Introducing Jellyfin Easy Metadata Manager

[darkneo86]

Can this (or anything, even a script, although I'm having trouble being successful with one?) help me edit tags for liveTV channels based on the 'group title' in the m3u?

[gleneingram]

Having troubles installing JEMM using command java -jar jemm_runnable-jar-with-dependencies.jar on my SYNOLOGY NAS.

getting "Exception in thread "main" java.lang.InternalError: java.lang.reflect.InvocationTargetException
"

suggestions?

[cesar_bianchi]

Hi everyone!!!

I'm happy to announce that I've released the version 1.2.2 of "Jellyfin Easy Metadata Manager".

The version 1.2.2 contain few updates and adjustments, like:

1 - New Footer bar;
2 - New "Message Waiting" dialog showed while something are background processed
3 - Reports: New feature to able users to print reports about Media Itens and Metadata or save then in preferred format;
4 - New Fetaure: Import and Export Tool - To help users provide a lot of changes quikly using csv or sheet files
5 - Bug Fixes

Please, let me know if you have ideas about new features or found a bug!

If you want to know more about the tool, see: https://github.com/CesarBianchi/Jellyfin...ataManager

So, I hope you like it!

[cesar_bianchi]

Looks great! Can the tool be used to batch edit metadata (say, tags) for multiple files across different folders or does it only work for a given folder and its files/subfolders?

Through the graphical interface, only metadata for files in the same folder/library is available. But starting with version 1.2.2, you can also do this by exporting and importing metadata via CSV files - this way, you can use your favorite CSV editor to edit multiple files in different folders at once.

---

Does this application edit the metadata of the files directly, which is then read by Jellyfin?

Or does it edit the values within Jellyfin itself?

It edits the metadata and tags read by Jellyfin, not the files themselves. This is because we follow the same metadata management standard as Jellyfin.

[cesar_bianchi]

Looks great! Can the tool be used to batch edit metadata (say, tags) for multiple files across different folders or does it only work for a given folder and its files/subfolders?

It appears you can mass add tags and genres to Libraries and their contents, however there isn't a way to remove them in mass. Unless maybe you add all existing tags to the parent folder and hit 'Apply for folder and contents' and then remove the tags from the parent folder and hit the button again. Either way unless you have all your content separated into folders for each tag or genre you want to add it is pointless. There is no way to add or select multiple individual files to then mass edit them.

Not that I have done anything with this as I too also just get a loading icon and nothing ever happens in the program or outside of it. Which is all very sad because this is very close to what I have always dreamed of for Jellyfin metadata editing..

Does this application edit the metadata of the files directly, which is then read by Jellyfin?

Or does it edit the values within Jellyfin itself?

Right now you can do it, use the options "Export" and "Import" to generate your libraries details in a CSV file, then edit the file using your favorite text editor (like MS-Excel or Notepad++) and then import it!


I am assuming it edits the values within Jellyfin since it auto-populates with your Libraries and playlists, showing their contents as sub-folders. Could be wrong though.

[cesar_bianchi]

🎉 JEMM User Manual Now Available! 📘

We’re excited to announce the official release of the JEMM User Manual — your complete guide to mastering metadata management for Jellyfin!

Whether you're just getting started or you're a power user managing large libraries, this manual covers everything you need to know, including:

✅ How to use Export and Import CSV features 
✅ Detailed breakdown of all Report types (Inventory, Genres, People, Studios, Tags, Year) 
✅ Smart editing tips and metadata best practices 
✅ Performance insights and processing time expectations 
✅ Step-by-step instructions with clear explanations

🧠 Designed to be practical, auditable, and user-friendly, the manual empowers you to take full control of your Jellyfin instance with confidence and precision.

📍 You can access the JEMM User Manual here

Thanks to everyone in the community who helped shape this release with feedback and testing. We hope it makes your JEMM experience even more powerful!