MOBI ebook
A legacy ebook format associated with older Kindle workflows.
Best for older ereaders and archived ebook libraries.
MOBI to AZW3
Converts MOBI ebooks to AZW3. AZW3 supports richer formatting than MOBI and opens on Kindle devices when copied over USB. Add your files, convert them in one batch, and download each AZW3 directly.
1-hour guest cleanupMalware scanned2 at once, 10 per day
How to convert MOBI to AZW3
The converter runs in your browser and an isolated processing queue. Nothing to install, and every upload is scanned for malware before it is processed.
- 1Add your MOBI filesDrop MOBI files into the converter or choose them from your device. Guest files can be up to 25 MB each.
- 2Choose AZW3Set AZW3 as the output for the whole batch, then change individual files if needed.
- 3Convert and downloadStart the batch and download each AZW3 directly, or save it to your workspace to get a permanent link.
AZW3 ebook
A Kindle ebook format with richer layout support than classic MOBI.
Best for Kindle libraries and formatted ebooks.
MOBI to AZW3
What to expect from MOBI to AZW3
What changes in the file, and what to check before you share the result.
Why AZW3
AZW3 supports richer formatting than MOBI and opens on Kindle devices when copied over USB.
DRM-free books only
Books bought from stores often include DRM, which prevents conversion. Only DRM-free files convert correctly.
Starting from MOBI
MOBI is an older Kindle format, so complex formatting may already be simplified.
MOBI to AZW3 questions
Short answers about limits, privacy, and keeping the converted file.
Why won't my MOBI convert?
If the book came from a store, it probably has DRM, which blocks conversion. DRM-free ebooks convert normally.
Is the MOBI to AZW3 converter free?
Yes. Without an account you can convert up to 10 files a day, 2 at a time, up to 25 MB each. A free account adds monthly conversion credits and larger files.
How long are my files kept?
Guest uploads and results are deleted automatically after 1 hour. Conversions stay temporary when you are signed in too, unless you save a result to your workspace.
Can I get a permanent link to the AZW3 file?
Yes. Save the result to a SteadyLink workspace and it gets a stable link. If you make a new version later, replace the file and the link stays the same.
Browse by file type
Each category has its own converter, format list, and common routes.
Images
JPG, PNG, WebP, AVIF, GIF, TIFF, BMP, HEIC, ICO, SVG
Documents
DOC, DOCX, ODT, RTF, TXT, HTML, PDF
Spreadsheets
XLS, XLSX, ODS, CSV, PDF
Presentations
PPT, PPTX, ODP, PDF
PDF, DOCX, JPG, PNG, TXT
Audio
MP3, WAV, AAC, FLAC, OGG, M4A, Opus
Video
MP4, WebM, MOV, AVI, MKV, GIF, MP3
Archives
ZIP, TAR, TAR.GZ, 7Z
Ebooks
EPUB, MOBI, AZW3, PDF, TXT
Keep the useful ones.
Conversions remain temporary even when you are signed in, so save a result to your workspace when you want a stable URL and revision history.
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