Opening a SEA File

The SEA file type is primarily associated with StuffIt.

SEA	File extension: SEA
	File type:	self-extracting archive

What is a SEA file

SEA files mostly belong to StuffIt by Smith Micro. SEA is a compressed archive file that unpacks itself when it is opened. It is an archive file but it's stored as a program, meaning it contains a command or instructions on how to proceed with the extraction. The file is usually created by StuffIt SEA Maker from Smith Micro. Other old utilities that can create these files include Compact Pro and the Disc Doubler which were built for Mac OS.

Automatic extraction: If a user opens the file, it uncompresses itself and all its contents. This will mean that a decompressing tool is not needed during extraction.
Accessing Files: Since SEA files are self-extracting there won't be any need for an extraction program unless this is done on MacOS. A problem might occur when trying to open SEA files on Mac OS X specifically when the files were built by Mac OS 9 or any older versions. This problem can be overcome by changing the file extension to SIT, which can also be helpful when dealing with Windows. Nonetheless, these files are compatible and can be opened by a free decompressing program such as StuffIt Expander because SEA files were generated by StuffIt.

How can I open a SEA file?

You need a suitable software like StuffIt to open a SEA file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your SEA file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a SEA file directly in the browser:. Just drag the file onto this browser window and drop it.

Online SEA Text Viewer

Choose your .sea file to analyze

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Programs that open and convert SEA files:

StuffIt by Smith Micro
See the previous paragraphs to learn more about the main application. SEA files are often referred to as StuffIt executables because this type of file is primarily created or used by this software.
SCS Programs (Data Related To SCS Encryption Methods) by Standby Computer Systems
Binary/DAT file. SCS Programs will cease to funtion without this file.
The Unarchiver (self-extracting archive) by MacPaw
The Unarchiver is a file archiving software for macOS. It can create and unpack archives of several formats, including SEA. A SEA file is a self-extracting archive that is an executable program. Upon execution on a supported operating system, the contents of the archive are extracted. If the operating system does not support the execution of SEA files, they can be extracted using an archiver such as The Unarchiver (some versions of The Unarchiver may not support the SEA format). This file format is classified as Executable. Related links: The Unarchiver on Wikipedia, Command-line Version of The Unarchiver for Windows and Linux, How to Unpack SEA Files Using The Unarchiver

SEA file format details:

If you know the file format, you can also find out how to open or edit the file. The first characters in a file identify the file format, for example, HTML files start with the bytes <html>. File extension, signature and file format must match; otherwise errors will occur when the file is opened. If there are problems opening a file, you must first determine the file format used. Our evaluation of the SEA files looks like this:

SEA is rarely used as a file extension and includes various formats for various programs. The file formats most commonly found in SEA files are:

25% of all SEA files use the same file format, which have the signature StuffIt (c)1997-. These are binary files, so they do not contain words or text. SEA files can be up to 92 MB in size, but are often around 44 KB - 8 MB. The file type was developed 20 years ago and is still in use today. The following keywords are characteristic: Reserved and StuffIt (c)1997-1998 Aladdin Systems, Inc., http://www.aladdinsys.com/StuffIt/.
20% of all SEA files start with the bytes SIT!, which are crucial for this file format. They consist of illegible, cryptic characters. The files are 17 KB to 2 MB in size, with a median of 440 KB. Certain words are almost always found in the files, such as SIT! and rLau.

All the rest of the SEA files (55%) have different formats, the following 3 formats exist: SEA. Tagged as blade. If you want to find out what your SEA file contains, drag and drop it onto this page.

Technical Data for SEA File Extension

File classification:

Executable

Related files:

hqx, sit, tjs, 1, sitx

Mime type:

application/x-sea

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

ProgramID: StuffItArchive, FileType: Aladdin StuffIt Archive, AppName: Aladdin Expander

ProgramID: StuffItArchive
EXEFile: f:\Cserve\Download\Aladdin systems\Expander.exe %1

ProgramID: StuffItArchive
EXEFile: %ProgramFiles%\Aladdin Systems\StuffIt 7.0\Expander\Expander.exe %1

ProgramID: StuffItArchive
EXEFile: %ProgramFiles%\WinZip\winzip32.exe %1

ProgramID: StuffIt.Compressed.File.Expand
EXEFile: %ProgramFiles%\Allume Systems\StuffIt\stuffit.exe -expand %1 -from_shell -override_open_tutorial

ProgramID: StuffIt.Compressed.File.Expand
EXEFile: %ProgramFiles%\Aladdin Systems\StuffIt 7.5\stuffit.exe -expand %1 -from_shell

ProgramID: StuffItArchive
EXEFile: %ProgramFiles%\Aladdin Systems\StuffIt 7.0.2\Expander\Expander.exe

ProgramID: StuffIt.Compressed.File.Expand
EXEFile: %ProgramFiles%\Smith Micro\StuffIt\stuffit.exe -expand -from_shell -override_open_tutorial

Show all 8 listings To Top

a sea self-extracting archive is a special file format by Smith Micro and should only be edited and saved with the appropriate software.

How to solve problems with SEA files

Associate the SEA file extension with the correct application.
Update your software that should actually open self-extracting archives. Because only the current version supports the latest SEA file format. Search, therefore, e.g. on the Smith Micro manufacturer website after an available StuffIt update.
To make sure that your SEA file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .SEA file online - secure, fast, and no downloads needed.