# 3D Fosil > 3D Fosil is a web-based 3D printing platform that checks STL, 3MF and OBJ models against your own printer and slices them into printer-ready G-code with a proven open-source slicing engine, without installing desktop software. 3D Fosil runs entirely in the web browser at https://3dfosil.com/. Users upload a model, choose one of their saved printers and get a risk report or printer-ready G-code. Accounts are free to create; paid packages add monthly tokens and AI print setup. ## Key facts - Product type: web-based 3D printing platform (STL analysis and online slicer) - Input formats: STL, 3MF and OBJ - Output: G-code for FDM printers, with a layer-by-layer toolpath preview - Print settings: close to 600, from Basic to Expert visibility - Installation: none; works in current desktop browsers - Where slicing runs: in the user's own browser (CuraEngine compiled to WebAssembly), so model files stay on their computer; phones and low-memory devices use the 3D Fosil slicing server - Printer catalogue: 11 brands and 47 models, plus custom printers ## Capabilities - STL risk analysis: Measure dimensions, volume and overhangs, check that the mesh is watertight and that it fits your printer, then get print time, filament and cost from a real slice. - Pro-grade slicing: Slice with close to 600 print settings from Basic to Expert visibility. Derived values update automatically when you change a parent setting. - Your printers, saved: Save printer setups with build volume, nozzle, material and start/end G-code. Every analysis and slice uses the machine you choose. - Layer-by-layer preview: Inspect walls, infill, skin, supports and adhesion in a 3D toolpath preview before you download the G-code. ## Pages - [Home](https://3dfosil.com/): overview, features, pricing and FAQ - [What is 3D Fosil?](https://3dfosil.com/what-is-3d-fosil): 3D Fosil combines pre-print model analysis and a full slicer in one browser workspace, tied to the printers you save in your account. - [STL Analysis](https://3dfosil.com/solutions/stl-analysis): An STL analysis in 3D Fosil reports dimensions, build volume fit, mesh watertightness, overhang area, support share, print time, filament weight and material cost for a chosen printer. - [Online Slicer](https://3dfosil.com/solutions/online-slicer): The 3D Fosil online slicer offers close to 600 print settings in Basic, Advanced and Expert views and exports G-code for the printer you select. - [Makers & Workshops](https://3dfosil.com/solutions/makers-and-workshops): 3D Fosil lets a maker or workshop save up to 10 printer setups per account, check models before printing, and slice for any of those printers from a browser. - [Supported Printers](https://3dfosil.com/supported-printers): Every profile includes the printer's build volume, filament diameter, G-code flavor and a start and end G-code script with heating, homing and a purge line. Don't see your printer? Add a custom printer with your own values. ## Pricing - Free (free): 10 tokens per month (1 STL analysis); 2 saved printers; 5 history entries; Full print settings (close to 600); G-code export - Starter ($4.99 per month): 150 tokens per month (~15 STL analyses); 10 saved printers; 20 history entries; Full print settings (close to 600); G-code export - Maker ($9.99 per month): 400 tokens per month (~40 STL analyses); 10 saved printers; 20 history entries; Full print settings (close to 600); G-code export - Pro ($19.99 per month): 1,000 tokens per month (~100 STL analyses); 10 saved printers; 20 history entries; Full print settings (close to 600); G-code export - Studio ($39.99 per month): 2,500 tokens per month (~250 STL analyses); 10 saved printers; 20 history entries; Full print settings (close to 600); G-code export ## Supported printer brands - [Anycubic](https://3dfosil.com/supported-printers/anycubic): Kobra 2, Kobra 2 Max, Kobra 2 Pro, Kobra 3, Vyper - [Artillery](https://3dfosil.com/supported-printers/artillery): Genius Pro, Sidewinder X2, Sidewinder X4 Plus - [Creality](https://3dfosil.com/supported-printers/creality): CR-10 Smart Pro, Ender-3, Ender-3 S1, Ender-3 S1 Pro, Ender-3 V2, Ender-3 V3, Ender-3 V3 KE, Ender-3 V3 SE, Ender-5 S1, K1, K1 Max, K1C - [Elegoo](https://3dfosil.com/supported-printers/elegoo): Neptune 3 Pro, Neptune 4, Neptune 4 Max, Neptune 4 Plus, Neptune 4 Pro - [FlashForge](https://3dfosil.com/supported-printers/flashforge): Adventurer 5M, Adventurer 5M Pro - [Prusa](https://3dfosil.com/supported-printers/prusa): Core One, MINI+, MK3S+, MK4, MK4S, XL - [Qidi Tech](https://3dfosil.com/supported-printers/qidi-tech): Plus4, Q1 Pro, X-Max 3, X-Plus 3 - [Raise3D](https://3dfosil.com/supported-printers/raise3d): E2 - [Sovol](https://3dfosil.com/supported-printers/sovol): SV06, SV06 Plus, SV07, SV08 - [Ultimaker](https://3dfosil.com/supported-printers/ultimaker): 2+ Connect, S3, S5 - [Voron](https://3dfosil.com/supported-printers/voron): Voron 2.4 350, Voron Trident 300 ## Frequently asked questions ### What is 3D Fosil? 3D Fosil is a web-based 3D printing platform that checks STL, 3MF and OBJ models against your own printer and slices them into printer-ready G-code with a proven open-source slicing engine, without installing desktop software. ### How does 3D Fosil slice models? 3D Fosil slices on its servers with a proven open-source slicing engine and close to 600 print settings. Derived values such as wall speeds and infill line distance are calculated from the settings you change, so the slice always matches your choices. ### Which file formats can I upload? You can upload STL, 3MF and OBJ files. 3MF and OBJ models are converted to a single mesh in the browser before slicing. ### Which 3D printers are supported? 3D Fosil ships with profiles for printers from Creality, Prusa, Anycubic, Elegoo, Sovol, Artillery, FlashForge, Qidi Tech, Voron, Raise3D and Ultimaker, and you can add a custom printer with your own build volume and start G-code. Bambu Lab printers are not supported yet. ### Is 3D Fosil free? Yes. The Free package includes 2 saved printers, 5 history entries, full print settings, G-code export and 10 tokens per month, enough for one STL analysis. Paid packages start at $4.99 per month. ### What are tokens used for? Tokens pay for analysis features. An STL analysis costs 10 tokens. Monthly package tokens renew with each 30-day period. Add-on tokens never expire and can be used while you have an active paid package. Tokens are refunded automatically if an analysis fails. ### Does 3D Fosil send G-code to my printer? Not yet. 3D Fosil produces a G-code file that you download and print from an SD card, USB or your printer's web interface such as OctoPrint, Mainsail or Fluidd. ## Optional - [Full text of every public page](https://3dfosil.com/llms-full.txt): the same content as the pages above, as plain text - [Terms of Service](https://3dfosil.com/terms) and [Privacy Policy](https://3dfosil.com/privacy): slicing runs in the user's browser by default, so model files stay on their computer - [Open-source software](https://3dfosil.com/open-source): the CuraEngine slicing engine (AGPLv3) and its source - [Site map](https://3dfosil.com/sitemap) and [sitemap.xml](https://3dfosil.com/sitemap.xml)