Quick Links:

  • Download the applet jar file from here
  • Parameters are described below
  • The javascript API is described here

Useful to know!!

  • Package all your data files into a single (or multiple) zip / jar files. This is very useful to reduce download time of large data files. The applet archive tag can take multiple entries separated by commas, eg
    <applet code="jalview.bin.JalviewLite" archive="jalviewApplet.jar, mydata.zip">
  • Use Jalview for input to a HTML form. For an example of how to code this using Javascript, click here.
  • Embed Jalview into the web page, without the "Start Jalview" button by setting the embed parameter to true;
    <param name="embedded" value="true">

** NEW FEATURES ** in Jalview 2.7.1

  • Jmol compatibility updated to Jmol 12.2.x series - download the JmolApplet here
  • To use Jmol as the structure viewer for Jalview, you must include the jar file in the applet archive argument thus:
  • Jmol 12.2.x requires at least Java 1.6 to run in the clients web browser. If the client does not have Java 1.6, or if the Jmol-12.2.jar is not added to the archive, the original Jalview structure viewer will still be available.

**NEW FEATURES** in Jalview 2.7

  • Javascript callbacks capabilities
    • oninit parameter and methods for registering javascript handlers for selections, mouseovers and linking to Jmol applets on the page.
    • To use javascript callbacks, ensure the applet tag includes the 'mayscript' attribute - either as a parameter (<param name="mayscript" value="true"/;gt;) or as a bare attribute in the applet html tag).
  • New jalviewLite java api methods for selecting, highlighting, scrolling and reordering sequences in an alignment view.

**NEW FEATURES** in Jalview 2.6

  • Jmol compatibility updated to Jmol 12.1.x series
  • Jalview 2.6 works only with Jmol version 12.1.13 or later. You can use the JmolApplet.jar from the Jmol binary distribution available at the Jmol Sourceforge site, or download the Jmol applet from here
  • Minimum recommended version of Java runtime for the applet is now 1.5 (JalviewLite v2.6 without the Jmol viewer may work ok on earlier Java environments but compatibility can no-longer be guaranteed).

**NEW FEATURES** in Jalview 2.5

  • New parameters to control display of tree annotation, width of alignment columns, and to disable the jalview button and check for Jmol on startup.

**NEW FEATURES** in Jalview 2.4

  • New applet API methods for feature display control, views, and obtaining current selection via javascript.
  • Group show and hide parameters: "showfeaturegroups" and "hidefeaturegroups". Both take a list of feature group names (separarated by "|" by default) to hide or show on the displayed alignment.
  • Regular expressions can be used in URL links for sequence IDs.
  • "debug" parameter to control verbosity of the applet's console output.
  • "showbutton" parameter to disable launch button and open JalviewLite immediatly.
  • "nojmol" parameter to disable check for Jmol classes.

**NEW FEATURES** in Jalview 2.3

  • Note that Parameter "PDBFile" now takes the PDB file followed by a space separated list of alignment sequence ids to associate the structure to. It is also possible to associate multiple PDB files by adding an incremental value to PDBFile (up to 10). It is also possible to map specific sequences to specific chains by using the following notation:

    <param name="PDBFile" value="First.pdb SeqA SeqB SeqC">

    <param name="PDBFile2" value="Second.pdb A=SeqA B=SeqB C=SeqC">
    <param name="PDBFile3" value="Third.pdb D=SeqX B=SeqY C=SeqZ">
  • Note parameter "PDBSeq" is no longer required.
  • Jalview 2.3 was updated to work with Jmol 11. See the versions archive if you want to download the old Jmol applet.

**NEW FEATURES** in Jalview 2.1
  • Jalview Applet can read and display JNet secondary structure annotation directly via the jnetfile parameter.
  • Param UserDefinedColour - specify your own colours for each residue using a semi colon separated list. Multiple residues can be assigned the same colour using commas. eg:
    <param name="userDefinedColour" value="D,E=red; K,R,H=0022FF; C=yellow">
  • Param showFeatureSettings - this will display the feature settings window when the applet starts.
  • Param Application_URL value="http://www.jalview.org/services/launchApp"
    This calls a servlet which creates a JNLP file with the alignment file, annotations file and features file of the applet as arguments. If the user has Java installed, the returned JNLP file should start up the full Jalview Application. BUT this does not currently work for alignment files added to the applet in a zip file.
  • Alignment file can be a series of parameters using eg PFAM format
    <param name="sequence1" value="Q93XJ9_SOLTU/11-26 TSFLPRKPVVTSLKAI">
    <param name="sequence2" value="FER1_PEA/14-29 TSFLRTQPMPMSVTTT">
    (All the usual Jalview File formats are valid, however each new line in an alignment file must be entered as a parameter)
<param name="" value=""> Description
file fileName The file to open, must be on same server as the applet.
sequence in (preferably) PFAM or Fasta format The alignment can be added as a series of sequences instead of from a file.
tree fileName Tree file in Newick format
features fileName Jalview Features file to be applied to the alignment
annotations fileName Jalview Annotation file will be added to the alignment
jnetfile fileName Secondary structure predictions from a Jnet Concise file will be added to the first sequence in the alignment.

fileName seq1 seq2 seq3


fileName A=seq1 B=seq2 C=seq3

PDB file which is to be associated with a sequence, followed by space separated list of alignment sequence ids. PDB chains can be specifed to map to particular sequence by using A=SeqA notation

*Not needed post Jalview 2.3, use PDBFile instead

SequenceId The sequence to associate a PDB file with. Note the value is case sensitive.
defaultColour One of:
Clustal, Blosum62, % Identity, Hydrophobic, Zappo, Taylor, Helix Propensity, Strand Propensity, Turn Propensity, Buried Index, Nucleotide
Default is no colour.

