Sell 3MF Files Online —
Keep 100% of Every Sale
Proofly is the only 3D marketplace that charges 0% commission. Upload your 3MF files — multi-material prints, tabletop miniatures, functional parts — set your price, and every dollar goes directly to you. Buyers pay a flat $1 platform fee. Every download is automatically watermarked with HiddenMark. Bambu Lab, PrusaSlicer, and Cura profiles supported.
How much do you keep per sale?
Commission rates vary across 3D print marketplaces. On a $10 multi-material 3MF file, here is what you actually receive after each platform takes its cut:
| Platform | Commission | You keep on $10 sale |
|---|---|---|
| Proofly | 0% | $10.00 |
| Cults3D | 20% | $8.00 |
| MyMiniFactory | 10–20% | $8.00–$9.00 |
| CGTrader | 30–35% | $6.50–$7.00 |
| Pinshape | 40% | $6.00 |
| Gumroad | 10% | $9.00 |
| Patreon | 5–12% (subscription) | varies |
* Stripe processing fee (~2.9% + $0.30) applies on all platforms. Proofly charges no platform commission on top of this. Rates correct as of 2026; check each platform for current terms.
Why 3MF is replacing STL as the standard print format
STL has been the default 3D printing format since the 1980s. 3MF, developed by the 3MF Consortium (Microsoft, Autodesk, Ultimaker, Stratasys, HP), fixes every major limitation:
| Feature | STL | 3MF |
|---|---|---|
| Multi-material / multi-color | ❌ No | ✅ Native |
| Embedded print settings | ❌ No | ✅ Yes |
| Scale / unit preservation | ❌ Ambiguous | ✅ Exact |
| File size vs equivalent STL | Baseline | ~50–70% smaller |
| Bambu Lab AMS support | ❌ No | ✅ Native |
| Thumbnail in slicer | ❌ No | ✅ Yes |
As Bambu Lab grows to become the market-leading consumer 3D printer brand, 3MF adoption among buyers is accelerating. Creators who offer 3MF files — especially with multi-material AMS configurations pre-set — command a price premium and receive fewer support requests.
Why 3D print designers sell 3MF files on Proofly
0% commission — your price is your revenue
Every major 3D print marketplace takes 10–40% of each sale. Proofly takes nothing. On 100 sales of a $12 multi-material 3MF file, Cults3D takes $240 at 20%; Proofly takes $0. That gap compounds: at 500 sales/year, the difference is $1,200 vs $0 in platform commission.
In-browser 3D preview — buyers see before they buy
Proofly's viewer renders your 3MF model in-browser with orbit, zoom, and pan. Buyers can inspect geometry, check layer orientation, and examine detail before purchasing — reducing disputes and refund requests. Solid, wireframe, clay, and X-ray display modes let buyers evaluate mesh quality the same way you would in a slicer preview.
HiddenMark watermarking — trace every leaked file
3D print file piracy is common: files shared in Discord servers, Telegram groups, and re-upload sites. Proofly embeds an invisible HiddenMark code into the mesh geometry of every 3MF download — unique per buyer. If your file appears on a sharing site, upload it to the verifier to identify the exact purchase. DMCA certificate included.
Bundle 3MF + STL + slicer profiles in one listing
Pack your 3MF (with embedded AMS/MMU color assignments), STL fallback, PrusaSlicer .ini profile, and Bambu Studio .3mf project — all in one ZIP. Buyers get the complete tested print package in a single transaction. Bundled listings command $3–$8 more than bare-file STL listings of equivalent geometry.
AI listing generation — publish in minutes
Click "Generate description" and Claude AI writes your listing title, description, and tags based on your file name and category. Your listing is automatically translated into 20 languages — Japanese, German, Spanish, French, Chinese — so makers worldwide find your 3MF files. A complete listing takes under 5 minutes to publish.
How to start selling 3MF files on Proofly
- 1
Create a free account
Sign up at proofly.store/register. No subscription, no upfront cost. Set up your creator profile with a bio, print specialization (tabletop, functional, decorative, cosplay), and social links.
- 2
Connect Stripe to receive payments
Go to Dashboard → Earnings → Connect Stripe. Takes about 5 minutes. Earnings transfer directly to your bank account or debit card on your chosen schedule (weekly or monthly).
- 3
Upload your 3MF files
Drag your 3MF (or a ZIP bundle with STL + slicer profiles) into the upload form. The viewer automatically renders the model. Add your price and publish — or use the AI description generator to write listing copy instantly.
- 4
Each download is automatically watermarked
When a buyer purchases, Proofly embeds a unique HiddenMark code into their copy. No action required from you. If the file is shared without authorization, you can trace exactly which purchase it came from.
- 5
Track analytics and get paid
Dashboard → Analytics shows views, purchases, conversion rate, and buyer geography per model. Stripe pays out on your schedule. See which print categories perform best and refine your catalog over time.
What 3MF categories sell best
3MF's multi-material and embedded-settings capabilities make certain categories especially profitable for early creators on the format:
Proofly vs Cults3D and MyMiniFactory for 3MF files
Cults3D: 20% commission + no per-buyer watermarking
Cults3D charges 20% of every sale. On 200 sales of a $10 3MF file, you lose $400 to commission. Cults3D also does not embed per-buyer watermarks, so you cannot trace leaked files. Proofly charges 0% and watermarks every download. Many creators list on both — but Proofly's zero-commission model makes it the higher-margin channel for each sale.
