DokuWiki to JNG Converter
FileFlip converts DokuWiki to JNG entirely inside your browser, using Pandoc, MuPDF and ImageMagick 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 DokuWiki file to JNG?#
- Drop your DokuWiki 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 JNG and the conversion starts on its own. FileFlip downloads 79.9 MB of WebAssembly the first time and nothing after that, then runs Pandoc, MuPDF and ImageMagick on your own machine.
- Save the JNG file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting DokuWiki to JNG lose quality?#
Yes, in the sense that text stops being text. Each DokuWiki page is rendered to pixels and handed to JNG, so the result looks right and can no longer be selected, searched, or reflowed.
Is it safe to convert DokuWiki files online?#
Yes, because nothing is uploaded. FileFlip converts DokuWiki 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 DokuWiki to JNG actually does to the file#
Converting DokuWiki to JNG runs on Pandoc, MuPDF and ImageMagick, downloads 79.9 MB of WebAssembly the first time and nothing after that, renders each page to pixels, keeps page layout, and drops selectable text and transparency.
| Engine | Pandoc, MuPDF and ImageMagick |
|---|---|
| Conversion path | 3 steps: DokuWiki → HTML → PNG → JNG |
| Downloaded to your browser | 79.9 MB, once, then cached by your browser |
| Quality | Text becomes pixels |
| You get back | One image per page, zipped when the source has several |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Selectable text | Dropped | The target format has nowhere to put it. |
| Page layout | Kept | Carried through into the converted file. |
| Transparency | Dropped | The target format has nowhere to put it. |
Worth knowing before you start:
- pages render at twice their point size in opaque RGB, roughly 144 DPI, with no transparency
- reflowable input is laid out on a fixed 595x842pt page at 11pt before anything else happens
- the file passes through HTML on the way, so anything HTML cannot express does not survive
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.
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.
DokuWiki to JNG questions people ask#
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.
Why does DokuWiki store pages as text files instead of a database?
DokuWiki was built to skip a database entirely, storing every page as a plain-text file in this syntax on the server's filesystem. That makes a DokuWiki install easy to back up with a plain file copy and easy to read even without the software running.
Can I convert a DokuWiki page to Word or PDF?
Yes, DokuWiki syntax converts to formats like DOCX or PDF by first turning the markup into a structured document, which renders headings, links, and tables. Syntax that comes from a specific DokuWiki plugin may not convert, since only DokuWiki itself with that plugin installed knows how to render it.
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.