Round, Fillet or Chamfer SketchUp Edges in Seconds — Free, Textures Kept

Get BevelUp on Extension Warehouse (free) →

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 free round corner plugin for SketchUp — every feature is free for 3 rounds per day, with no license key and no trial.

Fredo6’s RoundCorner is a paid extension ($15 perpetual license, 3 seats) and its newer sibling FredoCorner costs $30 (3 seats); both need LibFredo6. BevelUp is a lightweight round corner and chamfer plugin for SketchUp — free to use, 3 rounds per day. No license key to install.

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.
• Any edge count at a corner — 3, 4, 5 or more edges meet at one vertex: box corners, pyramid and cone apexes.
• Open corners — more edges than faces: single sheets, boxes without a lid, chains ending at the model boundary.
• Concave corners — inside corners of L- and U-shaped solids, notches and pockets.
• 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 any corner: 3 to n edges, open and concave

One selection, two controls — Radius and Segments — and one Round button. Whatever the corner is, you do not switch tool or pick a mode:

• Any number of edges at a corner — 3 (a plain box corner), 4, 5 or more: the apex of a pyramid or a cone, or any hub where many edges meet. Every corner in the selection is rounded in the same pass.
• Open corners — corners with more edges than faces: a single sheet, a box with its lid removed, or an edge chain that stops at the model boundary. The open side rounds like a closed one.
• Concave corners — the inside corners of L- and U-shaped extrusions, notches and pockets round as cleanly as outward ones.

Other SketchUp rounding plugins do not handle every one of these corner types in a general way; BevelUp covers all of them with the same two controls.

All three cases, as they come out of SketchUp:

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.

When BevelUp can’t round: invalid selections and errors

BevelUp checks the selection before it builds anything. If a Round is refused, the message under the buttons says what is wrong, nothing in the model changes and the Round does not use up one of your daily free rounds.

Message in the dialog	What it means	What to do
Shapes touch at a corner here	Two shapes meet at a single point, or a third face joins at that corner, so the faces around it do not form one clean fan.	Pick edges away from that corner, or separate the shapes.
3 or more faces on N edges	An edge shared by three or more faces (non-manifold), for example a wall that ends on the edge of a box.	Pick edges that belong to a single shape.
Open surface at N edges	The edge has only one face, because the surface has a hole or is the border of a loose sheet.	Close the hole, or pick edges where two faces meet.
N edges lie flat	The two faces on the edge are coplanar, so it is a line across a flat area, not a corner.	Pick edges where two faces meet at an angle.
No face on these edges	The selection holds loose edges (guide lines, curves) with no face.	Select edges that border faces.
Radius too small for SketchUp to build	The new faces would be smaller than SketchUp can create.	Use a bigger Radius.
Radius too large here — up to X fits	The Radius is wider than the faces next to the edge (for two parallel edges on one face: more than half the gap between them), so the new surface would run outside the shape. The message gives the largest Radius that fits.	Type a Radius at or below that number.
Too many edges picked / N segments is too much	The Radius is fine, but the result would be too heavy to build in one go.	Round fewer edges at a time, or lower Segments to the number the message suggests.

Partly valid selection. When only some of the picked edges are a problem, BevelUp rounds the rest and shows Skipped N edges with the reason. The skipped edges are left selected, so you can see which they are and fix them.

Radius too large. BevelUp measures the Radius along the faces beside each edge, so it cannot be wider than those faces. A Radius that is too big is refused before anything is built, with the largest value that fits in the unit you are using. Exception: on a concave face the check only catches the obvious cases, so if a rounded edge still looks wrong, undo and try a smaller Radius.

BevelUp vs. other round corner options

	BevelUp	RoundCorner / FredoCorner	Bevel (Mind Sight)	Follow Me (native)
Price	Free (3 rounds/day)	RoundCorner $15; FredoCorner $30	$49	Free
Seats per license	No limit (per account)	3 seats	Not stated	—
License key	None	Required (Sketchucation SCFLicense)	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
Any corner: n edges, open, concave	Yes, one operation	Not every case	Not every case	Manual, corner by corner
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

⬇ Get it on Extension Warehouse

1. Open the link above, sign in with your Trimble ID and click Install.
2. Or install without leaving SketchUp: Extensions → Extension Warehouse, search BevelUp, click Install.
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. Every feature is free for 3 rounds per day. 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, within a daily limit. RoundCorner ($15) and FredoCorner ($30) are paid Sketchucation licenses covering 3 seats each, after a free trial. BevelUp gives you fillet and chamfer with materials preserved, free for 3 rounds per day — no license key and no trial.

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.

Can BevelUp round corners with more than three edges, open corners and concave corners?
Yes. A corner can have 3, 4, 5 or more edges, can be open (more edges than faces, like a single sheet or a box without a lid) and can be concave (the inside corner of an L- or U-shaped extrusion). Select the edges, set Radius and Segments, press Round — there is no separate mode for each case. Other SketchUp rounding plugins do not handle every one of these corner types in a general way.

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.