeled file if something ever goes wrong.
When to use it
- Converting a WEBP image you downloaded or received into PNG so it opens in an older photo viewer, print tool, or design app that does not accept .webp.
- Preparing WEBP graphics for upload to a content management system, forum, or online store that only accepts common formats like PNG or JPEG.
- Turning a transparent WEBP logo or icon into a PNG for a slide deck, document, or design file where WEBP support is unreliable.
- Getting a lossless PNG copy of a WEBP screenshot before annotating it in an editor that expects PNG input.
- Sending an image to a colleague or client whose software cannot open WEBP files, without installing any conversion software.
- Archiving WEBP assets as PNG for long-term storage in a workflow standardized on lossless formats.
How to use the WEBP to PNG Converter
- Click "Choose a WEBP image" and select a .webp file from your device.
- The tool loads it automatically and runs the conversion right away so you can see a real result immediately.
- Review the original size, PNG size, size change, and pixel dimensions in the stats grid, plus the live PNG preview.
- Click "Download PNG" to save the file, or "Copy result summary" to copy the size comparison as text.
Formula & method
Worked examples
A 45,000 byte photographic WEBP image (compressed with lossy encoding) is converted to PNG and the resulting PNG blob is 210,000 bytes.
- difference = 45,000 - 210,000 = -165,000 bytes
- percent change = -165,000 / 45,000 x 100
- percent change = -3.6667 x 100 = -366.7%
Result: The PNG is 165,000 bytes (about 366.7%) larger than the WEBP. This is normal for photographic content: PNG cannot compress the gradients and detail as efficiently as WEBP's lossy mode, so switching formats trades a smaller file for universal compatibility.
A small 3,200 byte transparent WEBP icon with mostly flat colour is converted to PNG and the PNG blob comes back at 3,800 bytes.
- difference = 3,200 - 3,800 = -600 bytes
- percent change = -600 / 3,200 x 100
- percent change = -0.1875 x 100 = -18.75%
Result: The PNG is 600 bytes (18.75%) larger than the WEBP, a much smaller increase than the photo example, since flat-colour icons compress efficiently under PNG's lossless algorithm too.
What to expect when converting different WEBP content to PNG
| Source WEBP content | Typical size change to PNG | Why |
|---|---|---|
| Flat-colour icon or logo | Small increase (10 to 40%) | PNG compresses flat colour and sharp edges well |
| Screenshot with text and UI | Moderate increase (30 to 100%) | Mix of flat regions and fine detail |
| Photograph or gradient-heavy image | Large increase (100 to 400%+) | PNG has no lossy mode to shrink photographic detail |
| Already-lossless WEBP | Roughly similar or slightly larger | Both formats are compressing the same lossless data |
WEBP versus PNG at a glance
| Property | WEBP | PNG |
|---|---|---|
| Compression | Lossless or lossy (source dependent) | Lossless only |
| Transparency | Yes (alpha channel) | Yes (alpha channel) |
| Typical file size | Smaller, especially when lossy | Larger, especially for photos |
| Compatibility | All modern browsers, some older apps lag | Universal, including legacy software |
Common mistakes to avoid
- Expecting the PNG to be smaller than the WEBP. WEBP is usually the smaller format, particularly when the source was lossy-compressed, so a larger PNG after conversion is expected, not a bug. Convert to PNG for compatibility, not for a smaller file; if size matters more than compatibility, keep the WEBP.
- Thinking conversion restores detail a lossy WEBP already discarded. If the original WEBP was saved with lossy compression, some image detail was already thrown away when it was created. Converting to PNG preserves exactly what the browser decodes from that WEBP; it cannot recover information that no longer exists in the file.
- Expecting this tool to resize the image. This converter changes format only; it draws the canvas at the WEBP's natural width and height, so the pixel dimensions stay exactly the same. If you also need different dimensions, resize the image separately.
- Not checking that the chosen file is really a WEBP. A file renamed to end in .webp without actually being a WEBP will fail to decode. This tool checks the file's type and extension before attempting conversion and shows a friendly error rather than a confusing failure if the file is not really a WEBP.
Glossary
- WEBP
- An image format developed by Google that supports both lossless and lossy compression plus an alpha (transparency) channel, usually producing smaller files than PNG or JPEG at similar visual quality.
- PNG
- A lossless image format that preserves every pixel exactly, including a full alpha (transparency) channel, at the cost of larger file sizes than lossy formats.
- Alpha channel
- The part of an image format that stores transparency information per pixel, allowing a see-through background. Both WEBP and PNG support it.
- Lossless compression
- A compression method that shrinks a file without discarding any detail, so the original pixels can be reconstructed exactly. PNG only offers this mode.
- Canvas.toBlob
- A browser API that renders the contents of an HTML canvas element into an image file (as a Blob object) in a chosen format, entirely on the user's device.
- Object URL
- A temporary local browser reference (blob:) that points to a file or blob in memory, used here to load the chosen WEBP and to offer the PNG result for download without any upload.
Frequently asked questions
Does converting WEBP to PNG lose quality?
No, the conversion itself is lossless: PNG saves exactly the pixels the browser decoded from the WEBP, including transparency. If the original WEBP was already lossy-compressed, that earlier loss cannot be undone, but converting it to PNG adds no further loss.
Why did my PNG come out bigger than the WEBP?
This is normal, especially for photographic images. WEBP can use lossy compression to shrink files far below what any lossless format can achieve, while PNG only has a lossless mode, so it typically produces a larger file for the same pixels.
Will transparency be kept when I convert WEBP to PNG?
Yes. PNG supports a full alpha channel just like WEBP, and this tool draws the image without any background fill, so transparent areas stay transparent in the PNG output.
Is my image uploaded anywhere during conversion?
No. The whole conversion happens in your browser using the canvas API. The WEBP is loaded from your device into memory, converted locally, and never sent to a server, which keeps it private and makes the result available instantly.
Can I convert an animated WEBP to PNG with this tool?
This tool converts a single still frame using the browser's image decoder, so an animated WEBP will produce one static PNG (typically the first frame), not an animated result. For animation, keep the WEBP or export to an animated format like GIF instead.
Why does the tool say my browser cannot export PNG?
This is extremely rare in modern browsers, but this tool checks the actual result of canvas.toBlob and tells you honestly if PNG export fails rather than offering a broken file. Updating to the latest Chrome, Edge, Firefox, or Safari will resolve it.