Upload your AZW3 file using the picker above and the converter detects the source type and runs the AZW3 → MOBI pipeline. The result downloads automatically when conversion completes; no account needed for one-off conversions.
Is the AZW3 to MOBI converter free?
+
Yes — basic AZW3 → MOBI conversion is free with no registration. Premium adds higher per-file size limits, more parallel batch workers, and removes ads.
How big a AZW3 file can I convert to MOBI?
+
Free accounts: up to 100 MB per AZW3 file. Premium: typically 1 GB per file, depending on the AZW3 source type. Very large files are split into chunks server-side when the MOBI format allows.
Will conversion change the content of my AZW3?
+
Conversion preserves all information that both AZW3 and MOBI can represent. Format-specific features that the MOBI format doesn't support (e.g. vector data in raster output, formulas in plain-text output) are rasterized or stripped — see the format-specific notes on the result page.
AZW3 ファイルを MOBI に一度に変換できますか？
+
Yes — drop multiple AZW3 files into the upload zone and they are queued in parallel. Premium has more parallel workers; on a 50-file batch this is the difference between minutes and seconds.