How do I open a .filepart file?

You cannot — it is an incomplete download. Resume it in the browser or download manager that created it so it can finish and rename.

Can I just rename a .filepart to remove the extension?

No. The file is only partially downloaded, so renaming it will not produce a working file.

Is it safe to delete a .filepart file?

Yes, if you do not plan to resume the download. It only holds an unfinished, unusable copy.

Which programs make .filepart files?

Firefox and download managers like JDownloader use .filepart for in-progress downloads.

What Is a .FILEPART File?

A download left a .filepart file and you cannot open it. It is a partial, unfinished download. Here is how to complete it or clear it safely.

What a .filepart file is

A .filepart file is a partly downloaded file. Firefox, JDownloader, and some other download managers write to a .filepart and rename it to the real name only once the download finishes. If you see one, the transfer did not complete.

Why you have one

The download was paused, interrupted, or cancelled — a dropped connection, a closed browser, or a stopped download manager. The .filepart holds however many bytes arrived so far.

How to open or finish it

You cannot open a .filepart directly — it is incomplete. The fix is to resume the download in the same tool that started it, so it can append the rest and rename the file. In Firefox, reopen the Downloads panel and click retry/resume. In JDownloader, restart the link. If the source is gone, the partial file is unusable and you must download again.

Is it safe to delete?

Yes, if you do not plan to resume. Deleting a .filepart just discards a broken, incomplete download and frees the space. Only keep it if you intend to continue the transfer.

How to handle a .filepart file by OS

Windows / macOS / Linux: behaviour is the same — resume in the download tool to finish it, or delete the .filepart to abandon it. Renaming it to remove .filepart will not make an incomplete file work.

Common problems

A .filepart that never finishes usually means the server dropped the connection. Delete it and start the download again, ideally with a download manager that supports resuming.