Save and open .strek projects

What the project file is for

.strek is Autostrek’s working project format. It packages structured project state with embedded GLB scene data, allowing the application to restore a project for continued work. Treat it as the editable master file; a .glb export is a separate delivery format.

The saved project includes supported model groups, current Build Generator settings, model notes, appearance, camera and Planner state. Not every open tool or reusable library travels with it; see what saves with your project.

Current CAD saves use .strek V27, including two-storey design settings, per-storey siding and separator profiles, designer variants and revisions, openings, dormers and floor layouts. Partitions, internal-door depth/alignment, room names and 2D furniture are retained. Earlier supported projects still open through the migration path, retaining their existing geometry. Readers that do not support V27 cannot open new saves. Keep an original copy before resaving, or use GLB export to share geometry with an older Viewer. See the two-storey guide and visual builder guide for saved design settings and the limits of regenerating manual 3D changes.

Current files also retain Custom Solid work planes, sketch sources, editable path patterns and constraints, exact OCCT bodies and face supports, object appearance, and the single-glass balcony-door style. Tilt and Wedge results save as exact bodies alongside their source sketches. Reference-image placement, calibration and opacity travel with their sketch. Undo/redo session history is not stored.

Save deliberately

1. Finish the active placement or edit and inspect the committed model.
2. If you have been working on Planner pages, return to Default view. Restore hidden groups and the full timeline state when saving a complete master model.
3. Open the save/export controls and choose Save project. Save needs a model and is unavailable while another save/export operation is busy.
4. Complete the system save dialog if the browser provides one; otherwise check the browser download location.
5. Confirm the resulting .strek file exists and keep it in a known project folder.

Use names such as garage-r01.strek and garage-r02-openings.strek for meaningful milestones. Save before replacing a generated model, running an advanced edit or loading another file. The browser may offer to replace an existing file or add a suffix to a download, so check the actual filename.

Choose compression

Compress GLB is enabled by default in the save controls. It compresses the embedded scene data with gzip while keeping the project as a .strek document. Loading decompresses it automatically; there is no need to unzip the file yourself. Compression changes storage, not the intended model dimensions.

Open and verify

Choose the .strek file in the load control and allow the scene to finish decoding. Loading replaces the current model, so preserve unsaved work first. Check a known dimension, object groups, model notes and each important Planner page.

Use a separate workspace session for a strong restore check. Measurements or quote work still visible in the original session can give a misleading impression of what the file contains. Supported older project versions are migrated during loading; invalid or unsupported files can report parsing, validation or migration errors. Follow save/load troubleshooting if this happens.

Project file versus export

Reopen .strek when you expect to edit in Autostrek. Export .glb when another viewer or 3D workflow needs model geometry. Keep both if the model is an important deliverable: the project file preserves editing context while GLB provides interchange.

For 3D printing, Save/Export also offers 3MF for current Custom Solid bodies. Select the bodies and mesh quality there; retain the .strek file for continued editing.