Migrate SQL Server binary datadump to postgresql I just got a very big dataset (+/-55GB) in a binary SQL Server format. 

Is there an easy way to import this file into a Postgresql Server? I found some converter-programs, but they 'only' convert from server to server and not file to file or file to server.

I don't have access to a SQL Server, so importing it and using this temporary as a source is not an option. Nor am I an expert in SQL Server programs...

I hope somebody here has a solution....
What you are seeing is SQL Server data pages in a backup file. Or a SQL Server data file (.MDF). Either way, is is a collection of 8k data pages.

These would be restored or attached to a SQL Server. 
They are not conveniently readable without a SQL Server install.

No SQL Server = no access to the data. Quite simple.

If you don't have access to a SQL Server install, why on earth do you have a SQL Server data file/backup? What do you or your source expect you to do with it?

So, your solution is clear: ask your source to export the data to CSV and provide the database design.Then you implement and import into PostgreSQL.