Free online IGES to TIFF converter

A document-management system, printer, inspection report, or image archive may require a fixed raster image instead of editable CAD geometry. Converting the model to TIFF preserves a high-resolution view that can be shared without CAD software, but it does not preserve the original 3D data.

What the IGES format is

IGES (Initial Graphics Exchange Specification) is a text-based CAD exchange format for 2D drafting data, wireframes, curves, surfaces, annotations, and some solid-related entities. Files normally use the .igs or .iges extension and are exchanged between engineering, manufacturing, supplier, and archival systems.

CAD applications such as CATIA, SolidWorks, Siemens NX, AutoCAD, Rhino, and FreeCAD can import or export IGES. An IGES file describes model or drawing geometry; it is not a rendered image. IGES imports may contain separate or trimmed surfaces rather than a single watertight solid.

What the TIFF format is

TIFF (Tagged Image File Format) stores raster images as pixels and normally uses the .tif or .tiff extension. It supports high pixel dimensions, grayscale and RGB color, multiple pages in some applications, and lossless compression such as LZW or Deflate.

TIFF is suitable for rendered CAD linework, scanned drawings, technical documentation, printing, and archiving. Compared with JPEG, it is less likely to introduce compression artifacts around dimensions, text, and thin edges. A TIFF cannot preserve editable surfaces, solids, layers, constraints, units, or camera-independent 3D geometry.

How to convert the file online

1. Open the IGES-to-TIFF converter on 101convert.com; no software installation is required.
2. Upload the .igs or .iges file and start the conversion.
3. Download the generated .tif or .tiff file when processing finishes.

An online converter normally imports the geometry and renders it using a default camera, display mode, background, and image size. Check the downloaded image for the required orientation, visible edges, complete geometry, pixel dimensions, and legible annotations before using it in production documentation. Do not upload confidential designs unless the service's handling and retention policies meet your requirements.

Desktop workflow with FreeCAD

1. Open the file in FreeCAD with File → Open. FreeCAD uses the Open CASCADE geometry kernel to import supported IGES entities.
2. Choose a view with View → Standard views → Axonometric, or select a front, top, or side view. Use View → Standard views → Fit all to frame the model.
3. Hide construction geometry and adjust visibility, display mode, background, edge display, and line width in the model and view properties.
4. Save the rendered view as a high-resolution PNG with View → Save image..., for example as iges-view.png.
5. Convert the PNG to TIFF with ImageMagick:

magick iges-view.png -compress LZW iges-view.tif

The image dimensions determine the visible detail. DPI metadata mainly affects physical print sizing: a 10-inch-wide figure at 300 dpi requires approximately 3000 pixels across before TIFF conversion. Increasing the DPI value alone does not add detail to an already rendered image.

Quality and compatibility limits

This is a 3D-to-2D rendering, not a format-preserving CAD export. The selected camera, projection, zoom, lighting, tessellation, background, and display settings determine the TIFF contents. A different orientation or view requires another rendering.

Inspect the imported model before export. IGES files can contain duplicate entities, gaps between surfaces, unsupported annotations, missing trims, or incorrect unit interpretation. Repair or simplify faulty geometry in a CAD application when edges or surfaces are absent.

Use a sufficiently large pixel canvas for dimensions, labels, and fine edges. For broad compatibility, use an 8-bit RGB or grayscale TIFF with LZW compression; some viewers do not support every TIFF compression method, color depth, alpha channel, or multipage variant. A transparent background is useful only when the destination application supports TIFF transparency correctly. Keep the original IGES file separately because the TIFF cannot be edited as CAD geometry.