Lost digital libraries are a nightmare for any avid reader. You might have stumbled upon a rare technical manual in the old LIT format, found a classic literary anthology in DJVU, or inherited a collection of Russian literature in FB2. For years, these formats ruled the early internet book-sharing scene, but as technology moved forward, support for them faded. Now, you likely find yourself stuck with files that your modern e-reader, tablet, or phone cannot open natively. The solution is not to start over from scratch; it is to convert. Whether you need to move your old LIT files to the universal EPUB standard, compress DJVU archives into readable PDFs, or simply clean up the formatting of an old FB2 file, modern conversion tools like BookConv make this process seamless. This guide will walk you through why these legacy formats are problematic today and how you can quickly rescue your digital reading experience across LIT, DJVU, FB2, and RTF files.
Why Old Formats Like LIT Are Hard to Read Today
The LIT format was Microsoft's attempt to dominate the e-book market back in the Windows CE and Pocket PC days. It was the native format for many MS Reader devices. However, Microsoft eventually discontinued MS Reader in favor of the EPUB and MOBI standards used by Kindle and Kobo.
The primary issue with LIT files is their proprietary nature. Modern operating systems like macOS, Android, and iOS do not include built-in viewers for them. Even Windows Store apps struggle to render them properly today. If you have a collection of older textbooks or manuals in LIT, they are effectively locked behind software that no longer exists on most new computers.
Converting LIT to EPUB or PDF is often the first step in library modernization. By stripping away the proprietary DRM and metadata, you ensure that your content remains accessible regardless of what device you pick up in five years.
Understanding the DJVU Format and Its Limitations
DJVU is a bit different from LIT. It is not proprietary in the same closed way; rather, it is an open standard designed primarily for scanned documents. DJVU uses advanced compression algorithms (based on DjVu technology) to keep file sizes incredibly small while maintaining high-resolution text and images. This made it incredibly popular for digitized newspapers, scholarly journals, and thick reference books.
However, DJVU has significant usability issues for the average reader:
- Not Reflowable: Unlike EPUB, DJVU files are usually fixed-layout. This means they do not adapt to different screen sizes. Reading a full-page DJVU on a small smartphone requires constant zooming and panning.
- Complex Navigation: While some viewers handle bookmarks well, generic media players often fail to recognize the internal structure of a DJVU file.
- Software Dependency: Native support is rare on mobile devices.
For these reasons, converting DJVU to PDF is often the preferred route for general distribution, as PDF is universally understood by every device, while keeping the visual fidelity of the original scan intact.
FB2: The Favorite of Russian E-Libraries
If you explore international or Eastern European literature, you have likely encountered FB2 ( FictionBook ). It was developed specifically to preserve the semantic structure of a book—distinguishing between titles, subtitles, footnotes, and body text. Unlike simple HTML wrappers, FB2 is a specialized XML format that many dedicated e-reader applications love because it renders cleanly without excessive code bloat.
Despite its elegance, FB2 is virtually unsupported by major commercial e-readers like the Kindle or Apple Books. It remains popular primarily within specific communities and regions. If you use a modern e-ink reader that relies on standard Amazon or Apple ecosystems, your FB2 files will sit unused.
The best approach here is to convert FB2 to EPUB. Since both formats share similar XML foundations, the conversion is usually lossless regarding text and structure. This allows you to take the clean typography of an FB2 file and place it into an ecosystem where you can sync progress across your devices.
RTF: Simple but Often Broken
Rich Text Format (RTF) was Microsoft's answer to universal document sharing before DOCX took over. It was designed to be readable across different word processors. However, RTF is terrible for long-form reading because it lacks reflowable text capabilities and proper typography controls. It is essentially a "dumb" format that stores visual layout data rather than content hierarchy.
Many users still have old RTF files because they were shared via email or instant messaging decades ago. When you try to open them, you often face formatting glitches, missing fonts, and poor page breaks.
Converting RTF to EPUB is the most transformative move you can make. EPUB introduces proper paragraph spacing, flexible line breaks, and better font handling. It turns a static document into a living book that adapts to your eyes. Similarly, converting RTF to PDF can be useful if you need a printable, fixed version of a short text.
How to Convert Your Files Efficiently
Manual conversion using desktop software like Calibre is an option, but it requires installation and technical know-how. For users who want a fast, browser-based solution, online converters offer a streamlined path. Tools like BookConv allow you to upload your legacy files and output them into your desired format without installing anything.
Here is a practical checklist for converting your library:
1. Backup Your Files: Always keep a copy of your original LIT or DJVU files before converting.
2. Choose the Right Output: Use EPUB for flexible reading on tablets and phones. Use PDF for printing or preserving exact layouts like DJVU scans.
3. Check Metadata: After conversion, inspect the title and author fields. Older formats often lose this data during messy transfers, so ensure it is correct.
4. Test on Your Device: Do not assume the conversion worked perfectly. Open the file on your actual e-reader to check for formatting errors.
By focusing on these steps, you can transition your entire backlog of old ebooks into modern formats that will last for years to come.