Supported File Formats for Technical Drawings
Werk24 supports a range of common file formats for extracting information from technical drawings. To ensure successful processing, submit your files in one of the supported formats listed below.
If you upload a drawing in an unsupported format, the system will return a DRAWING_FILE_FORMAT_UNSUPPORTED exception. For details on handling such errors, refer to our Error Handling Guide.
Supported File Formats:
| Extension | File Format Name |
|---|---|
.jpg, .jpeg | JPEG |
.png | Portable Network Graphics (PNG) |
.tif, .tiff | Tagged Image File Format (TIFF) |
.pdf | Portable Document Format (Vectorized and Raster) |
.plt, .hpgl, .hpg | HPGL plot files, through read_drawing only |
The callback route (read_drawing_with_callback, POST /techread/read-with-callback) checks the file before the read and takes PDF, PNG, JPEG and TIFF only. Anything else, HPGL included, is refused with 415 and is not read. Other formats (BMP, JPEG 2000, GIF, WebP, DXF, DWG, STEP) are not supported on either route: export them to PDF first.
Best Practices for File Submission
- Prefer vector PDFs when available: PDFs containing vector-based drawings (instead of raster images) generally yield better extraction results.
- Use high-resolution images: for raster formats (JPEG, PNG, TIFF), what matters is that the smallest text on the sheet lands on enough pixels, which is roughly 200–300 DPI at the sheet's real size. There is an upper limit too. See Resolution Limitations for the per-size targets and the ceiling.
- Avoid excessive compression: Overcompressed JPEGs may result in data loss, reducing extraction accuracy.
- Maintain original aspect ratio: Cropping or distorting drawings may impact processing quality.
By following these guidelines and submitting drawings in a supported format, you can maximize the accuracy and reliability of Werk24’s automated information extraction.
For additional assistance, please refer to our documentation or contact support.