What is EPUB?

EPUB is the open standard ebook format maintained by the International Digital Publishing Forum (IDPF), supporting reflowable content and DRM.

What is FB2?

FB2 (FictionBook) is an XML-based ebook format popular in Russia and Eastern Europe, with a focus on structured book metadata and content.

When Should You Use EPUB vs FB2?

Use EPUB When...

Reach for EPUB when your priority is ebooks, digital publications, readers — its uncompromising quality ensures every detail is preserved.

Use FB2 When...

Reach for FB2 when your priority is fiction ebooks, russian-language publishing — its uncompromising quality ensures every detail is preserved.

EPUB vs FB2: Key Differences

•EPUB and FB2 diverge on compression: lossless compression for the source, lossless compression for the target.
•Both formats share lossless compression, so quality behavior is similar across the two — file size differences come from algorithm efficiency rather than compression philosophy.
•Alpha channel support: FB2 lacks transparency support.
•File sizes: EPUB files typically range 500KB to 5MB for typical ebooks and FB2 files 300KB to 2MB.
•Primary audience: EPUB is built for ebooks, digital publications, readers scenarios, while FB2 focuses on fiction ebooks, russian-language publishing — pick the format that matches your output requirement.

Advantages of EPUB

✓EPUB compresses data using lossless methods, keeping file sizes manageable for Ebooks, digital publications, readers.
✓Industry-wide support means EPUB files open anywhere — from legacy systems to the latest devices.
✓Lossless quality makes EPUB the gold standard for archival and master copies.
✓From professional software to open-source alternatives, EPUB works out of the box.

Advantages of FB2

✓FB2 compresses data using lossless methods, keeping file sizes manageable for Fiction ebooks, Russian-language publishing.
✓Industry-wide support means FB2 files open anywhere — from legacy systems to the latest devices.
✓Lossless quality makes FB2 the gold standard for archival and master copies.
✓From professional software to open-source alternatives, FB2 works out of the box.

Common Use Cases for EPUB to FB2 Conversion

Newsletter archives
Digital publishing
Educational materials
Self-published books
Interactive content
Academic journals

Industry Applications

Scientific JournalsDigital PublishingEducationSelf-publishingLibrary ScienceJournalism

Best Practices for EPUB to FB2 Conversion

→Converting EPUB to FB2: test the output on multiple reading devices before distribution
→FB2 offers good compatibility with various e-readers
→Include proper metadata (title, author, ISBN) for better discoverability
→Always keep a backup of your original files before converting
→Choose the appropriate quality settings for your specific use case

Troubleshooting EPUB to FB2 Conversion

!Formatting lost when converting EPUB to FB2 → complex book layouts with CSS may not transfer perfectly
!Images not displaying in the FB2 ebook → check that image formats used in EPUB are supported by FB2
!Table of Contents broken after EPUB to FB2 conversion → some ebook formats handle navigation differently
!FB2 file has DRM issues → DRM-protected EPUB files must be unlocked (where legally permitted) before conversion

Related Ebook Converters

Convert EPUB to Other Formats

All Ebook Formats

EPUB

View all Ebook converters →

More Ebook tools

Convert to FB2 →Convert from EPUB →

Convert EPUB to FB2 Online - Free & Fast

Convert EPUB files to FB2 online for free. High-quality conversion with no registration required.

Ebook Converter

Upload or enter a URL to convert EPUB to FB2 instantly

Click to upload or drag & drop EPUB file

or paste from clipboard

.epub,.EPUB (max 100MB)

SSL EncryptedAuto-deleted in 1 hourProcessed securelyNo registration needed

Verifying security check…

About EPUB and FB2

EPUB

EPUB is the global standard for reflowable ebooks, rich with CSS and HTML features. It works beautifully in modern readers but can be overly complex for simple text-focused reading devices.

FB2

FB2 (FictionBook) is an XML-based format popular in Eastern Europe that structures books around semantic content rather than visual presentation. Converting EPUB to FB2 is useful for compatibility with FB2-centric libraries and readers.

Common Use Cases

Upload a book to a Russian or Eastern European ebook library.
Read on FB2-compatible devices and software common in the region.
Convert complex EPUB formatting into FB2's semantic structure.
Reach audiences whose primary ebook ecosystem uses FictionBook.

Format Comparison

CompressionLossless → Lossless

TransparencySupported

Use CaseConvert from ebooks, digital publications, readers to fiction ebooks, russian-language publishing

File Size~300KB to 2MB after conversion

FAQs

Is converting EPUB to FB2 free?

Yes, GoConvertFile offers free conversion of EPUB to FB2 for files up to 100MB.

What is FB2 format?

FB2 (FictionBook) is an XML-based ebook format popular in Russia and Eastern Europe. It stores books with structured metadata and flexible styling.

How long does it take to convert EPUB to FB2?

Most EPUB to FB2 conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is FB2 best used for?

FB2 is ideal for fiction ebooks, russian-language publishing. FictionBook, XML-based ebook format popular in Russia

What file size should I expect after converting EPUB to FB2?

File size after EPUB to FB2 conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

Related Tools

View all ebook converter converters

What is EPUB?

