Does FB2 → EPUB lose quality?

The target format compression is neutral (lossless or container-only) - neither degrades nor improves quality.

Which format for Kindle?

AZW3 (newest) or MOBI (older, works with every Kindle). EPUB does not run natively on Kindle - convert to AZW3 before sending.

TOC, index, cover preserved?

Yes - Calibre (the engine we use) understands book structure and carries it over to the target format.

We do not remove it. Books bought on Amazon / Kobo / Google Play have DRM - strip it in the source reader first.

CBZ is a ZIP of images, CBR is a RAR. Converting CBR → CBZ just means unpack and repack as ZIP.

Is the conversion safe?

Yes. Small files convert inside your browser - never uploaded. Larger ones land on our server temporarily and are wiped automatically: 200 MB after 10 min, 100 MB after 20 min, 50 MB after 30 min, smaller after one hour. You can also delete them instantly after download.

Yes - 200 MB max per file. Larger files get rejected for performance and cost reasons.

Do you preserve original quality?

Depends on the pair. Lossy compression (e.g. JPG, MP3) always trims something - we set sensible defaults. Lossless (FLAC, PNG, ZIP) keeps everything 1:1.

Do I need an account?

No. The converter works right away - no signup, no login, no payment.

YourDevToolsPro

FB2 to EPUB converter

FB2 to EPUB converter online. Free, no watermarks, no account.

Runs in your browser

FB2 → EPUB converter

FB2 to EPUB conversion in 3 steps: upload, click convert, download.

Files auto-delete from our server

Anything you upload is wiped 3 minutes after you close this tab or leave the tool. Protects your privacy and keeps our disks clean.

Drop a file here or click to pick one

The file goes to our server, gets converted, and is wiped automatically.

Up to 200 MB per file

Your privacy. Small files convert locally in your browser. Larger ones land on our server temporarily and are wiped automatically, latest after one hour. You can also delete them instantly after downloading.

Convert FB2 to EPUB

FB2 to EPUB converter: upload, click convert, download the result. Free, no watermarks, no account. Small files convert inside your browser (never uploaded). Larger ones go to our server and disappear automatically after a few minutes. Hit "Delete now" to wipe them instantly after download.

How to convert

Pick your FB2 file - drag it onto the dropzone or click to choose.
The target format EPUB is already selected.
Hit Convert and wait a few seconds. Larger files take longer.
Download the result. Press Delete now to wipe the server copy immediately.

When to use it

Kindle - EPUB → MOBI / AZW3 (native Amazon formats).
iOS / Apple Books - MOBI → EPUB.
PDF to e-reader - PDF → EPUB (reflowable text, fits any screen).
Comics - CBR → CBZ (ZIP instead of RAR).
FB2 → EPUB - common case.

Frequently asked questions

FB2 (FictionBook) is popular in Russian and Eastern European reader communities but unsupported by Kindle, Kobo and Apple Books. EPUB works on every mainstream reader. Convert FB2 to EPUB to read classic fiction on standard hardware.

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