Add Border

How Add Border works

Add a solid border of any width and colour around an image. Borders are drawn outside the original pixels, so the image is not cropped. Everything happens inside this page: the tool reads your input, runs the calculation or conversion locally, and hands the result back to you. Nothing is transmitted, because there is no backend to transmit it to.

That design choice is deliberate. Most free tool sites upload your files to a server, process them there, and quietly keep a copy. Toolcin cannot do that — the site is a set of static files. If your connection dropped the moment the page finished loading, every tool would still work.

The border is added, not overlaid

The canvas grows by the border width on every side, so no part of the original image is covered. A 16-pixel border on a 1000 × 800 photo produces a 1032 × 832 file.

Width runs from 1 to 200 pixels and the colour is free, which covers everything from a hairline frame to a wide poster margin.

Choosing a width

A border that is too thin at full resolution disappears when the image is scaled for a thumbnail. As a rule, 1% of the shortest edge stays visible at display size — 10 pixels on a 1000-pixel image, 80 on an 8000-pixel scan.

For print, work in the final resolution: a 3 mm border at 300 dpi is 35 pixels.

Notes

PNG keeps the border and any transparency cleanly. JPEG has no alpha channel, so a transparent source gets a white fill from the canvas before the border is drawn.

The border colour is drawn in sRGB, so a brand colour will look right on screen and may shift slightly in print depending on the profile.

Good to know

• Works offline once loaded, including on flights and in locked-down networks.
• No file size limit beyond your device's own memory.
• Free to use, with no account and no usage counter.
• Results are produced locally, so they are not logged or shared with anyone.

Questions