Tool – Alterntive

CometDocs

Airmail

ProtonMail

ALTO Mail

Thunderbird

Mailbird

Hushmail

Zoho Mail

Yahoo! Mail

Mail.com

GMX

WinZip

Yandex.Mail

File Converter

Convertio

FileZigZag

Online Convert

YouConvertIt

Fileminx

Format Factory

Convert Files

Cloud Convert

AConvert