Free online PNG to FB2 converter

Source format

PNG (Portable Network Graphics) is a raster image format widely used for screenshots, logos, diagrams, icons, and other graphics that need lossless compression and transparency support. It is common in web design, documentation, and digital artwork because it preserves sharp edges and fine detail better than lossy formats such as JPEG.

Target format

FB2 (FictionBook 2.0) is an XML-based e-book format used mainly for novels, short stories, and other text-centric books. It is popular in some e-book ecosystems because it stores structured content such as chapters, paragraphs, titles, and metadata in a compact, readable form. FB2 is best suited to reflowable text, not images as standalone content.

How to perform the conversion

Converting PNG to FB2 is not a typical image-to-document conversion. In practice, it usually means embedding one or more PNG images into an FB2 book, often as illustrations, covers, or scanned pages. If your goal is to create an FB2 e-book from PNG pages, the best approach is to use an e-book editor or converter that can assemble images into a structured FB2 file.

1. Prepare the PNG files: make sure the images are in the correct order and have consistent naming, such as 001.png, 002.png, and so on.
2. Choose a suitable tool: desktop e-book tools such as Calibre, FB2 editors, or XML-based editors can help create or edit FB2 files. If you only need a quick conversion, you can also use the built-in online converter on 101convert.com for free without installing software.
3. Create or open an FB2 project: in your editor, start a new FictionBook document or open an existing .fb2 file.
4. Insert the PNG images: add the images as illustrations or page content. In many editors this is done through Insert → Image or a similar menu path.
5. Save or export as FB2: use File → Save As or File → Export → FictionBook 2.0, depending on the software.
6. Validate the result: open the FB2 file in an e-book reader to confirm that the images display correctly and that the XML structure is valid.

If your PNG files are scanned book pages, OCR may be needed first if you want searchable text. Without OCR, the FB2 file will contain images only, which is useful for preserving page appearance but not for reflowable reading.

Notes on quality and limitations

PNG is lossless, so image quality is preserved when embedded in FB2, but the overall FB2 file can become large if many high-resolution images are included. FB2 is primarily designed for text, so a PNG-only FB2 is essentially an image container rather than a true reflowable e-book.

Compatibility can vary between readers: some FB2 apps handle embedded images well, while others may have limits on image size, XML structure, or metadata. For best results, keep image dimensions reasonable, use standard PNG files, and ensure the FB2 document remains well-formed XML.