100% client-side processing

JWW drawings, converted in your browser

Privacy-first JWW viewer & converter

Your files never leave your browser.No upload required — all processing happens on your device.

Drag & drop a JWW file here

Choose a file

Supported format: .jww (Jw_cad)

How it works →

Why use JWW Converter

100% Private

Conversion runs entirely in your browser. Your drawings are never uploaded to a server — safe even for confidential work.

Offline capable

Multi-Format Export

Turn one drawing into SVG, PDF, PNG, or DXF — vector or raster, whichever your workflow needs.

SVG · PDF · PNG · DXF

No Installation

No Jw_cad, plugins, or sign-up. Open the page, drop a file, and start working instantly.

Instant start

How it works

Converting a JWW file takes three steps — all on your device.

  1. 1

    1. Open your file

    Drag a .jww file onto the page or pick it with the file chooser. Parsing happens in your browser using a Web Worker, so the page stays responsive.

  2. 2

    2. Preview the drawing

    The drawing renders instantly. Zoom and pan to inspect it, and toggle monochrome to preview a black-and-white version.

  3. 3

    3. Export

    Choose SVG, PDF, PNG, or DXF and download. The output matches what you see, including the monochrome setting.

Which format should I choose?

SVG
Scalable vector image — ideal for the web and further editing.
PNG
A raster image that opens anywhere. Choose the resolution.
PDF
Print-ready PDF: vector geometry with text embedded as an image.
DXF
CAD drawing data (R13) that opens in other CAD software.

Frequently asked questions

What is a JWW file?

A JWW file is a drawing created by Jw_cad, a widely used Japanese CAD application. It stores lines, arcs, text, and other 2D drawing data.

Is JWW Converter free?

Yes. The converter is completely free and runs entirely in your browser.

Are my files uploaded anywhere?

No. All parsing and conversion happen locally in your browser. Your files never leave your device.

Which formats can I export to?

You can export to SVG, PDF, PNG, and DXF. SVG and PDF keep vector geometry; PNG is a raster image; DXF opens in other CAD software.

Why isn't the text selectable in the PDF?

PDF geometry is exported as true vectors, but text is embedded as a high-resolution image. This keeps Japanese characters accurate without bundling large fonts.