CSS Border Image Generator

Keep a normal border style as a fallback and remember that the border shorthand can reset border-image longhands.

Start color

End color

Angle

Repeat

Slice

Border width (px)

Outset (px)

Border-image preview

Generated CSS—

Production CSS handoff

Review the CSS you will actually ship

This panel stays locked until you review the generated output above. It checks output shape, feature dependencies, motion/fallback concerns and creates a copy-ready component handoff.

Waiting for generated CSS

Output shapeLocked

Declarations—

UTF-8 bytes—

Browser preflightGenerate first

Features detected

Production findings

Copy-ready handoff

Generated component handoff will appear here.

Browser support is checked against the browser running this page, not every browser you support. Treat this as a production preflight, then test the copied CSS in your real component, content, cascade and target browser matrix.

Four-side border-image studio

Move beyond one slice value: set top/right/bottom/left slices independently, choose horizontal and vertical repeat modes, toggle fill, and see the generated gradient border on a live browser-rendered preview.

Slice topSlice rightSlice bottomSlice leftRepeat XRepeat YFill center

—Slice shorthand

—Repeat pair

—Border width

—Outset

Ready.

The preview uses the main tool’s current gradient source, angle, border width and outset. For raster nine-slice artwork, inspect the actual image dimensions before choosing numeric slices.

What this CSS result proves

Generated CSS should be judged by the real output, not just the controls.

What to review before production

Copy the output into the actual component, test its layout/content extremes, and review browser support, fallbacks and accessibility before production use.