Omia

How to open any file

Someone sent you a file your computer won't open. These guides compare the ways to open it on a Mac or a Windows PC, free and paid, offline and online. We make Xiaoer Omia (xiaoeromia.com), one of the options in each guide; the others are described as fairly as we can.

CAD and 3D

• How to open a DWG file without AutoCAD
  Five ways to open an AutoCAD .dwg file without AutoCAD: DWG TrueView, a DWG-to-DXF converter plus free CAD, an offline viewer like Xiaoer Omia, or a web viewer.
• How to open a DWG file on a Mac
  Five ways to open AutoCAD DWG files on a Mac: AutoCAD for Mac, Autodesk Viewer, converting to DXF for LibreCAD, a native offline viewer like Omia, or asking for a PDF. What each costs and what it can't do.
• How to open a DXF file without AutoCAD
  Five ways to open a .dxf drawing without AutoCAD on Mac or Windows: DWG TrueView, LibreCAD or QCAD, an offline viewer like Xiaoer Omia, or an online viewer.
• How to open and measure a STEP file
  Step by step: open a .step or .stp file on a Mac or PC without CAD, read its overall size and measure between two points. Plus what to do with 1 GB files and what RAM you need.
• How to open a SketchUp (.skp) file without SketchUp
  Five ways to open a SketchUp .skp file without SketchUp on Mac or Windows: SketchUp for Web, an offline viewer like Xiaoer Omia, and fixes for version errors.
• SketchUp Viewer was discontinued: what to use instead
  Trimble stopped offering the free SketchUp Viewer for desktop in April 2025. Here are five ways to view .skp models now, on Mac or Windows, and what each costs.
• How to open an STL file
  Five free ways to open an .stl 3D model on Mac or Windows: a slicer, Blender, a browser viewer, Xiaoer Omia, and what happened to 3D Viewer.
• How to open an OBJ file
  Five free ways to open a Wavefront .obj 3D model on Mac or Windows: Preview, Blender, MeshLab, a browser viewer, or Xiaoer Omia. The same works for PLY and GLB.
• How to open a GLB file on Mac or Windows
  Five ways to open a .glb or .gltf 3D model on Mac or Windows now that Windows 3D Viewer is gone: Preview, Blender, a browser viewer, or a free offline viewer like Xiaoer Omia.
• How to open a .blend file without Blender
  Four ways to open a Blender .blend file on Mac or Windows: Blender itself, an exported GLB or FBX, a web viewer, or an offline .blend viewer like Xiaoer Omia that needs no Blender install.
• How to open a Rhino .3dm file without Rhino
  Five ways to open a Rhino .3dm file on Mac or Windows without buying Rhino: the 90-day evaluation, a web 3D viewer, Blender with an add-on, an export from the sender, or an offline 3DM viewer like Xiaoer Omia.

Images and design

• How to open a PSD file without Photoshop
  Five ways to open a Photoshop .psd file without Photoshop on Mac or Windows: Preview, GIMP, Photopea, a free offline viewer like Xiaoer Omia, or Photoshop itself.
• How to open an AI file without Illustrator
  Five ways to open an Illustrator .ai file without Illustrator on Mac or Windows, how to turn it into PNG or PDF, and why some .ai files won't open.
• How to open a CDR file without CorelDRAW
  Five ways to open a CorelDRAW .cdr file on Mac or Windows without buying CorelDRAW: the free trial, Inkscape, LibreOffice Draw, a quick offline CDR viewer like Xiaoer Omia, or asking for a PDF.
• How to open RAW photo files on Mac or Windows
  Five ways to open camera RAW files such as CR2, CR3, NEF, ARW and DNG on Mac or Windows: Preview and Photos, Microsoft's Raw Image Extension, Lightroom, free RAW editors, or a quick viewer like Xiaoer Omia.
• How to open HEIC files on Windows
  iPhone photos arrive as .heic and Windows may not open them. Five ways to view HEIC on Windows and convert HEIC to JPG, PNG or PDF, with or without uploading.
• How to open a TIFF file and convert it to PDF or JPG
  Open .tif and .tiff files on Mac or Windows, including multi-page scans, and convert TIFF to PDF or JPG with Preview, Photos, GIMP, Xiaoer Omia or online tools.
• How to convert SVG to PNG, JPG or PDF
  Five ways to turn an .svg into a PNG, JPG or PDF on Mac or Windows: Inkscape, your web browser, a design app, an offline viewer like Xiaoer Omia, or a website.

Documents and data

• How to open a DOCX file without Microsoft Word
  Five ways to open a Word .docx file without Microsoft Word on Mac or Windows: Pages, Word for the web, LibreOffice, Xiaoer Omia, or Google Docs.
• How to open an XLSX file without Excel
  Five ways to open an Excel .xlsx or .xls file without Microsoft Excel on Mac or Windows: Numbers, LibreOffice, Excel for the web, Google Sheets, or Xiaoer Omia.
• How to open a PPTX file without PowerPoint
  Five ways to open a PowerPoint .pptx file without PowerPoint on Mac or Windows: Keynote, PowerPoint for the web, LibreOffice, Quick Look and Xiaoer Omia.
• How to open a CSV file (and convert it to Excel)
  Five ways to open a .csv file on Mac or Windows, and how to convert CSV to Excel without losing leading zeros or turning IDs into dates.
• How to open a JSON file (and turn it into CSV or Excel)
  Five ways to open a .json file on Mac or Windows: a text editor, Firefox, VS Code, Excel, or Xiaoer Omia, which also turns JSON into CSV or Excel offline.
• How to open an MD (Markdown) file
  Five ways to open a .md Markdown file on Mac or Windows, see it formatted instead of raw symbols, and convert Markdown to PDF or Word.
• How to open an EPUB file on Windows or Mac
  Five ways to open an .epub e-book on Windows or Mac: Apple Books, Calibre, Thorium Reader, a free offline viewer like Xiaoer Omia, or Send to Kindle.
• How to extract text from a PDF offline
  Save PDF text as .txt or Markdown on Mac and Windows without uploading the document. Check for a text layer, understand scanned PDF limits, and review the result.

Xiaoer Omia: 150+ formats in one app