How to Make 3D Printed Keycaps from Text

November 2, 2026 · T-KEYCAP STUDIO guide

If you are searching for how to make 3D printed keycaps, you can build one from text right in your browser, complete with a switch mount, and download a printable file. This guide walks through making a text keycap with T-Keycap Studio, from typing your letters to printing and fitting.

What T-Keycap Studio Is

T-Keycap Studio is a free, browser-based tool that turns typed text into a 3D keycap model. The lettered top button, the body, and the switch mount (Cherry MX compatible cross stem) are generated together, and the finished model can be downloaded as an OBJ or 3MF file for slicing and printing. There is no install and no sign-up — open T-Keycap Studio and start typing.

Step-by-Step: Making a Keycap

1. Type your text — up to 7 characters across 2 lines. Press Enter for a new line.
2. Choose a font — use the default (Jalnan 2) or upload your own TTF/OTF file. Korean Google Fonts for keycaps are also available.
3. Adjust letters — overall size is set automatically to fit the switch mounts. Letter-top rounding and a safe minimum for thin strokes are applied.
4. Shape the border and fill — smooth the border and use inner fill to close gaps between letters. Fill and overall size grow automatically when more mounting space is needed.
5. Split buttons (optional) — one shared body supports up to 4 independent buttons.
6. Add switches — add and place a switch per button. Each button needs at least one.
7. Style colors and ring — set preview colors, and choose whether to add a body ring and its direction.
8. Check the 3D preview — rotate, zoom, and pan to inspect the shape.
9. Download — save as OBJ or 3MF.

Fonts and Input Limits

You can upload your own TTF or OTF font file to use custom lettering. The text you type and the fonts you upload are processed only in your browser and are not sent to a server. For Google Fonts, enable the option, pick a font from the list, and click "Apply this font." Because text is limited to 7 characters across 2 lines, short, bold phrases print best.

Size, Buttons, and Switches

Overall size is determined automatically to fit the switch pocket, and the resulting width and height are shown below the preview. Stem sockets and switch pockets keep their original dimensions. With button splitting enabled, you can create up to 4 independent buttons using dividers between letters, and switches can be added or auto-placed per button. Positions that lack space are shown in red.

Colors, Ring, and Finishing

Colors in the color tab are for preview only; actual print colors are chosen in your slicer. You can add a ring to the body, with thickness set as a ratio of body height and a minimum of 1 mm maintained. Ring direction (top, left, right, bottom) and reinforcement are also adjustable.

OBJ vs 3MF: Which to Download

• OBJ: coordinates in millimeters. You can choose "one-shot" output (parts in place, kept as separate objects) or "print then assemble" (individual button and body OBJs placed on a print plate); OBJ files are saved as a ZIP. You can also choose which parts to download (all buttons + body, selected button, or body only).
• 3MF: millimeter units, with color materials and per-part filament slots. Slots are assigned by number regardless of color — 1 body/ring/top button base, 2 default letters, 3 extra color 1, 4 extra color 2 — and parts are laid out on a print plate.

Before downloading, check the preview and metrics, and use "coupling test print" to download a 24 mm coupon to verify fit first.

Privacy and Auto-Save

Everything runs in your browser, so your input is never sent to a server. Fonts are not sent to a server either. Your work is auto-saved in this browser, and you can also save and load projects manually. Saved project files may include the font used, so check the font's distribution and sharing terms.

3D Printer Tips

• Switch preparation: trim the bottom protrusion of the switch, then insert it into the body and fit the top button. Fit can vary by switch type and print conditions, so verify with the test coupon first.
• Test print: check fit using the 24 mm coupling coupon before the final print. Reference dimensions: cross-slot width about 4.11 mm, depth about 3.662 mm, body height 13.448 mm.
• Slicer: set units to millimeters. For OBJ, keep the files from the ZIP in the same folder when importing.
• Materials: PLA or PETG work well. PLA gives crisper detail for fine mounts; consider PETG when durability matters.
• Layer height and orientation: 0.1–0.15 mm layers are recommended for mount precision. Check orientation so supports do not form inside the cross slot.
• Clearance tuning: fit between body and button varies by printer and material. Confirm with a test print before final use.
• Post-processing: lightly cleaning burrs and leftover supports around the mount makes fitting easier.

Tips and Frequently Asked Questions

Tips

• Shorter phrases tend to be more stable. Use the 7-character limit wisely and verify thin strokes with a test print.
• Fonts with sturdier strokes are easier to print successfully.
• Use the size comparison feature (credit card and phone dimensions) to gauge real-world size.
• Splitting buttons into per-letter independent buttons makes assembly and replacement easier.

Frequently asked questions

• Do I need to install anything? No. It runs entirely in your browser.
• Is my text uploaded? No. Your input never leaves your browser.
• Which file formats are supported? OBJ (ZIP) and 3MF.
• Can I use my own font? Yes — upload a TTF or OTF file.
• What switch standard is used? Cherry MX compatible cross-stem dimensions. Trim the switch bottom protrusion before use.
• Is print success guaranteed? No. Closed shapes are calculated, but mount fit and actual print success should be confirmed with test prints.

Try the Tool

Make your own keycap right now in the browser: Open T-Keycap Studio