Download

Overview

	OS Independent	​Web Start	Windows	Mac OS X	Ubuntu, …
tested 19277	jar	jnlp	setup.exe (portable)	package.zip	see below
latest 19282	jar	jnlp			see below
older	download/

• Which version should I use? (see also: release system)
  • tested is released approx. monthly and shouldn't contain severe bugs
  • latest is released daily, may have more errors
  • If possible, use the Web Start version in order to automatically update.

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• Note that there are fairly regular updates, so always try running a recent version (and also recent plugins).
• Access JOSM-WebStart without installation
• Download the tested JOSM version 19277
• Download the Windows JOSM installer version 19277
• Download the Mac OS X JOSM package version 19277
• Prepare a USB flash drive to use JOSM on any foreign Windows machine.
• For download scripts use version check for latest and tested (or both) to reduce download bandwith
• If download size is an issue for you, you may append ?lang=.. to the download link for both releases to strip all unused translations (e.g. ?lang=de would download JOSM in German language only).

Development Version

• Download the latest JOSM version 19282 (may have more errors than "tested", be careful with this one).

Applet

• Try JOSM applet after reading the applet description.

Source

• Get the source:
  • From the official Subversion repository (recommended): svn co http://josm.openstreetmap.de/svn/trunk
  • From the unofficial ​GitHub mirror: git clone git://github.com/openstreetmap/josm.git
  • From the official OSM Subversion repository (including plugins): svn co http://svn.openstreetmap.org/applications/editors/josm josm

Ubuntu repository

The repository for Ubuntu contains two packages:

josm

The tested version
Replaces the package from the official Ubuntu repository.

josm-latest

The development version (nightly build)
Can be installed parallel to the josm package. The default preference folder is ~/.josm-latest.

Installation

Depending on your Ubuntu-Version, add one of the following lines to your /etc/apt/sources.list:

deb http://josm.openstreetmap.de/apt lucid universe
deb http://josm.openstreetmap.de/apt natty universe
deb http://josm.openstreetmap.de/apt oneiric universe
deb http://josm.openstreetmap.de/apt precise universe

Note: You can just run "lsb_release -c" in a terminal to get the proper codename.

Download and register the public key:

wget -q http://josm.openstreetmap.de/josm-apt.key -O- | sudo apt-key add -

Now refresh your sources

sudo apt-get update

and install:

josm

(You can skip the first line if you haven't installed these packages before.)

sudo apt-get remove josm josm-plugins
sudo apt-get install josm

josm-latest

sudo apt-get install josm-latest

useful options

If JOSM runs out of memory, you can increase the maximum size of allocated memory (400 MB in this example):

JAVA_OPTS="-Xmx400M" josm

Start with a different preference folder:

JAVA_OPTS="-Djosm.home=$HOME/.josm-tmp" josm

VM selection on Windows x64

For Windows, beware that some browsers may install their own JRE only in 32 bit mode, but may also install their version of the Javawebstart tool somewhere else with different file associations. This may cause your JNLP to start with this alternate JRE because it runs the wrong version of Javawebstart which only supports the 32 bit VM, and sometimes is built with a restricted support for VM options and a max VM size not exceeding 256MB.

Check, for example, if there's no other javawebstart in \Windows\SysWow64. You should not need it (the Java control panel will not detect it) and can safely delete it. Perfom cleanup and only keep the latest version of the JRE (1 for the 32-bit mode, another one for the 64-bit mode).

For shortcuts created on the desktop for JNLP and running the Javawebstart launcher (from \windows\system32), make sure to pass VM parameters prefixed with -J and no intermediate space before the VM option. If you have installd bith the 32-bit and 64-bit version, you should pass the option "-d64" if you want to select the preferred the 64-bit VM. Note that some Oracle documentation pages indicates the option "-D64" with the incorrect capitalization!)

Example of an edited commandline for the shortcut created on the windows desktop after running JOSM just once from the JNMP and exiting:

C:\Windows\System32\javaws.exe -J-d64 -Xmx=2048m -localfile -J-Djnlp.application.href=http://josm.openstreetmap.de/download/josm.jnlp "C:\Users\<snipped user name>\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\21\7311<snipped-hex-number>7f8"

You don't need to change the end of the command line with the snipped parts here. Just check the path for javaws.exe and add options "-J-d64" for the 64-bit mode needed to work with large OSM datasets, and "-Xmx=2048m" to increase the VM size (to 2GB here).