BevelUp: Free Round Corner & Fillet Plugin for SketchUp

SketchUp’s 3D modeler still has no fillet or chamfer command for rounding the edges of a solid, so softening a corner usually means fighting with Follow Me or buying a paid extension. (SketchUp 2026 did add Fillet and Chamfer tools — but only inside LayOut, for 2D vector linework, not for 3D geometry.) BevelUp fixes the 3D side with a free round corner plugin: select edges, set a radius, and get clean rounded geometry in one click — on simple box edges and complex multi-edge corners alike. It is a genuinely free round corner plugin for SketchUp — no license key, no trial, no feature limits.

Fredo6’s classic RoundCorner (v2.6a) is still free, while its newer successor FredoCorner is a paid extension after the trial. BevelUp is a lightweight, fully free round corner and chamfer plugin for SketchUp — no license key needed.

BevelUp SketchUp — Video Demo

Fillet vs. chamfer — what BevelUp does

Both soften a sharp edge, but the result is different:

• Fillet (round) — replaces the edge with a smooth curved arc. More segments make the curve smoother. This is the typical “rounded corner”.
• Chamfer (bevel) — replaces the edge with a single flat angled cut. In BevelUp you get a chamfer simply by setting Segments = 1.

Same tool, same radius control — you choose whether the edge ends up curved or flat. One detail worth knowing: every extra segment multiplies the new faces and edges along the whole selection, so rounding a long edge loop at a high segment count can balloon the polygon count of an otherwise light model — keep segments at 2–3 for anything you will copy or array many times.

How to round or chamfer edges in SketchUp with BevelUp

1. Select the edges you want to round — one edge, a closed loop around a face, or several edges at once.
2. Click the BevelUp toolbar button.
3. Set the radius and the number of segments (1 = chamfer, more = smoother fillet).
4. Apply. BevelUp builds native faces and keeps your existing materials.

The radius is capped by the geometry, not by what you type: if you ask for a fillet larger than half the length of the shortest adjoining edge, the corners would overlap and the result fails. When a round “won’t take”, shrink the radius or pre-split tight edges first — the tool is doing math, not refusing.

Features

• Round mode — smooth arc fillet across multiple segments. More segments = smoother curve.
• Chamfer mode — flat angled cut (set Segments = 1). Same radius control, flat result instead of a curve.
• Closed edge loops — the full perimeter of a face rounds uniformly in one operation.
• Open edge chains — partial selections that stop at a model boundary work just as well.
• Complex corners — vertices where 4 or more edges meet are handled correctly, not just standard 3-edge box corners.
• Materials preserved — original face textures and materials transfer to the new filleted faces automatically. No re-painting.
• Re-editable output — native SketchUp edges and faces. Continue modeling, push/pull, or paint after rounding.

Rounds complex corners cleanly

BevelUp resolves vertex cases that usually break a rounding tool — not just simple box corners:

On a curved fillet, BevelUp softens and smooths the new across-arc edges so the curve shades as one continuous surface instead of showing facet lines — but the seam edges where the fillet meets the original flat faces are left hard on purpose, so the model still reads as crisp and stays measurable.

BevelUp vs. other round corner options

	BevelUp	RoundCorner / FredoCorner	Bevel (Mind Sight)	Follow Me (native)
Price	Free	RoundCorner free; FredoCorner paid	Paid	Free
License key	None	FredoCorner: required	Required	None
Workflow	Select edges → one click	Select edges → dialog	Select edges → live edit	Draw a profile and trace each path manually
Fillet + chamfer	Yes (Segments control)	Yes	Yes	Manual only
Keeps materials	Yes	—	—	No

Comparison reflects publicly available information in 2026; check each vendor for current pricing. Prefer the native route for a single sweep? See our Follow Me guide and the older RoundCorner extension walkthrough.

Install

⬇ Download

1. In SketchUp: Window → Extension Manager → Install Extension.
2. Select the downloaded bevelup.rbz file and accept the prompt.
3. Restart SketchUp. A BevelUp entry appears under Extensions and a one-button toolbar.

Requirements

• SketchUp 2022 or newer (including SketchUp 2026).
• Windows or macOS.
• A free 3dshouse account is required to sign in (it does not limit any features). The plugin dialog loads online, so an internet connection is required.

FAQ

Is BevelUp a free alternative to RoundCorner / FredoCorner for rounding edges in SketchUp?
Yes. Fredo6’s original RoundCorner (v2.6a) is still free, but its successor FredoCorner is paid after the trial. BevelUp gives you free fillet and chamfer in SketchUp — no license key, no trial period, no feature limits.

What is the difference between a fillet and a chamfer?
A fillet is a curved (rounded) edge; a chamfer is a flat angled cut. BevelUp does both — set Segments to 1 for a chamfer, or higher for a smooth fillet.

Can I round several edges or a whole face at once?
Yes. BevelUp handles single edges, closed loops around a face, open edge chains, and complex corners where 4+ edges meet — all in one operation.

Does it keep my textures and materials?
Yes. Original face materials transfer automatically to the new rounded faces, so there is no re-painting.

Doesn’t SketchUp 2026 already have Fillet and Chamfer tools?
Those new 2026 tools live in LayOut and only work on 2D vector linework for documentation. They do not round the edges of 3D geometry, which is what BevelUp does in the SketchUp modeler.

How is this different from Follow Me?
Follow Me requires manually drawing a profile, positioning it, and tracing a path — edge by edge. BevelUp rounds any selection of edges in one operation, handles closed loops and corners automatically, and preserves materials.

Does it work on imported or CAD geometry?
BevelUp works on native SketchUp edges and faces. For messy imported meshes, clean up and weld the geometry first for the best result. Need to lighten a heavy import? Try Decimify.

Can I use the output for 3D printing?
Yes. BevelUp produces native SketchUp faces — solid, re-editable, and export-ready for any format SketchUp supports.

Which SketchUp versions are supported?
SketchUp 2022 and newer, on Windows and macOS.