Clip a static WebP to a rounded rectangle and export genuinely transparent corner pixels. A bounded radius percentage is calculated from the shorter image dimension and used for one antialiased Canvas clipping path without resizing the source. The browser validates a genuine static WebP before decoding it, creates a clearly named derivative, reports output dimensions, and leaves the selected source unchanged.
How to use Round WebP Corners
- Choose one or more genuine static WebP files and open the rounded-corner clipping settings.
- Set the focused controls, run the browser-only edit, and inspect the output dimensions, preview, size, and warnings.
- Download the derivative, compare it at the intended display size, and keep the original until the edited result is approved.
What this tool is good at
When to use Round WebP Corners
Prepare a focused rounded-corner WebP derivative
Bake transparent rounded corners into a card image, thumbnail, badge, or asset that must carry its shape outside a specific CSS layout. Start with the actual static WebP and keep the source as the authoritative master until the edited derivative has been compared at its intended display size.
Apply the same decision to a local batch
The radius is a percentage of the shorter side, keeping the effect proportional across mixed portrait and landscape batches without resizing pixels. The shared queue supports repeatable settings across multiple product, campaign, interface, or client assets without creating an image-processing upload.
Create a reviewable design handoff
Download the clearly named result with its dimensions, preview, file size, and preservation warnings. The consuming system must retain WebP alpha; flattening onto an unexpected background can create halos, and CSS border-radius is preferable when shape should remain layout-editable. This gives the next editor or developer enough context to assess the change.
How to choose the right settings
Change only the intended visual property
Bake transparent rounded corners into a card image, thumbnail, badge, or asset that must carry its shape outside a specific CSS layout. Use the focused control range instead of stacking unrelated corrections, then inspect edges, text, transparency, gradients, and high-contrast detail before accepting the output.
Choose quality after judging the effect
The browser creates new WebP pixels for every Phase 11 operation. First settle the geometric, tonal, alpha, or filter setting, then balance output quality against measured file size rather than assuming the original compression survives.
Test transparency and destination rendering
The consuming system must retain WebP alpha; flattening onto an unexpected background can create halos, and CSS border-radius is preferable when shape should remain layout-editable. Preview the file against both light and dark backgrounds and open it in the real browser, CMS, editor, or messaging client that will consume the derivative.
Practical workflow and output details
Canvas creates an antialiased rounded-rectangle clipping path, draws the decoded image through it, and preserves transparent output corners. Processing uses a signature-checked static decode, bounded Canvas or typed-array work, local WebP encoding, and Blob downloads; selected image bytes are never posted to PicConverters.
The radius is a percentage of the shorter side, keeping the effect proportional across mixed portrait and landscape batches without resizing pixels. The consuming system must retain WebP alpha; flattening onto an unexpected background can create halos, and CSS border-radius is preferable when shape should remain layout-editable. Animation is rejected instead of flattened, metadata and embedded profiles are not copied into the re-encoded result, and the page limits its claims to the named visual operation.
Format behavior and limitations
A bounded radius percentage is calculated from the shorter image dimension and used for one antialiased Canvas clipping path without resizing the source. Corner pixels outside the path become transparent, so the destination must support alpha and the effect can disappear against an identical page background.
Canvas creates new raster pixels and the browser encodes a new WebP. Animation is rejected, metadata and embedded profiles are stripped, and output bytes or file size can change even when the canvas dimensions remain unchanged.
Government and research sources
These references support the format facts, metadata terminology, and privacy context explained on this page. They do not endorse PicConverters.
Documents WebP as a compressed raster format with lossy and lossless encodings, optional transparency, metadata, ICC profiles, and RIFF-based identification.
Research context for modern web-image formats, browser delivery, and the practical role of WebP derivatives.
Frequently asked questions
Does the Round WebP Corners upload my WebP?
No. The selected file is decoded, edited, re-encoded, and offered for download in the current browser tab; PicConverters does not receive its image bytes.
Will this work with animated WebP files?
No. This focused editor rejects animation instead of silently flattening it. Use an animation-aware PicConverters tool when frame timing and motion must survive.
What changes during rounded-corner clipping?
A bounded radius percentage is calculated from the shorter image dimension and used for one antialiased Canvas clipping path without resizing the source. Corner pixels outside the path become transparent, so the destination must support alpha and the effect can disappear against an identical page background. The new WebP does not preserve EXIF, XMP, ICC, or unrelated source metadata.
Related WebP tools
Border WebP
Add an exact solid-color border outside a static WebP without scaling or cropping the original image.
Change WebP Opacity
Multiply the complete static WebP image by one opacity percentage to create a uniformly translucent derivative.
Remove WebP Background
Remove a flat, corner-matched background from static WebP images with tolerance and feather controls.