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Convert CAD parts with STEP to STL Converter, a local stp to stl tool for .step & .iges. Set mesh quality, save binary or ASCII STL. 🪝 STEP to STL Converter: turn any .step or .stp part into a clean, print-ready mesh right inside Chrome STEP to STL Converter is a local converter that opens a .step, .stp, .iges, or .igs part and saves it as an STL for 3D printing, with no upload and no web queue to wait on. Drop in a CAD part, preview the mesh, set the quality, and download. It works online in your browser but runs 100% locally, so your files never leave your computer. 🚀 Quick start: 1. Install STEP to STL Converter, then click "Add to Chrome" 2. Open a .step, .stp, .iges, or .igs file by drag and drop, the picker, or straight from a ZIP or RAR archive 3. Pick a mesh quality and check the live 3D preview 4. Click Download and save a binary or ASCII STL Here are 🔟 reasons makers pick this step to stl converter: 1️⃣ Converts .step, .stp, .iges, and .igs parts, a true step file to stl tool with no CAD suite 2️⃣ Runs the whole convert step to stl job on your machine, nothing is uploaded 3️⃣ Live 3D preview shows the exact mesh before you download, no blind conversion 4️⃣ Quality control from Fast to Fine, so you trade smoothness against file size on purpose 5️⃣ Custom linear and angular deflection for a mesh your slicer will like 6️⃣ Binary or ASCII STL, whichever your slicer expects 7️⃣ Merge an assembly into one file, or save separate parts as a ZIP 8️⃣ Rename any body and download a single part on its own 9️⃣ Handles stp to stl and iges to stl with the same one-click flow 🔟 Opens from a ZIP or RAR archive, and works as a side panel or a full tab 🖨️ Built for the slicer, not the cloud ➤ A supplier or a CAD seat hands you a .step file, and your slicer chokes on it or renders it faceted. This tool tessellates the part cleanly and hands Cura, PrusaSlicer, or Bambu Studio a mesh that just loads. ➤ Convert stp to stl and step file to stl on your own computer, so a confidential part never rides through a random online stl converter. ➤ A fast stl file converter and handy 3d file converter for prototyping: open the part, set the quality, download, slice. 🔒 Private by design Most online converters make you upload the model to their server first. This step to stl converter never does: every .step, .stp, or .iges file is parsed and meshed on your own computer, offline from the moment it loads. No account, no server, no cloud copy, which matters when a part sits under an NDA. It is a lightweight stp file converter, so engineering data stays in-house. 📐 Mesh quality you control - Fast trims triangle count for a quick, light mesh - Balanced is the sensible default for most prints - Fine keeps curves smooth when surface detail matters - Custom exposes linear and angular deflection for a precise convert to stl The live model info shows dimensions, part count, triangle count, and the estimated output size, so you know what you are downloading before you commit. 🧩 Assemblies, your way ▸ Merge every part into one model for a single build plate ▸ Or export separate parts as a ZIP, one mesh per body, named from the assembly tree ▸ Uncheck the parts you do not need and convert only the rest ▸ Preview modes, shaded, wireframe, or shaded with edges, reveal facets before you slice It reads IGES and IGS with the same engine, so iges to stl and cad to stl behave exactly like the step path. A quick step file converter for legacy parts, no separate app required. ❓ Frequently asked questions 📌 How to convert step to stl without installing CAD software? 💡 Add STEP to STL Converter to Chrome, drag a .step or .stp file in, pick a quality, and save the mesh, with no SolidWorks, Fusion 360, or FreeCAD needed. 📌 How to convert stp to stl if my file uses the .stp spelling? 💡 It is the same tool. This stp file converter treats .stp, .step, .iges, and .igs the same way when converting stp to stl. 📌 Is my model uploaded anywhere? 💡 No. This is a fully local stl converter, so parsing and meshing happen in your browser and the file never leaves your computer. 📌 Can I pick binary or ASCII output? 💡 Yes. Choose binary STL for a compact model or ASCII STL for a text format, and set the mesh quality either way. 📌 Does it convert a whole assembly? 💡 Yes. Merge the whole assembly into one model, or save separate parts as a ZIP with each body named from the original file. 📌 Is there a free stl converter option? 💡 Yes. It is free from the Chrome Web Store, and also works as a general 3d file converter for step and iges parts. 🥇 Stop uploading confidential parts just to change a format. Add STEP to STL Converter to Chrome today and turn any .step, .stp, or .igs model into a clean, slice-ready mesh, an online step to stl converter that runs fully offline. 🎉