This page is missing command features. The list of commands is probably better situated on a separate page.


Preferences > Remote Control

source:trunk/images/preferences/remotecontrol.png Settings for the remote control feature.

Remote Control allows JOSM to be controlled from other applications, e.g. from a web browser, by opening a listening TCP port (8111) on localhost where it accepts commands.
Since JOSM version 6941 it is also listening for HTTPS on port 8112.
Note: Due to security reasons this feature is disabled in the default settings and has to be enabled manually.

If you access the a website via HTTPS and use the Remote Control it will also use HTTPS to control your JOSM. If it does not work, note that your browser, security addons/plugins and firewalls may block this access (you may be able to whitelist/allow it inside these tools) – check your logs. In addition you may need to tell your browser to accept the self-signed JOSM HTTPS certificate. More details on some of these issues: How do I enable the "remote control" in JOSM? (on the OSM help site).

The following control options are available:

Remote Control Preferences ver6767

  • Enable remote control allows to switch the remote control feature on or off.
    • Load data from API
    • Import data from URL
    • Load imagery layers
    • Change the selection
    • Change the viewport
    • Create new objects
    • Read protocol version
  • Confirm all Remote Control actions manually

List of Commands

A complete list of commands and mandatory/optional parameters is shown at (when JOSM is running).


Instructs JOSM to download a bounding box from the API, zoom to the downloaded area and optionally select one or more objects.

GET /load_and_zoom?left=...&right=...&top=...&bottom=...&select=object[,object...]


Parameter Required/Optional Meaning
bottom R Minimum latitude
top R Maximum latitude
left R Minimum longitude
right R Maximum longitude
new_layer O If true, downloads to a new layer
addtags O Optional parameter to add tags. The key and value is separated by "=" and multiple tags can be separated by a Pipe "|". See details.
select O Comma-separated list of objects that should be selected. Object specifiers are combinations of the words "way", "node", or "relation", and the numerical object id. Example: select=way38473,node12399,node54646
zoom_mode O download | selection, defaults to selection
changeset_comment O Comment of the changeset
changeset_source O Source of the changeset
search O Search objects in the current data layer. See Search


Start JOSM (don't forget to enable the RemoteControl feature), then click on:

JOSM should now load an area in the German Schwarzwald and have the specified node selected.


Instructs JOSM to zoom to the specified area and optionally select one or more objects.

GET /zoom?left=...&right=...&top=...&bottom=...&select=object[,object...]

Accepts the same parameters as the load_and_zoom command and uses the same code for zoom and selection. The only difference is that no data will be loaded from the API.

Hint: This command can also be used to select objects only. Just enter a small arbitrary area to the left..bottom entries and add the object list to the select= option.


Instructs JOSM to download the specified OSM file and add it to the current data set.

GET /import?url=...


Parameter Required/Optional Meaning
url R
new_layer O If true, downloads to a new layer


(since version 1.6) Instruct JOSM to load OSM data, directly encoded in the URL, instead of coming from an external file. This is only suited for smaller data (some browsers limit the maximum URL length), but it is faster (since no download is required), and in many cases where dynamically generated data is needed, it's easier to generate.

GET /load_data?new_layer=(true/false)&layer_name=...&mime_type=...&data=...


Parameter Required/Optional Meaning
data R The XML data to load, this should be URL encoded in a way that also encodes the special characters &, = and ? to resp. %26, %3D and %3F. The JS encodeUriComponent() method provides this functionality out of the box.
new_layer O Chose to load the data in a new layer
mime_type O Mime type of the data, by default this is "application/x-osm+xml", which is currently the only supported mime type, but in the future other mime types could be supported
layer_name O Only valid when the data is loaded in a new layer; Gives JOSM a hint on how to name the layer


Open a local file in JOSM.

GET /open_file?filename=...


Parameter Required/Optional Meaning
filename R The local file to open in JOSM (Ie: /tmp/test.osm)


Instructs JOSM to add an imagery (WMS/TMS) layer.

GET /imagery?title=...&type=...&url=...


Parameter Required/Optional Meaning
url R The Request URL, including patterns. Must be the last parameter, everything after "&url=" is interpreted as URL, even if it contains "&" characters.
title O The display name of the layer
type O Type of the layer. Possible values are wms, tms and bing
(since RemoteControl Version 1.3)
cookies O
min_zoom O The minimum zoom level
(since RemoteControl Version 1.4)
max_zoom O The maximum zoom level. For higher scales, the images of the maximum level is enlarged
(since RemoteControl Version 1.4)

mandatory parameters: url optional parameters: title, type, cookies, min_zoom, max_zoom


  • TMS layer "osm"{zoom}/{x}/{y}.png


  • WMS layer "landsat"{proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}



Instructs JOSM to download objects with a given id.

GET /load_object?new_layer=true|false&objects=...


