Free 3D Stamp Maker
& Stamp STL Generator

Getting the best print quality

• Dry TPU 8h at 65°C before printing — moisture causes stringing that fills in fine text. This is the #1 cause of failed stamp prints. A food dehydrator works perfectly.
• Print at 20–30mm/s. TPU is flexible and jams at high speed
• Use 0.1mm layer height (not 0.15mm) for text stamps — the difference is visible
• A 0.2mm nozzle dramatically improves small text — letters under 5mm become crisp where a 0.4mm nozzle fails
• Enable ironing on the top surface (2% flow) in your slicer for the smoothest stamp face
• 95A TPU is easiest to print. For softer stamps try Fiberflex 40D or VarioShore TPU
• Sand the stamp face with 400-grit for better ink uptake — for TPU, wet sand (a little water on the paper) to prevent the sandpaper from clogging and going fuzzy
• Flatness check: color the stamp face with a Sharpie marker, then sand in a figure-8 pattern on a flat surface. Stop when all marker is gone — any remaining ink shows a high spot
• PLA stamp still rough? Coat the face with a few thin layers of Plasti-dip or clear nail polish — adds grip texture and seals the layer gaps so more ink stays on the surface

Design tips

• Keep text at least 4–5mm tall — smaller than that and most FDM printers lose detail
• Use Bold Block or Rounded Bold for FDM — thin-stroke fonts (serifs, Typewriter) lose detail below 8mm letter height
• For logos, high-contrast black and white works best — avoid gradients or halftones
• Leave at least 2mm of margin between text and the border
• Arc text works great for names, dates, or "Made with love" around a circle stamp
• For address stamps, a wider rectangle (70×30mm+) fits more text comfortably

Ink & stamping technique

• Water-based ink pads (StazOn, Versacraft) work well with TPU — use 1.5–2mm relief
• Oil-based pads need slightly deeper relief (2–2.5mm) to hold enough ink
• Prime a new stamp by pressing it on a VersaMark clear watermark pad before first use — the residue helps regular ink adhere more evenly on the next stamp
• Place a soft mat (silicone baking mat, mousepad, folded felt) under the paper when stamping — the give compensates for any slight unevenness in the stamp face
• Press straight down with even pressure — rocking causes blurry edges
• Re-ink every 2–3 stamps for consistent results
• Clean with a baby wipe or damp cloth immediately after use
• PLA stamps work too with acrylic craft paint applied by brush

Printer compatibility

Works with any FDM printer. STL is the universal format — just import into your slicer.

• Direct drive extruders handle TPU better than Bowden setups
• Bambu: load TPU externally — not through AMS (except AMS HT)
• Elegoo Centauri Carbon: direct drive, handles TPU well at 30mm/s
• Resin (MSLA/SLA): mix 80% flexible + 20% standard resin — prints reliably, true rubber feel. Don't over-cure or it goes brittle.

FDM Printers

Any FDM printer works. These are the most popular for stamp-making.

TPU Filament

95A TPU gives the best stamp feel. Dry it 8h at 65°C before printing.

PLA Filament

For rigid stamps painted with acrylic — or for handles.

Filament Dryers

Essential for TPU. Wet filament causes stringing that ruins stamp detail.

Ink Pads & Paint

Water-based pads work great with TPU. Brush-on acrylic for PLA stamps.

Hardware & Tools

For attaching handles or finishing prints.

Which printer is right for you?

The single biggest factor is how small your text needs to be.

• Choose FDM if your letters are 5mm+ tall, you already have a filament printer, and you want a simple one-step workflow. Text stamps, address stamps, bold logos — all work great.
• Choose resin if you need fine detail: small text (under 4mm), intricate logos, thin line art, or you want results that look like a commercial photopolymer stamp.
• FDM is easier — load TPU, print, done. Resin requires washing and UV curing but rewards you with dramatically sharper detail.
• Don't have a resin printer? Many local libraries, makerspaces, and print services offer MSLA printing.

Minimum detail — what's achievable

A 0.2mm nozzle on FDM roughly halves the minimum — small text that blobs at 0.4mm becomes crisp at 0.2mm.

FDM stamp tips

• Material: TPU 95A is the standard. Fiberflex 40D and VarioShore TPU are softer and hide layer lines better — ideal for small text. PLA works for craft-paint-only stamps.
• Font matters: Use Bold Block or Rounded Bold. Thin-stroke fonts (serifs, Typewriter) lose detail below 8mm letter height — strokes fall below the 1.2mm nozzle minimum.
• Speed: 20–30mm/s. Faster speeds cause stringing that fills in letter gaps. This is non-negotiable for fine text.
• Dry your filament: 8h at 65°C before printing. Moisture is the #1 cause of failed text stamps — it causes stringing that closes up small letters.
• Layer height: 0.1mm. The difference between 0.1mm and 0.15mm is visible in small text.
• Enable ironing on the stamp face in your slicer for a smoother ink surface.
• Sand lightly with 400-grit after printing — improves ink uptake on any FDM stamp.
• First layer settings for smoother face: raise nozzle temp +5–10°C for the first layer, drop first layer speed to 15–20mm/s, and set first layer extrusion width to 120% — this fills surface gaps and gives a flatter stamp face right off the printer.
• Filler primer for visible lines: spray 2–3 light coats of filler primer (e.g. Rust-Oleum 2-in-1 Filler & Sandable), letting each coat dry 15–20 min. Wet sand with 400–800 grit between cycles. Two cycles is usually enough. Be careful not to sand away fine relief detail — use light pressure on the stamp face.

Resin stamp tips

• The 80/20 trick: Mix 80% flexible resin + 20% standard resin. Prints as reliably as regular resin but has real rubber flex. Pure flexible resin alone takes many failed prints to dial in — don't start there.
• Good flexibles: Siraya Tech Tenacious, Liqcreate Flexible-X, RESIONE F39, Formlabs Flexible 80A, Prusament Flex.
• Orientation: Flat on build plate, face pointing away from the build platform. No supports needed. The FEP film gives the face a naturally smooth finish — no sanding required.
• Don't over-cure: Stop UV exposure as soon as the surface is no longer tacky. Over-curing turns flexible resin brittle and rigid. This is the most common mistake.
• Wash & cure: 2–5 min in IPA, then 5–10 min under 405nm UV. Uncured resin will degrade your ink pads.
• Flex prints curl: Attach to a PLA handle or acrylic block before use — flexible resin stamps won't lay flat on their own.
• Handle uncured prints carefully — they're extremely fragile before washing.