Convert SXF(SFC) to DXF Structural
No signup, unlimited use. Drop a file to convert SXF (SFC) to DXF and preview the result instantly. Deterministic conversion — entities are mapped one-to-one wherever possible.
- 01Drop your drawing file
- 02Pick a format & convert
- 03Preview & download
When you need this
- Open a Japanese public-works deliverable (SFC) in your CAD
- Convert SFC files to DXF for partners without SXF support
- Inspect Japanese project drawings without special software
About converting SXF(SFC) to DXF
SFC files come from SXF, Japan's national standard for public-works CAD deliverables — and they're nearly impossible to open outside Japan. zumen-gate displays SFC files in your browser and converts them to DXF so you can work with them in any CAD application.
SFC is the lightweight file type of SXF, the Japanese national standard for exchanging public-works CAD drawings. It is rarely supported outside Japan, and even in Japan the official free viewer was discontinued in 2014.
The converted DXF opens in AutoCAD, BricsCAD, LibreCAD, QCAD, and practically any other CAD application. You can choose between R2010 (AC1024) for modern software and R12 (AC1009) for older tools.
All conversions run through a single engine with a common intermediate representation. Every conversion produces a loss report tallying which entities were converted as-is and which were approximated or dropped — so you can trust the output, or know exactly why not.
FAQ
SXF(SFC) → DXF conversion — frequently asked questions
What is an SFC (SXF) file?
SXF is the Japanese government standard for exchanging CAD data in public-works projects; SFC is its lightweight file type. The official free SXF viewer was discontinued in 2014, so a browser-based viewer/converter is now the most practical way to open these files.
Which DXF version should I choose?
Choose R2010 (AC1024) for AutoCAD and most modern CAD software. Choose R12 (AC1009) for older CAD applications or CNC/CAM tools. If unsure, try R2010 first and fall back to R12 if it won't open.
Will my drawing break when converting SXF(SFC) to DXF?
The conversion is a deterministic, structural translation through a common intermediate representation. After every conversion you get a loss report listing exactly which entities were converted, approximated, or dropped — so you can verify the result on the spot.
Is there a limit on conversions or downloads?
No. Conversions and downloads are unlimited, and no account is required. The only limit is 10MB per file.
What happens to the files I upload?
Transfers and storage are encrypted, and your drawings are never sold or shared with third parties. On the free tier, uploads are used to improve the service and train our AI models, so please avoid uploading confidential drawings. A no-training Pro plan is available — see the data policy page for details.