D,E=red; K,R,H=0022FF; c=yellow

Define residue colours
showFullId true or false if true displays start and end residue at the end of sequence Id.
showAnnotation true or false If true shows the annotation panel below the alignment.
showConservation true or false Default is true.
showQuality true or false Default is true.
showConsensus true or false Default is true.
sortBy Id , Pairwise Identity, or Length Sorts the alignment on startup
RGB colour as hex string Background colour for applet button - purely cosmetic to blend in with your web page. For orange, enter the value FF6600
embedded true or false The applet is embedded in the web page, the "Start Jalview" button is not displayed.
windowWidth value frame width
windowHeight value frame height
label label text Change text for the Launch Jalview Button
wrap true or false Opens new windows in wrapped mode
linkLabel_1 Uniprot

Right click on sequence id to see list of available links. Any new links MUST have $SEQUENCE_ID$ as part of the linkURL_n value. For multiple links, increment the label and url name by 1. ie
<param name="linkLabel_2" ...,
<param name="linkUrl_2"....

Regular expressions may also be used (since Jalview 2.4) to process the ID string inserted into the URL:
$SEQUENCE_ID=/<regex to extract ID>/=$
Use the debug flag to check parsing and make sure that special symbols are properly escaped (particularly when generating applet tags from CGI scripts).
Regex URL links are also applied to the description line (since Jalview 2.4.+).



showFeatureSettings true or false Shows the feature settings window when starting the applet
showfeaturegroups separator separated list of feature groups Display the features in the given groups on the alignment
hidefeaturegroups separator separated list of feature groups Hide the features in the given groups on the alignment (will be overridden by showfeaturegroups for group names found in both lists)

URL of dynamic JNLP servlet,


Launches full application with original alignment, features and annotations files used in applet
separator non-empty separator string
default: |
string used to separate fields in list parameters (such as showfeaturegroups)
debug true Instruct the applet to output additional debug messages to the java console
nojmol false When set, do not try to find Jmol classes. Set this to supress URL not found errors appearing in server logs when Jmol is not available.
showbutton true Show the jalview button on the page. When false, JalviewLite will open immediately.
sortByTree true or false (default is false) automatically sort the associated alignment view by the tree when a new tree is opened.
showTreeBootstrapstrue or false (default is true)show or hide branch bootstraps
showTreeDistancestrue or false (default is true)show or hide branch lengths
showUnlinkedTreeNodestrue or false (default is false)indicate if unassociated nodes should be highlighted in the tree view
heightScale 1.0 or greater Adjust the height of each cell in the alignment grid relative to the height of a character in the alignment font. (since 2.5.1)
widthScale 1.0 or greater Adjust the width of each cell in the alignment grid relative to the width of a character in the alignment font. (since 2.5.1)
centrecolumnlabels true of false (default is false) When true, text labels associated with a column in the alignment will be shown centered with respect to the column. (since 2.4)
showUnconserved true of false (default is false) When true, only gaps and symbols different to the consensus sequence for a column will be shown. Useful for visualizing alignments exhibiting low sequence variation, where it is important to highlight mutations. (since 2.5)
upperCase bold or other value Indicate a text style to apply to uppercase sequence symbols. Currently, only bold is supported.
automaticScrolling true of false (default is true) When true, alignment panels will automatically scroll to show any regions of the alignment highlighted due to javascript events or when mousing over a position in an associated structure. (since 2.6)
showGroupConsensus true of false (default is false) When true, shows consensus annotation row for any groups on the alignment. (since 2.7)
showGroupConservation true of false (default is false) When true, shows amino-acid property conservation annotation row for any groups on the alignment. (since 2.7)
showConsensusHistogram true of false (default is true) When true, shows the percentage occurence of the consensus symbol for each column as a histogram above the consensus sequence row. (since 2.7)
showSequenceLogo true of false (default is false) When true, shows a sequence logo above the consensus sequence (overlaid above the Consensus Histogram, if visible, with symbols coloured using the alignment's default colourscheme). (since 2.7)
oninit after_init() name of javascript function that will be called after the jalviewLite instance has completed its initialisation. (since 2.7)
relaxedidmatch true or false (default is false) When true, use stem based matching to identify sequences that match features imported from a GFF or Jalview sequence features file, and for associating PDB data (passed on PDBfile parguments) with sequences (based on a given destination sequence ID). (since 2.7)
alignpdbfiles true or false (default is false) When true, and jalviewLite is able to use jmol as a structure viewer, attempt to show a superposition of all structures loaded onto the alignment, superimposed using the aligned regions of corresponding sequences. [experimental] (since 2.7)
externalstructureviewer true or false (default is false) re-route jmol colouring commands, selection and mouseover events to an external viewer using javascript callbacks. [experimental] (since 2.7)
annotationcolour_max colour name or RGB hex triplet (default is red) Default colour used for maximum value when shading by annotation. (since 2.7)
annotationcolour_min colour name or RGB hex triplet (default is orange) Default colour used for minimum value when shading by annotation. (since 2.7)
jalviewhelpurl absolute or relative url or javascript function prefixed by javascript: (default is http://www.jalview.org/help.html) Optional parameter allowing modification of the default Jalview Help URL normally opened when JalviewLite's 'Help' menu item is selected. (since 2.7)
resolvetocodebase True or False (False) Set to true to re-instate pre-JalviewLite 2.7 behaviour where relative URLs were prepended with the applet 'codebase' rather than the current document base URL before resolution. (since 2.7)
scoreFile file Multiple sequences aligment scores file. Currently is supported only the T-Coffee score_ascii file format