NZB

{{Short description|XML-based file format}}

{{Infobox file format

| name = NZB file format

| icon =

| screenshot =

| caption =

| extension = .nzb{{Cite web|url=https://www.cryer.co.uk/file-types/n/nzb.htm|title=.nzb file extension :: all about the .nzb file type|website=www.cryer.co.uk|accessdate=2020-01-24}}

| mime = application/x-nzb

| magic =

| released =

| standard =

| open = yes

| url = [https://sabnzbd.org/wiki/extra/nzb-spec NZB file specification]{{Cite web|url=http://docs.newzbin.com/index.php?pagename=NZBSpecification|archive-url=https://web.archive.org/web/20040423064641/http://docs.newzbin.com/index.php?pagename=NZBSpecification|url-status=dead|archive-date=2004-04-23|title=NBDocs - NZBSpecification|date=2004-04-23|accessdate=2020-01-24}}

| logo =

| type code =

| uniform type =

| owner = NewzBin{{Cite web|url=http://everything.explained.at/NZB/|archive-url=https://web.archive.org/web/20130209223600/http://everything.explained.at/NZB/|url-status=dead|archive-date=2013-02-09|title=NZB explained|date=2013-02-09|accessdate=2020-01-24}}

| latest release version = 1.1

| latest release date = {{Start date and age|2009|11|10}}

| genre = Usenet extender

| container for =

| contained by =

| extended from = XML

| extended to =

}}

NZB is an XML-based file format for retrieving posts from NNTP (Usenet) servers.{{Cite web|url=http://www.techsono.com/usenet/faq/nzb|title=NZB Files Explained in Plain English|accessdate=2020-01-24}} The format was conceived by the developers of the Newzbin.com Usenet Index.{{Cite web|url=https://www.nzb.fi/2005/08/nzb-01-released/|title=nzb 0.1 Released « nzb|accessdate=2020-01-24}}{{Cite web|url=http://powerpost.free.fr/|title=Power-Post-2000-A&A|website=powerpost.free.fr|accessdate=2020-01-24|date=2004-03-21}} NZB is effective when used with search-capable websites.{{Cite web|url=https://www.binaries4all.com/nzb/|title=Tutorial: What is NZB? What are NZB files? |website=Binaries4all Usenet Tutorials|accessdate=2020-01-24}} These websites create NZB files out of what is needed to be downloaded.{{Cite web|url=http://www.wisegeek.com/what-is-an-nzb-file.htm|title=What is an NZB File? (with picture)|website=wiseGEEK|accessdate=2020-01-24}} Using this concept, headers would not be downloaded hence the NZB method is quicker and more bandwidth-efficient than traditional methods.{{Cite web|url=http://newsleecher.com/forum/viewtopic.php?t=2503|title=Select download folder when using NZB?|website=NewsLeecher Forums|accessdate=2020-01-24|date=2004-09-11}}

Each Usenet message has a unique identifier called the "Message-ID".{{Cite web|url=https://www.binaries4all.nl/nzb/|title=Handleiding: Wat zijn NZB-bestanden? Wat is NZB?|website=binaries4all.nl|accessdate=2020-01-24}} When a large file is posted to a Usenet newsgroup, it is usually divided into multiple messages (called segments or parts) each having its own Message-ID.{{Cite web|url=http://docs.newzbin.com/index.php?pagename=WhatIsAnNZBFile|archive-url=https://web.archive.org/web/20040504002459/http://docs.newzbin.com/index.php?pagename=WhatIsAnNZBFile|url-status=dead|archive-date=2004-05-04|title=NBDocs - What Is An NZB File|date=2004-05-04|accessdate=2020-01-24}} An NZB-capable Usenet client will read all needed Message-IDs from the NZB file, download them and decode the messages back into a binary file (usually using yEnc or Uuencode).{{Cite web|url=https://sourceforge.net/projects/nzb/files/nzb/0.1/|title=nzb - Browse /nzb/0.1 |website=SourceForge.net|accessdate=2020-01-24}}