How do I add text to an STL file for free?

Upload your STL, type your text, pick a face, choose emboss (raised) or engrave (recessed), and download the modified STL. It runs entirely in your browser — no account, no upload, and no software to install.

Does this upload my STL to a server?

No. The model is loaded and modified locally in your browser using WebGL and a mesh boolean library. Your file never leaves your machine.

What's the difference between emboss and engrave?

Emboss adds the text as raised geometry on top of the surface (a boolean union). Engrave cuts the text into the surface as a recess (a boolean subtraction). Both export as a watertight-ish STL you can slice and print.

The boolean failed on my model — why?

Mesh booleans work best on clean, watertight models. Very broken or non-manifold STLs can fail or produce artifacts. Repair the mesh first, or try a smaller text depth so it clearly intersects the surface.

Add text or a logo to an STL

Drop in any STL, type your text, place it on a face, and emboss or engrave it — then download the modified STL. Personalize a model with a name, add a maker's mark, label a part. Free, all in your browser.

● Runs entirely in your browser — your STL is never uploaded

No STL handy? Load a sample: — real models are open-licensed (CC-BY / CC-BY-SA, credited below). Or upload your own.

Drop an STL here

or click to choose · loads & edits locally, nothing uploaded

Text

Letter spacing0

Face

Placement

Size8

Depth1.5

Move X0

Move Y0

Rotate0°

Mode

Attachment · chain / keyring point

Load an STL to begin.

Sample credits & licenses

The built-in samples are remixable open-licensed models — attribution and source below. Your customized export inherits the source license (CC-BY-SA samples require share-alike). Simple blank shapes are generated by this tool (no attribution needed).

Trophy / award base — Printables 429173 · CC-BY
Christmas name ornament — Printables 253402 · CC-BY-SA
Sports name plate — Thingiverse 7313594 · CC-BY-SA
House-number sign — Thingiverse 7313965 · CC-BY-SA
Standup desk sign — Printables 842202 · CC-BY-SA
Oval cookie cutter — Thingiverse 7366505 · CC-BY
Rectangle cookie cutter — Thingiverse 7364908 · CC-BY
Round coaster — Printables 768334 · CC-BY-SA
Leaf coaster — Printables 177276 · CC-BY-SA
Bookmark — Printables 704618 · CC-BY-SA
Dumbbell keychain — Printables 615893 · CC-BY-SA
Business-card case — Printables 48775 · CC-BY
Filament sample label — Printables 1707934 · CC-BY-SA
Light-switch cover — Printables 837459 · CC-BY-SA

How it works

Everything happens in your browser. Your STL is parsed with WebGL, your text is turned into real 3D geometry, and it is fused onto the surface with a mesh boolean — emboss is a union (raised text), engrave is a subtraction (recessed text). The result is exported straight back to an STL you can slice and print. Nothing is uploaded and nothing is stored. Booleans work best on clean, watertight models; if a broken mesh fails, repair it first or increase the depth so the text clearly crosses the surface.

Frequently asked

How do I add text to an STL for free?

Upload the STL, type text, pick a face, choose emboss or engrave, download. All in-browser — no account, no upload, no install.

Does it upload my STL?

No — the model is loaded and modified locally with WebGL and a mesh boolean. Your file never leaves your machine.

Emboss vs engrave?

Emboss = raised text (boolean union); engrave = recessed text (boolean subtraction). Both export as STL.

The boolean failed — why?

Booleans need reasonably clean, watertight meshes. Repair a broken STL first, or increase the text depth so it clearly intersects the surface.

Embed this tool

Free to embed on your own site or blog — each embed links back here.