FB2 to OPML Converter
FileFlip converts FB2 to OPML entirely inside your browser, using 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 an FB2 file to OPML?#
- Drop your FB2 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 OPML and the conversion starts on its own. FileFlip downloads 65.8 MB of WebAssembly the first time and nothing after that, then runs Pandoc on your own machine.
- Save the OPML file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting FB2 to OPML lose quality?#
Not in the sense of pixels or samples. Converting FB2 to OPML rebuilds the file in OPML's own model rather than re-encoding it, so everything OPML can represent comes through exactly and anything it cannot has to be dropped. Expect the words to come through exactly and the page breaks to move.
Is it safe to convert FB2 files online?#
Yes, because nothing is uploaded. FileFlip converts FB2 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 FB2 to OPML actually does to the file#
Converting FB2 to OPML runs on Pandoc, downloads 65.8 MB of WebAssembly the first time and nothing after that, rebuilds the file in the target's own model, keeps selectable text and page layout.
| Engine | Pandoc |
|---|---|
| Conversion path | One step: FB2 → OPML |
| Downloaded to your browser | 65.8 MB, once, then cached by your browser |
| Quality | Rebuilt in the target's model |
| You get back | One file |
| 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 | Kept | Carried through into the converted file. |
| Page layout | Kept | Carried through into the converted file. |
What is an FB2 file?#
An FB2 file is a single XML document that holds an entire book's text, metadata and base64-encoded cover images, in the FictionBook format that originated in the Russian-language ebook scene.
Keep a book as FB2 when it is sourced from a Russian-language ebook library and the reader is FB2-native, such as FBReader or a PocketBook device.
Convert FB2 to EPUB to read the book on a device or app outside the small set of readers that understand FictionBook directly.
What is an OPML file?#
An OPML file is an XML document made of nested outline elements, most often used to move a list of RSS and Atom feed subscriptions from one feed reader to another.
Use OPML to move a list of feed subscriptions between RSS readers, or to export a hierarchical outline from an outliner app.
Convert OPML into a document format like HTML or Markdown when the outline itself, not the feed subscriptions, needs to be read as a document.
FB2 to OPML questions people ask#
What is an FB2 file?
An FB2 file is an ebook in the FictionBook format, a single XML document that holds the full text, metadata and any cover image in one file rather than the zipped archive EPUB uses. It was created in 2004 and is most common in Russian-language ebook collections.
Can I open an FB2 file on a Kindle?
Not directly. Kindle devices do not read FB2, so the file needs converting to EPUB or MOBI first, either through Amazon's Send to Kindle pipeline or a separate converter.
What reader apps open FB2 files?
FBReader, Calibre, Okular and SumatraPDF all read FB2 files natively, and it is also the default format on many e-readers sold in Russian-language markets. Mainstream apps like Apple Books and the Kindle app do not.
What is an OPML file?
An OPML file is an XML document that stores a nested outline, most commonly a list of RSS and Atom feed subscriptions. Feed readers use it to export a subscription list from one app and import it into another.