PNG to WebP Converter

How do you convert a PNG and check the WebP result?

Choose your PNG in Choose PNG files or drag & drop. A single file converts automatically and opens a before/after preview. Move the comparison divider to inspect the same part of the source and output. Change Quality if necessary, wait for re-encoding, and click Download. There is no separate initial convert button for local files.

For a concrete size-check example, suppose banner.png contains 1,048,576 bytes and the resulting banner.webp contains 262,144 bytes. The result card computes round((output − input) / input × 100): round((262144 − 1048576) / 1048576 × 100) = −75. It therefore shows a 75% reduction. These are illustrative measured sizes, not a promised result at any quality setting.

The filename changes from the PNG extension to .webp. In single-image mode you can edit the filename stem before downloading. Check both the byte count and the picture: a smaller output is useful only if the visible detail still meets your requirements.

How does Quality affect PNG to WebP conversion?

The slider accepts 10% through 100%. The conversion code rounds and clamps the selected percentage, then divides it by 100 before passing it to the browser encoder. Thus 80% becomes 0.8. This value controls encoding quality; it is neither a requested reduction percentage nor a target file size. The page offers no target-kilobyte field or lossless WebP switch.

For a single image, settings changes schedule a new conversion after a 300-millisecond pause. That pause is a debounce interval, not a conversion-speed guarantee. The converter reads the original file again for the new result, rather than repeatedly recompressing the previous WebP. Wait until the updated output is ready before comparing or downloading it.

Use the preview to examine lettering, fine lines, gradients, and edges around transparent objects. Raising quality can retain more visible detail but does not promise exact pixel equality. Keep your source PNG as an editable master, especially when later changes will require another export.

How do batch settings and per-file overrides work?

Selecting more than one file opens the batch list. It takes the first 50 files from the selection and converts them sequentially. If you have more images, split them into separate batches. Each row shows its source filename and, after success, the original and converted sizes. Failed conversions show their error on the affected row.

The Quality setting applies across the batch. For a particular image, open its gear button, whose accessible label starts with Override settings for, adjust Quality, and click Done. That override wins over the global setting. Use Clear override to return the image to the shared value. This helps when one set contains both photographs and text-heavy graphics.

Batch settings do not automatically replace completed outputs. Click Re-convert All, which includes the converted-file count in its label, after making changes. Then use an individual row's download button or Download ZIP. The archive is named converted-webp.zip and contains successful results only. Batch rows do not provide the editable filename field found in single-image mode.

Does WebP keep PNG transparency and image dimensions?

This page enables WebP alpha support without enabling a background-color fill. The engine draws the decoded image onto a canvas and exports it as WebP, so conversion does not intentionally replace transparent areas with white. Check the downloaded image against its intended page background as well as the preview, since edge colors remain part of the encoded picture.

The page does not expose resizing controls. Without a maximum-dimension setting, the engine creates the canvas from the decoded image dimensions, then draws the bitmap at its native size. The result displays output width and height when they can be read. To change pixel dimensions, use Image Resizer as a separate operation.

Practical differences between keeping the source and using this output

Requirement	Original PNG	WebP from this page
Exact source file	Retain as your master	Newly encoded image
Transparent background	Supported	Supported without a background fill
Quality adjustment	Source remains unchanged	10%–100% encoder setting
Smaller download	Use its existing byte count	Compare actual output; no guaranteed saving

What happens to metadata, color profiles, and animation?

Canvas conversion builds a new image from decoded pixels. The application does not copy PNG metadata chunks or embedded color profiles into the WebP result. Its explicit EXIF transfer path runs only when both the source and target are JPEG. The PNG path therefore has no working Keep EXIF metadata option; the Metadata panel instead explains that conversion removes EXIF data.

This is not a color-managed archival export or an animation converter. The engine draws one decoded bitmap and contains no frame loop or animation encoder, so do not use it to preserve an animated PNG sequence. It also provides no profile-selection controls. Retain the original whenever animation, embedded information, or a specific color workflow is essential.

What limits and input errors should you expect?

The upload hint says up to 100 MB per file, but that displayed figure is not a guarantee that a large image will convert. Decoding and allocating a canvas depend on the browser and available memory. The engine rejects an empty input and reports decoding or export failures as conversion errors. Try fewer files or smaller dimensions if a large source repeatedly fails.

Local file selection, drag and drop, and clipboard image paste are available. The separate Image URL field uses Fetch & Convert to retrieve an image from its address. That request can fail because of browser cross-origin restrictions or the site's connection policy. If it fails, download the image yourself and choose the local file instead. Local conversion does not require sending that file to a conversion server.

When should you keep PNG or choose another output?

Use the WebP result when its measured size, appearance, and compatibility with your destination meet your needs. Keep PNG for further editing or when the destination requires it. Converting back with WebP to PNG changes the container and encoding; it cannot restore detail already lost during a lossy export.

If your destination needs an opaque JPEG, use PNG to JPG and choose a background for transparency. For another format such as AVIF, use Universal Image Converter and check the actual output there. This dedicated page fixes the destination to WebP and concentrates on previewing, quality adjustment, and batch downloads.