Free Online Tools

Browser-based tools that run entirely in your browser. No software to install, no files uploaded — your data stays on your device.

AutoCAD / DWG Tools

DWG Viewer

Free

Open, measure, and print AutoCAD DWG files in your browser. No software, no signup.

DWG to PDF Converter

Free

Convert DWG drawings to PDF entirely in your browser. No upload required.

SketchUp / SKP Tools

SKP Viewer

Free

View SketchUp 3D models in your browser. Orbit, pan, zoom. No upload, no signup.

SKP Converter

Free

Convert SketchUp SKP files to GLB, OBJ, STL, or PDF. No upload, no signup.

STEP / STP CAD Tools

STEP Viewer

Free

View STEP/STP CAD files in your browser. Assembly tree, per-part colors, orbit/pan/zoom.

STEP Converter

Free

Convert STEP/STP files to GLB, OBJ, STL, or PDF. No upload, no signup.

Lighting & Photometry

CircadianLab

Free

Calculate melanopic lux (EML) for circadian lighting design. IES photometry, radiosity, WELL v2 compliance.

IES Viewer

Free

Open IESNA LM-63 photometric files in your browser — 2D & 3D goniometer plots, beam analysis, iso-footcandle plot.

SPD Analyzer

Free

Compute melanopic / α-opic ratios per CIE S 026:2018, CCT, Duv, CRI from any TM-27 SPDX or CSV.

Other Tools

Screen Recorder

Free

Record your screen with audio, edit, trim, crop, and download. No install, no upload.

Document Tools

PDF to HTML Converter

Free

Convert PDF files to self-contained HTML with selectable text, embedded fonts, and crisp vector graphics. No upload, no signup.

Guides

How to Open a DWG File Online

Step-by-step guide to viewing DWG files without AutoCAD.

DWG File Format Explained

Deep dive into the DWG binary format, versions, and entity types.

Open DWG Without AutoCAD

Free alternatives to AutoCAD for opening DWG files.

View DWG Files on Any Device

DWG Viewer for Mac

View DWG files on macOS — Safari, Chrome, Firefox.

DWG Viewer for iPhone & iPad

Open DWG files on iOS with pinch-to-zoom and touch controls.

DWG Viewer for iPad

View DWG files on iPad Pro, Air, and Mini — ideal for job sites.

Other CAD Viewers

DXF Viewer

Planned

View DXF files online (coming soon).

CAD Viewer Online

Free browser-based CAD file viewer.

Why We Built These Tools

Innerscene makes premium artificial skylights — Virtual Sun and Circadian Sky — that bring realistic daylight to windowless spaces.

We built these free tools to help architects, engineers, and designers who work with our product drawings — and to share useful utilities with the wider community. Every tool runs entirely in your browser — your files and recordings never leave your computer.

DWG is a trademark of Autodesk, Inc. SketchUp and SKP are trademarks of Trimble Inc. Innerscene is not affiliated with Autodesk or Trimble.

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