A "hidden" feature in VLC (via the VLsub extension) allows you to search for and download subtitles directly while the video is playing.

Best for online videos. Just paste a link from YouTube, Viki, or Disney+, and it extracts the subtitles for you.

If your video file is named something like MovieName.1080p.BluRay.x264 , look for a subtitle file with a similar "tag" (e.g., BluRay or WEB-DL ) to ensure the text lines up perfectly with the audio.

If you prefer downloading files manually from a browser, these are the industry standards:

Always look for .srt files; they are the most compatible and easiest to edit if the timing is slightly off.

Likely what you're referring to. It lets you search for subtitles by filename or title and downloads them in .srt format, which works with almost any player.

The largest database available. It has a massive Italian section and even a request area for hard-to-find translations.