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FODT to FB2 Converter

Convert FODT to FB2 online for free. Fast, secure, and high-quality conversion with no sign-up or software required.

Free to useNo file stored beyond 1 hourEncrypted over TLS 1.2/1.3No watermarks

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How it works

Three steps to your converted file

Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.

01

Upload your file

Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.

02

Choose an output format

Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.

03

Convert & download

Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.

What is an FODT file?

The FODT format (Flat XML OpenDocument Text) is a document file type defined by the OASIS OpenDocument Format (ODF) v1.2 specifications (ISO/IEC 26300). Unlike the standard ODT format, which acts as a ZIP-compressed container holding multiple XML sub-files and assets, FODT stores the entire document structure-including text, layout styles, and Base64-encoded images-within a single, uncompressed XML file. This human-readable architecture facilitates version control integration (e.g., Git) and direct XML parsing without requiring decompression libraries.

How to open an FODT file

FODT files are natively supported by the LibreOffice suite and Apache OpenOffice, which serve as the primary reference implementations for the ODF standard. Users on Windows, macOS, or Linux can open these files directly in LibreOffice Writer. Due to the uncompressed XML structure, the files can also be inspected or modified using code editors like Visual Studio Code or Notepad++, though this renders the raw markup rather than the formatted text.

FODT Technical Info

Full Name
Flat XML OpenDocument Text
Developed By
OASIS (Advancement of Structured Information Standards)
Initial Release
2011
MIME Type
application/vnd.oasis.opendocument.text-flat-xml

What is an FB2 file?

FB2 (FictionBook) is an XML-based e-book format originally developed in Russia by Dmitry Gribov. Unlike ZIP-based containers like EPUB, an FB2 file is a single monolithic XML document where the text is marked up with semantic tags describing the structure (epigraphs, verses, citations) rather than the visual appearance. Binary data, such as cover images or illustrations, are embedded directly within the XML file using Base64 encoding. This structural focus facilitates easy conversion to other formats and precise rendering across different hardware devices.

How to open an FB2 file

Support for FB2 is prevalent in e-reading software but rare in native OS environments. Calibre is the primary tool for opening and converting FB2 files on Windows, macOS, and Linux. For dedicated reading, FBReader and CoolReader are cross-platform applications specifically optimized for parsing the FictionBook XML schema. Android users frequently use Moon+ Reader, while iOS users can utilize TotalReader or KyBook.

FB2 Technical Info

Full Name
FictionBook 2.0
Developed By
Dmitry Gribov
Initial Release
2000
MIME Type
application/x-fictionbook+xml

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Why RunConvert

The fastest way to convert any file

Purpose-built for speed, privacy, and breadth of format support.

Convert FODT to FB2 in seconds

Every FODT to FB2 conversion runs on our servers, so your device stays fast and the output quality stays intact.

Fast, cloud-powered

No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

Secure & private

Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.

Free - no account needed

Convert without creating an account - no credit card, no trial clock. Sign in only if you want history and higher daily limits.

Developer API

Convert FODT to FB2 via API

Automate FODT to FB2 conversions in three steps: create a job, upload your file, then poll for the result.

# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tag": "fodt-to-fb2",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "fb2"
      },
      "export-result": {
        "operation": "export/url",
        "input": "convert"
      }
    }
  }'

# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.fodt

# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
  -H "Authorization: Bearer YOUR_API_KEY"

Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.