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SeaView - Multiplatform GUI for molecular phylogeny

Version 4.7

NEW: bootstrap support optionally with the "Transfer Bootstrap Expectation" method
NEW: trimming-rule to shorten long sequence names in phylogenetic trees
NEW: 64-bit version for the MS Windows platform
NEW: multiple-tree windows
NEW: seaview uses PHYLIP v3.696 to compute parsimony trees
NEW: seaview can be run without GUI using a command line
NEW: seaview drives the PhyML v3.1 program to compute maximum likelihood phylogenetic trees.
NEW: seaview drives the Gblocks program to select blocks of conserved sites.
NEW: seaview drives the Clustal Ω v1.2 program to perform multiple sequence alignment.

SeaView is a multiplatform, graphical user interface for multiple sequence alignment and molecular phylogeny.

Screen shots of the main alignment and tree windows. Dialog window to perform Maximum-Likelihood tree-building.
On-line help document.Old seaview version 3.2

Download SeaView

Logo AppleMacOS X
Logo Linux32-bit Linux on x86
64-bit Linux on x86_64
Logo Windows MS Windows 100% FREE award granted by Softpedia
self-extractible archive
Logo SolarisSolaris on SPARC
source code

(also available in

Change log

Note for MS Windows users: The downloaded file (seaview4.exe) is a self-extracting archive: open it, and it will create a folder called seaview4 on your computer. The window that appears when you open seaview4.exe allows you to choose where to place the seaview4 folder. This folder contains the seaview program, an example data file, a .html file, and 4 other programs (muscle, clustalo, phyml, Gblocks) that seaview drives. This folder contains also seaview64bits.exe, a 64-bit version of the seaview program. If you run a 64-bit version of MS Windows (typically Windows 7, 8, or 10), you can discard seaview.exe and use seaview64bits.exe.

Note for Linux/Unix users: The downloaded archives contain the seaview executable itself, an example data file, a .html file, and 4 other programs (muscle, clustalo, phyml, Gblocks) that seaview drives. These 4 programs and the .html file can either be left in the same directory as seaview, or be put in any directory of your PATH.


If you use SeaView in a published work, please cite the following reference:

Gouy M., Guindon S. & Gascuel O. (2010) SeaView version 4 : a multiplatform graphical user interface for sequence alignment and phylogenetic tree building. Molecular Biology and Evolution 27(2):221-224.