Open .mht Files Online — Free MHT Viewer
Open MHT 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 .mht File?
A .mht file is a web format known as MHT. MHTML Web Archive This format is created by Microsoft and is widely used by professionals.
MHT files contain structured web data that requires compatible software to open. With OpenAnyFile, you can preview and validate .mht files directly in your browser without installing any software.
How to Open .mht Files Online
- Visit OpenAnyFile MHT page
- Drag and drop your .mht file onto the upload area, or click "Browse" to select it
- OpenAnyFile automatically detects the MHT format using magic byte analysis
- View, analyze, and preview and validate your file contents in the browser
- Optionally convert to HTML, PDF or download
Software That Opens .mht Files
.mht files are primarily created by Microsoft. In the web space, you may encounter .mht files from third-party tools, online converters, or export functions. Regardless of the source, OpenAnyFile handles them all.
Open .mht on Different Platforms
- Windows: Use the original software or upload to OpenAnyFile for instant access
- macOS: Preview may not support .mht — 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 .mht File Problems
Browser rendering
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 MHT to Other Formats
MHT files can be converted to 2 formats including HTML, PDF.
Related Web Formats
If you work with .mht files, you may also encounter these web formats:
- AMP HTML (amp.html) — Open & convert amp.html files online
- Apple Touch Icon (apple-touch-icon.png) — Open & convert apple-touch-icon.png files online
- Atom Feed (atom.xml) — Open & convert atom.xml files online
- Caddy Config (Caddyfile) — Open & convert Caddyfile files online
- CSS (.css) — Open & convert .css files online
- Favicon (favicon.ico) — Open & convert favicon.ico files online
- HAR (.har) — Open & convert .har files online
- htaccess (.htaccess) — Open & convert .htaccess files online
- HTACCESS (.htaccess) — Open & convert .htaccess files online
- HTM (.htm) — Open & convert .htm files online
Popular MHT Conversions
Frequently Asked Questions
What is a .mht file?
A .mht file is a web format called MHT. MHTML Web Archive
How do I open a .mht file without installing software?
Upload your .mht file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.
What program creates .mht files?
.mht files are typically created by Microsoft.
Can I convert .mht to another format?
Yes. OpenAnyFile converts .mht to HTML, PDF.
Is it safe to open .mht files online?
Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.
Can I open .mht on my phone?
Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.