What a JWW file is
JWW is the native drawing format of Jw_cad, a 2D CAD application used widely in Japan for architectural, building-services, and civil drawings. Jw_cad is developed by Jiro Shimizu and Yoshifumi Tanaka; the project site is jwcad.net.
If you receive a .jww file and you work in AutoCAD or another CAD package, you often cannot open it directly. That is the usual reason people search for “JWW to DXF,” “JWW to DXF online,” or “JWW to DWG.” Related Japanese-language files such as JWS show up in the same conversations.
DXF versus DWG for this hand-off
- DXF (Drawing Exchange Format) is commonly used to pass a drawing from one CAD program to another.
- DWG is AutoCAD’s native format and is also read and written by many other applications. Some recipients ask for DWG even when the practical first step is a DXF export.
Draw Convert’s planned scope is JWW ↔ DXF/DWG ↔ SXF (SFC/P21). Turning JWW files into PDF is a real request in Japanese search, but it is outside this product’s current scope.
Paths people typically use
- If you have Jw_cad: Japanese how-tos commonly describe exporting DXF from the application itself, then opening that DXF in the receiving CAD.
- If you do not have Jw_cad: you need a conversion tool. That is the job Draw Convert is being built to do.
- If the recipient wants DWG: public write-ups often describe going through DXF or using a dedicated converter.
No path guarantees a pixel-identical drawing. Text, linetypes, layers, dimensions, and blocks can look different after an exchange. Review the result visually before you rely on it.
Exporting DXF from Jw_cad
If Jw_cad is installed, documentation aimed at Japanese users commonly describes a File → Save As (or “Save as DXF”) path. Labels vary by version, so check the menus and help in the copy you have. You may also see options for DXF version or character encoding; pick settings the receiving CAD can read, then open the file there to confirm.
That export is not the same as an online converter. It writes DXF from the original application. Draw Convert is aimed at people who need conversion without depending on that path. The service is not live yet.
Problems that come up often
Public questions about JWW to DXF/DWG repeatedly mention the following. We list them as checks, not as problems we promise to eliminate.
- Garbled Japanese text, usually from encoding or font mismatches.
- The receiving CAD cannot open the DXF at all.
- Layers, colors, or linetypes looking different from the original.
- Missing or shifted entities and dimensions.
What Draw Convert is building
Draw Convert is a Japan-first conversion project for JWW, DXF/DWG, and SXF (SFC/P21). Some Chinese-language materials use the subtitle 日语 CAD 图面格式转换.
What you can do today is walk through the workflow on the homepage and download a prepared DXF R12 example. The demo does not upload your drawing or convert it. Join the waitlist if you want to be notified when conversion opens.
A longer Japanese version of this explainer is at JWWとDXF/DWGの変換. SXF (SFC/P21) is covered in Japanese at SXFとは.
Frequently asked questions
Can I convert a JWW file to DXF here?
Not yet. Draw Convert is building conversion between JWW, DXF/DWG, and SXF (SFC/P21), but converting your own drawings is not available. If you have Jw_cad, exporting DXF from that application is the usual path described in Japanese documentation. Join the waitlist on the homepage to hear when conversion opens.
What is the difference between DXF and DWG in this context?
DXF is commonly used to exchange drawings between different CAD programs. DWG is AutoCAD’s native format and is also read by many other applications. Recipients who do not use Jw_cad often ask for one of the two. Some write-ups describe going through DXF when a DWG is ultimately required.
Why does Japanese text look garbled after conversion?
Notes and dimensions written in Japanese can break when the export and the receiving CAD disagree about character encoding or fonts. Check export options, fonts, and the receiving application’s text settings. Draw Convert does not promise to prevent garbled text.
Is there an online JWW to DXF converter?
People do search for online converters. Before using any service, decide whether the drawing may leave your machine. Draw Convert’s live site is a workflow demo plus a prepared DXF example; it does not upload or convert your file.
Get notified when conversion opens
We will email you when converting your own drawings is available. Until then, the homepage demo and sample DXF stay available to review.