Open .mhtml Files Online — Free MHTML Viewer
Open MHTML File Online — Free & Instant
No signup required. Works in your browser.
📁 Drag & drop your file here
or click to browse • Max 100MB
✅ Free • ⚡ Instant • 🔒 Secure • 💻 No install
What Is a .mhtml File?
A .mhtml file is a email format known as MHTML. MIME HTML Archive This format is created by Microsoft and is widely used by professionals.
MHTML files contain structured email data that requires compatible software to open. With OpenAnyFile, you can read and archive .mhtml files directly in your browser without installing any software.
How to Open .mhtml Files Online
- Visit OpenAnyFile MHTML page
- Drag and drop your .mhtml file onto the upload area, or click "Browse" to select it
- OpenAnyFile automatically detects the MHTML format using magic byte analysis
- View, analyze, and read and archive your file contents in the browser
- Optionally convert to HTML, PDF or download
Software That Opens .mhtml Files
.mhtml files are primarily created by Microsoft. In the email space, you may encounter .mhtml files from third-party tools, online converters, or export functions. Regardless of the source, OpenAnyFile handles them all.
Open .mhtml on Different Platforms
- Windows: Use the original software or upload to OpenAnyFile for instant access
- macOS: Preview may not support .mhtml — use OpenAnyFile as a universal viewer
- Linux: Open-source alternatives exist, or use OpenAnyFile in any browser
- Mobile (iPhone/Android): OpenAnyFile works on all mobile browsers
Common .mhtml File Problems
Browser rendering differences
Other common issues include: your OS not recognizing the file extension, the file appearing corrupted after download, or lacking the required software. OpenAnyFile bypasses all these issues with universal format detection.
Convert MHTML to Other Formats
MHTML files can be converted to 2 formats including HTML, PDF.
Related Email Formats
If you work with .mhtml files, you may also encounter these email formats:
- EML (.eml) — Open & convert .eml files online
- EML2 (.eml) — Open & convert .eml files online
- EMLX (.emlx) — Open & convert .emlx files online
- LDIF (.ldif) — Open & convert .ldif files online
- MBOX (.mbox) — Open & convert .mbox files online
- MSG (.msg) — Open & convert .msg files online
- MSG2 (.msg) — Open & convert .msg files online
- OST (.ost) — Open & convert .ost files online
- OST2 (.ost) — Open & convert .ost files online
- P7S (.p7s) — Open & convert .p7s files online
Popular MHTML Conversions
Frequently Asked Questions
What is a .mhtml file?
A .mhtml file is a email format called MHTML. MIME HTML Archive
How do I open a .mhtml file without installing software?
Upload your .mhtml file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.
What program creates .mhtml files?
.mhtml files are typically created by Microsoft.
Can I convert .mhtml to another format?
Yes. OpenAnyFile converts .mhtml to HTML, PDF.
Is it safe to open .mhtml files online?
Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.
Can I open .mhtml on my phone?
Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.