Add a Stroke to a PNG
Draw a uniform outline around the opaque shapes in a PNG. Runs entirely in your browser, so your data never leaves your device.
Drop a file here, or click to browse
Files never leave your device
Output
The result appears here as you type.
How to use Add a Stroke to a PNG
- 1. Upload a PNG with a clear silhouette. Add the PNG you want outlined. It works best on artwork with transparency, since the stroke traces the boundary between opaque pixels and empty space.
- 2. Pick the stroke color and width. Choose Stroke color and set Stroke width in pixels. A thin stroke keeps detail readable on small icons, while a thick stroke reads clearly on a sticker meant for a busy background.
- 3. Download the outlined PNG. Download the file once the preview shows a consistent line hugging every shape in the image. Re-run with a different width if the outline looks too thin or overwhelms the artwork.
When to use Add a Stroke to a PNG
Add a Stroke to a PNG traces a uniform outline around the opaque shapes in a transparent image, the same effect chat app stickers and die-cut labels use to stand out. It saves opening a vector editor just to add an edge.
- Making a sticker pack readable. Chat stickers with transparent backgrounds disappear against dark chat themes. A white stroke around each character or icon keeps them visible on any background color.
- Preparing a die-cut label mockup. A print shop mockup for a die-cut sticker needs a visible cut line around the artwork. Adding a stroke in the cut-line color shows exactly where the blade will follow.
- Separating a logo from a busy photo. A logo overlaid on a product photo can blend into similar colors behind it. A thin contrasting stroke gives the logo a clean edge that reads at any size.
Examples
Sticker outline
Input
logo.png (transparent bg) + 4px black stroke
Output
logo.png with a crisp outline hugging its shapes
About the Add a Stroke to a PNG tool
Add a Stroke to a PNG is a free online tool that works entirely inside your web browser. Draw a uniform outline around the opaque shapes in a PNG. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 108 PNG utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with 2 settings, including Stroke color and Stroke width (px), and the result refreshes the moment you change one. The finished file is put together in browser memory and saved with the Download button, so it never touches a server on the way to your disk. A worked example further down the page shows exactly what the tool produces for a real input.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Is Add a Stroke to a PNG free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Are my files uploaded to a server?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
Which files does Add a Stroke to a PNG accept?
It accepts PNG images. There is no file size cap imposed by a server; very large files are limited only by your device's memory.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I save the output?
Click the Download button once the result is ready. The file is built in your browser's memory and handed straight to your downloads folder, without passing through a server.