you can try https://www.seektable.com https://www.seektable.com which has 'flat table' reports for data browsing and postgresql connector; however this is cloud

you can try https://www.seektable.com https://www.seektable.com which has 'flat table' reports for data browsing and postgresql connector; however this is cloud tool and your DB should be accessible by tool's server. BTW, CSV files are also supported.