JNG to DokuWiki Converter
FileFlip converts JNG to DokuWiki entirely inside your browser, using ImageMagick, MuPDF and Pandoc compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert a JNG file to DokuWiki?#
- Drop your JNG file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to DokuWiki and the conversion starts on its own. FileFlip downloads 79.9 MB of WebAssembly the first time and nothing after that, then runs ImageMagick, MuPDF and Pandoc on your own machine.
- Save the DokuWiki file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting JNG to DokuWiki lose quality?#
No. The JNG picture is placed into the DokuWiki document at its full resolution, so every pixel reaches it intact. What you give up is that it becomes a picture inside a document rather than text.
Is it safe to convert JNG files online?#
Yes, because nothing is uploaded. FileFlip converts JNG files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What JNG to DokuWiki actually does to the file#
Converting JNG to DokuWiki runs on ImageMagick, MuPDF and Pandoc, downloads 79.9 MB of WebAssembly the first time and nothing after that, places the picture into the document at full resolution.
| Engine | ImageMagick, MuPDF and Pandoc |
|---|---|
| Conversion path | 3 steps: JNG → PNG → HTML → DokuWiki |
| Downloaded to your browser | 79.9 MB, once, then cached by your browser |
| Quality | Pixels preserved |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
Worth knowing before you start:
- the picture is placed in the document as a picture; no text is recognised out of it
- the file passes through HTML on the way, so anything HTML cannot express does not survive
What is a JNG file?#
A JNG file holds a single still image whose colour data is compressed as baseline or progressive JPEG inside the same chunk-based container PNG uses, with an optional PNG- or JPEG-encoded alpha channel for transparency.
There's little reason to create a new JNG file today; the format only makes sense inside an existing MNG animation that already mixes JPEG and PNG frames.
Convert JNG to JPG or PNG for anything meant to display in a browser, since none of the major browsers render JNG natively.
What is a DokuWiki file?#
A DOKUWIKI file holds a page written in DokuWiki syntax, the plain-text markup that DokuWiki itself stores as a .txt file on disk rather than in a database.
Keep pages in DokuWiki syntax while the wiki is actually running DokuWiki, since that's the renderer every construct is written for.
Convert DokuWiki syntax to another format when retiring the wiki or moving its content onto a different platform.
JNG to DokuWiki questions people ask#
What opens a JNG file?
JNG files open in GIMP, Gwenview and ImageMagick-based tools, but no mainstream web browser renders them. That gap is the main reason JNG never spread beyond the small set of software built around the MNG format.
Is JNG the same thing as PNG?
No. A JNG file reuses PNG's chunk-based container but compresses its colour data as JPEG instead of PNG's lossless method, so it behaves more like a JPEG with an optional transparency layer than a true PNG. JNG exists specifically as the lossy, photographic sibling inside the MNG animation format.
Why did JNG never catch on?
JNG's fate was tied to MNG, the animated format it was built to complement, and MNG never got the browser support GIF and later APNG had. Combined with newer formats like WebP and JPEG XL covering the same lossy-plus-transparency need, JNG stayed a niche format used mainly by MNG-aware software.
What program opens a DokuWiki file?
A DokuWiki page is a plain-text file, so any text editor opens it, but the markup only renders as a formatted page inside a running DokuWiki install. Viewing it as intended means either running DokuWiki or converting the file to a format like HTML or Markdown first.