Free Online CAD Tools
CAD Viewers & Converters — No Install Required
Open, inspect, and convert 50+ CAD file formats directly in your browser. Built for engineers, designers, and teams who need instant access.
- Browser-based
- 50+ formats
- Instant conversion
CAD Viewer
Open and inspect any CAD file instantly in your browser. View STEP, IGES, STL, OBJ, PLY, and more without installing software.
CAD Converter
Convert between CAD formats in seconds. Transform STEP to STL, OBJ to STL, IGES to STEP, and more with preserved geometry.
CAD Converters
Convert between CAD formats instantly — no software installs, no file size limits, no waiting.
STL to OBJ Converter
Convert STL meshes to OBJ format with preserved geometry.
OBJ to STL Converter
Export OBJ models as STL for 3D printing workflows.
STEP to STL Converter
Convert STEP solid models to printable STL meshes.
IGES to STEP Converter
Upgrade legacy IGES files to modern STEP format.
3MF to STL Converter
Convert 3MF additive manufacturing files to STL.
PLY to OBJ Converter
Transform PLY scan data to OBJ for editing and rendering.
CAD Viewers
Open and inspect 3D models, meshes, and point clouds — right in your browser with zero downloads.
OBJ Viewer
View OBJ mesh models and 3D assets in your browser.
STL Viewer
Inspect STL meshes for 3D printing checks.
PLY Viewer
Open PLY point clouds and polygon meshes online.
STEP Viewer
View STEP solid models from any CAD software.
IGES Viewer
Open legacy IGES surface and wireframe models.
3MF Viewer
Preview 3MF files optimized for additive manufacturing.
Organization Hierarchy
Visualize teams, reporting lines, and structure—build org charts in your browser with nothing to install.
Org Chart Creator
Build professional organizational charts online—no install, ready to share.
Interactive Chart Maker
Draw and edit hierarchy nodes, reporting lines, and departments in one canvas.
Team Structure Visualizer
Map roles and reporting relationships so everyone sees how the org fits together.
Company Hierarchy Overview
Start from a template or blank chart to capture your company or group layout.
Reporting Lines Diagram
Clarify who reports to whom—ideal for onboarding and leadership reviews.
Shareable Org Charts
Create a chart your team can reference anytime, straight from the browser.
Don't See Your Format?
Marathon OS supports 50+ CAD formats. Upload any file and we'll handle the rest - viewing, converting, and sharing.
The CAD marketplace for modern teams