How to Round Image Corners Online (with Transparent Export)

Every modern interface rounds its corners: cards, avatars, buttons, app icons. Matching that aesthetic in standalone images makes them feel native wherever they land.

Rounded corners soften the visual weight of rectangles, prevent sharp-corner collisions in dense layouts, and signal interface-awareness — the difference between an image on a page and an image of a page.

What is the Rounded Corners tool?

The Rounded Corners tool is a free, browser-based utility that lets you round the corners of images for a softer, modern look — one file or a hundred at a time. There is nothing to install, no account to create, and no watermark stamped on your results. It runs on any device with a modern browser: Windows, macOS, Linux, Android or iPhone.

Unlike heavyweight creative suites, this tool does exactly one job and does it well. The interface follows a simple three-step pattern that stays consistent across the entire Pixly toolbox, so once you have used one tool you already know how to use them all: drop your files, adjust the options you need, and download the results.

How to round image corners — step by step

1. Open the tool. Navigate to the Rounded Corners page — it works on mobile and desktop alike.
2. Add your images. Drag & drop files onto the upload area, or tap Select images to browse. You can queue many files at once — the whole batch is processed in a single pass.
3. Adjust the options. Set the corner radius — small radii read subtle and product-like, large radii read playful and card-like — and export as PNG to keep the corners transparent.
4. Process. Hit the action button and let the pipeline run. Most batches finish in seconds; progress is shown per file.
5. Download. Grab files individually or download everything in one archive.

Why do this in the browser instead of desktop software?

• Zero setup. No downloads, no licence keys, no updates — open a tab and work.
• Batch-first design. Queueing a hundred files is as easy as queueing one — the pipeline processes the whole set in one pass.
• Privacy by design. Uploaded files are deleted automatically after 24 hours, and processed output is yours alone.
• Consistent results. The same engine and the same options run on every platform, so your output never depends on which machine you use.

Who uses Rounded Corners?

Rounded corners show up everywhere polish matters:

• App and web teams producing interface-ready asset variants
• Presenters softening screenshots inside slides
• Email designers building card-style content blocks
• Social teams matching a brand’s rounded visual language

Common mistakes to avoid

1. Exporting to JPG after rounding — JPG has no transparency, so corners fill with white; export PNG instead.
2. Radius too small to notice or too large to take seriously — 4–8% of the shorter side is the versatile middle.
3. Rounding screenshots that already contain rounded UI — double rounding looks nested and odd; crop slightly inside first.

Pro tips for better results

• Match the radius to the destination: use the same corner value your site or app uses for cards.
• Transparent PNG corners adapt to any background — the whole point of the format choice.
• Batch-round whole asset sets so every card in a layout shares one radius.

Frequently asked questions

Which format keeps rounded corners transparent?

PNG (or WebP). JPG flattens transparency to a solid fill, which defeats the purpose on non-white backgrounds.

What radius should I use?

Start at 5% of the shorter side and adjust to taste — interfaces typically use 8–16px on card-sized images.

Is the tool really free?

Yes — rounded Corners is completely free with no signup, no watermark and no daily cap. The Pixly toolbox is funded by unobtrusive ads, so the tools stay open to everyone.

Are my files safe?

Files are transferred over encrypted connections and deleted automatically after 24 hours. Nothing is shared with third parties, and no account or personal data is required to use the tool.

Final thoughts

The fastest way to understand how much time this saves is to try it once. Head to the Rounded Corners tool and process your first batch now. If you work with images regularly, pair it with the Add Border tool to cover the whole workflow without ever leaving the browser.