Highest compression for files(for web transfer)? - Super User

I have seen some highly compressed files around, such as 700MB of data compressed to around 30-50MB. But how do you get such compressed files? I have tried using software like WinRAR and 7Zip but

How to Send Large Files 2024: Free & Paid Options Explained

10 Image Optimization Tips for Your Ecommerce Site in 2024 - Shopify

5 Best File Compression Software & Useful Tips [2024]

Benchmarked: What's the Best File Compression Format?

Difference Between Data Encryption and Data Compression - GeeksforGeeks

Compressed Folder larger than uncompressed??? : r/Windows11

compression - Compress a 1GB file into 200_MB? - Super User

Highest compression for files(for web transfer)? - Super User

Best file compression software of 2024