Mail File Viewer vs PDF ProMaster

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Mail File Viewer compared with PDF ProMaster
Detail	Mail File Viewer	PDF ProMaster
What it does	Read email files privately in your browser with no upload	Free online PDF tools that run in your browser with no uploads or sign-up required
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	GB
Pricing model	Free	Free
Pricing	Not given	Not given
Key features	Read winmail.dat and EML files in browser View embedded images safely Preview PDF attachments Download attachments individually or as ZIP No file uploads to server Display sender, date and message content	Merge PDFs Split and extract PDF pages Compress PDF with custom file size Convert between PDF and Word, Excel, PowerPoint Convert images to and from PDF Edit PDF text and add content Sign PDF with signature OCR scanned PDFs Protect PDF with password Rotate, reorder and delete pages
What makes it different	All processing happens in your browser with no uploads Private handling of email attachments Outlook hides Safe display of external images with user permission	Files processed entirely on your device, never uploaded to servers No account, sign-up or tracking required 31 tools in one place for all PDF jobs Works on any device with a modern browser No watermarks or daily limits
Community votes	0	0
DR (Domain Rating by Ahrefs)	Not checked yet no change since last check	Not checked yet no change since last check
Trust Flow (Majestic)	2	0
Citation Flow (Majestic)	19	13
Referring domains (Majestic)	6	1

4 details filled in for both companies.