Parameter Required/Optional Meaning
objects R Comma separated list of object ids, e.g. "n1234,n1235,w84,r958493"
new_layer O If true, downloads to a new layer
addtags O Optional parameter to add tags. The key and value is separated by "=" and multiple tags can be separated by a Pipe "|". See details.
relation_members O If true, downloads objects members of the relations as well.
referrers O If true, downloads referrers of the object as well. I.e. parent relations, and for nodes, additionally, parent ways. (since r6782)




Instructs JOSM to create a new node at the given coordinates.

Note: This action requires the permission Create new objects which is disabled by default.

GET /add_node?lon=...&lat=...


Parameter Required/Optional Meaning
lon R The longitude of the node
lat R The latitude of the node
addtags since v1.5 O Optional parameter to add tags. The key and value is separated by "=" and multiple tags can be separated by a Pipe "|". See details.




Instructs JOSM to create a new way with new way nodes at given coordinates.

Note: This action requires the permission Create new objects which is disabled by default.

GET /add_way?way=lat1,lon1;lat2,lon2;...


Parameter Required/Optional Meaning
way R Pairs of latitude, longitude coordinates separated by semicolon.
addtags since v1.5 O Optional parameter to add tags. The key and value is separated by "=" and multiple tags can be separated by a Pipe "|". See details.




This command returns the current protocol version of the installed RemoteControl interface. Developers can use it to query for a running instance of JOSM and also determine whether the requested functionality is available in the client.

GET /version[?jsonp=callback]


Parameter Required/Optional Meaning
jsonp O Jsonp callback for older browsers not implementing ​Cross-Origin Resource Sharing (CORS)

The command returns a json object containing an application identifier that is always "JOSM RemoteControl", a major number and a minor number. Compatible protocol changes result in an increase of the minor number. Incompatible changes increase the major number. So a client application knowing of protocol version 1.0 can still talk to JOSM having 1.1. But it's not guaranteed to be working with 2.0. So the client should verify the major number.

A typical output looks like this:

   "protocolversion": {
      "major": 1, 
      "minor": 0
   "application": "JOSM RemoteControl"

For older browsers not implementing Cross-Origin Resource Sharing (CORS) the command provides the possibility for jsonp callback. Load the URL in a script tag and supply the name of a callback that will receive the JSON data.

Following is some sample code that checks for CORS capabilities and uses JSONP as a fallback solution.

// in addition to the CC-BY-SA of the wiki feel free to use the following source for any purpose without restrictions (PD)
// credits and additions appreciated:

function checkJOSM(version){
   alert(version.application + " uses protocol version " + version.protocolversion.major + "." + version.protocolversion.minor);
   // do something useful, maybe showing edit button

var url = "";
var useFallback = false;
// currently FF3.5, Safari 4 and IE8 implement CORS
if (XMLHttpRequest) {
   var request = new XMLHttpRequest();
   if ("withCredentials" in request) {'GET', url, true);
      request.onreadystatechange = function(){
         if (request.readyState != 4) {
         if (request.status == 200) {
            checkJOSM(eval('(' + request.responseText + ')'));
   else if (XDomainRequest) {
      var xdr = new XDomainRequest();"get", url);
      xdr.onload = function(){
         checkJOSM(eval('(' + xdr.responseText + ')'));
   } else {
      useFallback = true;
else {
   // no XMLHttpRequest available
   useFallback = true;

if (useFallback) {
   // Use legacy jsonp call
   var s = document.createElement('script');
   s.src = url + '?jsonp=checkJOSM';
   s.type = 'text/javascript';
   if (document.getElementsByTagName('head').length > 0) {

Adding, changing or deleting tags

Try this example: http://localhost:8111/load_and_zoom?addtags=wikipedia:de=Weiße_Gasse|maxspeed=5&select=way23071688,way23076176,way23076177,&left=13.739727546842&right=13.740890970188&top=51.049987191025&bottom=51.048466954325. (Works also with the zoom-command)

The user must review the tags and the selection before the tags are applied to the selected objects. If the tag exists on some objects, it will be can be replaced.

Since protocol version 1.5

  • add_node and add_way commands support addtags parameter
  • It is possible to use = character in value and all leading/trailing spaces are trimmed.

http://localhost:8111/add_node?lon=13.3&lat=53.2&addtags=natural=tree|name=%20%20%20==Great%20Oak== (creates node with natural=tree an name="==Great Oak==")

  • If empty value is found, tag is to be deleted from objects (checkbox-confirmation is needed)


Other commands

Remotecontrol allows other plugins to add additional commands. The other registers a RequestHandler class and specifies a command to be handled by this class. The command syntax has to be defined by the other plugin.

Reverter plugin since version 27091 makes use of this feature.

See also

Old JOSM Remote-Plugin page at OSM wiki

Back to Preferences
Back to Main Help

Last modified 10 days ago Last modified on Nov 16, 2014, 6:11:24 PM

Attachments (2)

Download all attachments as: .zip