MHTML to RTF Converter
Convert MHTML to RTF online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
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Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.
What is an MHTML file?
MHTML stands for MIME Encapsulation of Aggregate HTML Documents, a standard defined by RFC 2557 for archiving web content. Functionally identical to the .mht extension, MHTML files utilize the Multipurpose Internet Mail Extensions (MIME) protocol to bundle a webpage's structure (HTML) and dependencies (CSS, images) into a single archive, facilitating offline viewing and email transfer of complex web layouts.
How to open an MHTML file
Primary support exists within Microsoft-based browsers like Edge and Internet Explorer. Users on macOS or Linux may use browsers such as Vivaldi or Opera, which maintain strong compatibility. Alternatively, changing the extension to .eml allows some email clients to display the content as a message body.
MHTML Technical Info
- Full Name
- MIME Encapsulation of Aggregate HTML
- Developed By
- IETF Working Group
- Initial Release
- 1999
- MIME Type
- application/x-mimearchive
What is an RTF file?
The Rich Text Format (RTF) is a proprietary document file format with published specifications developed by Microsoft Corporation in 1987 for cross-platform document interchange. It encodes formatted text and graphics using 7-bit ASCII characters, utilizing a structure of control words, control symbols, and groups to define formatting properties such as bolding, italics, and fonts. Unlike binary formats, RTF is human-readable and was designed to facilitate interoperability between different word processing software and operating systems before the standardization of XML-based formats.
How to open an RTF file
Due to its design as an interchange format, RTF possesses native support across almost all major operating systems without requiring third-party installation. Microsoft Windows opens RTF files natively with WordPad or Microsoft Word, while macOS utilizes TextEdit. For Linux users or cross-platform consistency, LibreOffice Writer and Apache OpenOffice provide robust handling of the format's styling attributes.
RTF Technical Info
- Full Name
- Rich Text Format
- Developed By
- Microsoft Corporation
- Initial Release
- 1987
- MIME Type
- application/rtf
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Why RunConvert
The fastest way to convert any file
Purpose-built for speed, privacy, and breadth of format support.
Convert MHTML to RTF in seconds
Every MHTML to RTF conversion runs on our servers, so your device stays fast and the output quality stays intact.
Fast, cloud-powered
No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.
Secure & private
Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.
Free - no account needed
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Developer API
Convert MHTML to RTF via API
Automate MHTML to RTF conversions in three steps: create a job, upload your file, then poll for the result.
# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"tag": "mhtml-to-rtf",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "rtf"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.mhtml
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
-H "Authorization: Bearer YOUR_API_KEY"Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.