EPUB is the open standard ebook format maintained by the International Digital Publishing Forum (IDPF), supporting reflowable content and DRM.

What is FB2?

FB2 (FictionBook) is an XML-based ebook format popular in Russia and Eastern Europe, with a focus on structured book metadata and content.

When Should You Use EPUB vs FB2?

Use EPUB When...

Reach for EPUB when your priority is ebooks, digital publications, readers — its uncompromising quality ensures every detail is preserved.

Use FB2 When...

Reach for FB2 when your priority is fiction ebooks, russian-language publishing — its uncompromising quality ensures every detail is preserved.

EPUB vs FB2: Key Differences

•EPUB and FB2 diverge on compression: lossless compression for the source, lossless compression for the target.
•Both formats share lossless compression, so quality behavior is similar across the two — file size differences come from algorithm efficiency rather than compression philosophy.
•Alpha channel support: FB2 lacks transparency support.
•File sizes: EPUB files typically range 500KB to 5MB for typical ebooks and FB2 files 300KB to 2MB.
•Primary audience: EPUB is built for ebooks, digital publications, readers scenarios, while FB2 focuses on fiction ebooks, russian-language publishing — pick the format that matches your output requirement.

Advantages of EPUB

✓EPUB compresses data using lossless methods, keeping file sizes manageable for Ebooks, digital publications, readers.
✓Industry-wide support means EPUB files open anywhere — from legacy systems to the latest devices.
✓Lossless quality makes EPUB the gold standard for archival and master copies.
✓From professional software to open-source alternatives, EPUB works out of the box.

Advantages of FB2

✓FB2 compresses data using lossless methods, keeping file sizes manageable for Fiction ebooks, Russian-language publishing.
✓Industry-wide support means FB2 files open anywhere — from legacy systems to the latest devices.
✓Lossless quality makes FB2 the gold standard for archival and master copies.
✓From professional software to open-source alternatives, FB2 works out of the box.

Common Use Cases for EPUB to FB2 Conversion

Newsletter archives
Digital publishing
Educational materials
Self-published books
Interactive content
Academic journals

Industry Applications

Scientific JournalsDigital PublishingEducationSelf-publishingLibrary ScienceJournalism

Best Practices for EPUB to FB2 Conversion

→Converting EPUB to FB2: test the output on multiple reading devices before distribution
→FB2 offers good compatibility with various e-readers
→Include proper metadata (title, author, ISBN) for better discoverability
→Always keep a backup of your original files before converting
→Choose the appropriate quality settings for your specific use case

Troubleshooting EPUB to FB2 Conversion

!Formatting lost when converting EPUB to FB2 → complex book layouts with CSS may not transfer perfectly
!Images not displaying in the FB2 ebook → check that image formats used in EPUB are supported by FB2
!Table of Contents broken after EPUB to FB2 conversion → some ebook formats handle navigation differently
!FB2 file has DRM issues → DRM-protected EPUB files must be unlocked (where legally permitted) before conversion

Related Ebook Converters

Convert EPUB to Other Formats

All Ebook Formats

EPUB

View all Ebook converters →

More Ebook tools

Convert to FB2 →Convert from EPUB →

Convert EPUB to FB2 Online - Free & Fast

Convert EPUB files to FB2 online for free. High-quality conversion with no registration required.

Ebook Converter

Upload or enter a URL to convert EPUB to FB2 instantly

Click to upload or drag & drop EPUB file

or paste from clipboard

.epub,.EPUB (max 100MB)

SSL EncryptedAuto-deleted in 1 hourProcessed securelyNo registration needed

Verifying security check…

About EPUB and FB2

EPUB

EPUB is the global standard for reflowable ebooks, rich with CSS and HTML features. It works beautifully in modern readers but can be overly complex for simple text-focused reading devices.

FB2

Common Use Cases

Upload a book to a Russian or Eastern European ebook library.
Read on FB2-compatible devices and software common in the region.
Convert complex EPUB formatting into FB2's semantic structure.
Reach audiences whose primary ebook ecosystem uses FictionBook.

Format Comparison

CompressionLossless → Lossless

TransparencySupported

Use CaseConvert from ebooks, digital publications, readers to fiction ebooks, russian-language publishing

File Size~300KB to 2MB after conversion

FAQs

Is converting EPUB to FB2 free?

Yes, GoConvertFile offers free conversion of EPUB to FB2 for files up to 100MB.

What is FB2 format?

FB2 (FictionBook) is an XML-based ebook format popular in Russia and Eastern Europe. It stores books with structured metadata and flexible styling.

How long does it take to convert EPUB to FB2?

Most EPUB to FB2 conversions complete within seconds for standard-sized files. Larger files may take longer depending on the conversion complexity.

What is FB2 best used for?

FB2 is ideal for fiction ebooks, russian-language publishing. FictionBook, XML-based ebook format popular in Russia

What file size should I expect after converting EPUB to FB2?

File size after EPUB to FB2 conversion depends on the content complexity and quality settings. Both formats use similar compression approaches so sizes are comparable.

Related Tools

View all ebook converter converters