MyMiniFactory: 10–20% + moderation delays
MyMiniFactory charges 10–20% and has a moderation queue. Proofly publishes immediately with no review delay. MyMiniFactory's Tribes subscription product is a strong feature for established creators — but for individual model sales at zero commission, Proofly is more profitable per transaction.
Printables (Prusa): free listing, no paid sales
Printables is a free download site — you cannot charge for files. It drives visibility but no direct revenue. Use Printables for free teaser files and link buyers to your Proofly listings for the premium, print-tested 3MF with slicer profiles. Cross-listing a free STL on Printables with a paid 3MF bundle on Proofly is a proven creator strategy.
Frequently asked questions
What percentage do I keep when I sell 3MF files on Proofly?
You keep 100% of your listed price. Proofly charges 0% commission. Buyers pay a flat $1 USD platform fee per order. Compare this to MyMiniFactory at 10–20%, Cults3D at 20%, CGTrader at 30–35%, or Pinshape at 40%. On a $10 multi-material 3MF file, you receive $10 (minus Stripe's ~$0.59 processing fee) instead of losing $1–$4 to platform commission.
Why sell 3MF instead of STL?
3MF is the next-generation 3D printing format that solves core limitations of STL. 3MF stores per-face color and multi-material data natively, preserves scale and units precisely (no more 'is this millimeters or inches?'), includes printer profile and slicer settings directly in the file, supports thumbnails for preview, and results in smaller file sizes than binary STL for complex geometry. Bambu Lab's Bambu Studio, PrusaSlicer, Cura, OrcaSlicer, and Chitubox all support 3MF. Buyers who use multi-material printers (Bambu Lab AMS, Prusa MMU) increasingly prefer 3MF listings over STL.
Can I sell both 3MF and STL in the same listing?
Yes. The recommended approach is to bundle both formats — 3MF as the primary file with embedded color/material data, STL as a universal fallback for older slicers — in a single ZIP archive. Buyers get both with one purchase. Listings that include 3MF + STL + a print-tested slicer profile consistently command $2–$5 more per sale than STL-only listings, because the 3MF file gives buyers a tested, ready-to-slice experience.
How are my 3MF files protected from piracy?
Every purchase is automatically protected by HiddenMark — an invisible watermark embedded in the mesh geometry of each 3MF file. Each buyer receives a uniquely coded copy tied to their purchase. If your 3MF file appears on a sharing site, Thingiverse rip-off, or piracy forum, upload it to proofly.store/hiddenmark to identify the exact purchase it came from. A DMCA-ready certificate with proof of authorship is generated immediately — no extra steps required.
Can I include Bambu Studio and PrusaSlicer profiles in my 3MF listing?
Yes. Proofly supports any files packed into a ZIP archive, including .3mf, .stl, .ini (PrusaSlicer profiles), and text documentation. You can bundle your 3MF file with a Bambu Studio project file (.3mf with embedded print settings), a PrusaSlicer .ini profile, and a README with print recommendations — all in one download. Many top-selling 3D print creators include tested slicer profiles as a key selling point, since they eliminate trial-and-error for buyers.
Do I need exclusivity to sell 3MF files on Proofly?
There is no exclusivity requirement on Proofly. You can sell the same 3MF asset on Cults3D, MyMiniFactory, Printables, Thangs, and Proofly simultaneously. Many 3D print creators use Proofly as a zero-commission primary storefront while keeping existing platform listings live. Or they list on Proofly at a slightly lower price to capture price-comparing buyers — since there is no commission, the math still works in their favor.
What 3MF categories sell best for 3D printing creators?
Top-selling 3MF categories include: tabletop miniatures and RPG terrain (multi-material with pre-colored parts), functional prints with tight tolerances (threaded inserts, snap-fit assemblies), multi-color decorative models (vases, figurines, lithophanes), cosplay armor and prop pieces with pre-set wall thickness and supports, maker tools and organizers, and architectural scale models. Multi-material 3MF files — those that use Bambu AMS or Prusa MMU for color — command a significant premium over single-color equivalents.
How do I get paid for my 3MF sales?
Connect your Stripe account during onboarding — takes about 5 minutes. When a buyer completes a purchase, Stripe transfers the sale amount directly to your Stripe account. Configure automatic weekly or monthly payouts to your bank account or debit card. Proofly never holds your money — earnings flow directly from buyer to your Stripe account via Stripe Connect. View your sales, revenue by model, and buyer geography in Dashboard → Analytics.
More from Proofly
The 3D printing creator guide — FDM, resin, miniatures, and functional prints.
Complete guide to all formats — STL, GLB, OBJ, FBX, 3MF, and bundles.
How HiddenMark mesh watermarking works — trace leaks back to the source purchase.
See live 3MF listings with color, material, and print settings data — next-gen print format.
Sell by format
Start selling your 3MF files today
Free account, 0% commission, in-browser 3D preview, automatic piracy tracing. Upload your first 3MF file in under 5 minutes.
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