How to NppFTP with SSH key?

Question

I created a profile with the next options

Connection:

• Hostname: ftp.example.com
• Connection Type: SFTP
• Port: 22
• Username: wwwexample
• Password: ******
• Ask for password: no

---

Authentication:

• Try private key file authentication: yes
• Try password key authentication: no

• Try keyboard interactive authentication: no

• Private key file: D:\WORK\EXAMPLE\KEYS\wwwexample.ppk

• Passphrase: ************
• Ask every time: no

---

When I try to connect, NppFTP just says connecting and then disconnected. I created the private key with Puttygen, the same key I use for Fillezilla with Pageant (which works).

Answer 1

Stolen from a comment by @TOOGAM

"Use PuTTYGen to convert that PPK file to the more widely-supported OpenSSH key format."

1. Open the current SSH private key in PuTTYGen
2. File menu "Conversion"
3. Convert to OpenSSH (first option)
4. Done.

Answer 2

Use the *.pem file with this format:

-----BEGIN RSA PRIVATE KEY-----
56767567567jhfhfhfghfgghf5464bdf546/56//56565656566fghr656546546546546546546
..
..
-----END RSA PRIVATE KEY-----