We use cookies.This website uses essential cookies to operate core features. With your consent, we also use analytics cookies to understand traffic and improve the service. For more details, see our .
We use cookies.This website uses essential cookies to operate core features. With your consent, we also use analytics cookies to understand traffic and improve the service. For more details, see our .
Was this tool helpful to use?
Your feedback helps us make it better
Easily add rounded corners to images online for free. Customize the border radius and export high-quality PNGs with transparent backgrounds instantly.
Output is PNG to preserve transparency
Choose filesClick or drag images to add rounded corners (batch supported)
Image (Supported formats: .avif, .bmp, .gif, .jpeg, .jpg, .png, .webp)
Max 1 MB
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
This image editor masks the four corners of an image or keeps a centered circular area, then exports a PNG. In rounded-rectangle mode, all four corners share one radius. In circle mode, the visible circle uses the shorter image dimension as its diameter and stays centered on the original canvas. A landscape image therefore keeps its wide canvas, with transparent areas to the left and right of the circle.
Pixel mode reads the radius as pixels. Percentage mode uses the shorter side of the image as its reference: on a 400 × 300 px image, a 20% radius is 60 px. The effective radius cannot exceed half the shorter side, so a larger pixel entry is capped at that boundary. This cap keeps the curve inside the image. The output canvas keeps the source width and height; the transparent corner areas remain part of the PNG rather than being trimmed away.
PNG supports alpha transparency, which lets the masked areas reveal whatever background sits underneath when you place the file in a design or page.
W3C PNG Specification supports the PNG format’s alpha transparency; checked 2026-09-28. Read the specification
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Add one or more image files and inspect each source image in the work area.
Choose rounded rectangle or circle. For rounded rectangles, set a radius in pixels or as a percentage; the percentage is based on the shorter side.
Process the images and inspect the edges against a contrasting background. Adjust the radius or shape and process again if the curve hides too much of the subject.
Download a PNG for each finished image. When processing a group, download the individual results or the available package of completed files.
For example, on a 900 × 600 px photo, circle mode shows a centered circle 600 px across while preserving the 900 × 600 px canvas. Check whether the destination app crops that transparent canvas again before you share the file.
Use cases
See how the tool fits into real work and everyday tasks.
Use circle mode for a centered avatar crop, then check that the face or logo sits inside the visible circle. Keep in mind that the exported canvas retains its original proportions.
Apply the same rounded-rectangle radius to a batch of product photos when you need a uniform edge treatment. Review each preview because a subject close to a corner may lose visible detail.
Place a rounded PNG over a colored slide or page background. The transparent corners let that background show through without painting a white corner into the image.
Q&A
Find concise answers to common questions and confusing cases.
That area may be the image viewer’s background showing through transparent pixels. Place the PNG over another color to distinguish transparency from pixels that are actually part of the image.
No. It draws a centered circle on the original width and height. A landscape or portrait image can therefore have transparent bands on the longer dimension.
The radius is limited to half of the shorter image side. Values beyond that limit cannot make the curve extend farther across the canvas.
Notes
Review scope, result limitations, and important precautions before use.
The export is PNG, even when the original file used another format. Its dimensions follow the source image, and circle mode does not trim transparent margins. A social profile, design app, or website may crop, resize, flatten, or recompress the file after you add it, so inspect the result in the place where it will appear. The workbench accepts only images it can load in the current browser; very large files may take longer or fail to process.
Related
Discover related tools, collections, and available API capabilities.