MHT File Converter

Converts MHT/MHTML files to HTML or other formats for developers, researchers, and archivists needing accessible web archives.

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About This Tool

This tool converts MHT/MHTML web archives into accessible HTML or alternative formats. It analyzes the MIME envelope, decodes embedded resources, and reconstructs a coherent document suitable for modern environments. The output can be a standalone HTML file with inlined resources or an HTML file with a separate resource package, and optionally a PDF export. By preserving the original structure, media, and links when possible, it enables reliable migration of legacy pages and offline archives. The concept centers on deterministic translation of archived content without relying on remote rendering. The tool is valuable to digital librarians, researchers, and developers who need reproducible exports from browser archives and who require formats compatible with current workflows. Core features include MIME parsing, resource extraction, path normalization, and configurable inlining versus linking of assets. Typical workflows involve archiving university sites, preserving client pages, or exporting web records for analysis. Unique value lies in offline reliability, predictable outputs, and flexible packaging of resources. Typical use cases include migration to standards-compliant HTML, offline viewing, and content analysis for research or curation.

How to Use

  1. Provide inputs: Upload or select the MHT/MHTML file to convert.
  2. Choose output: Select HTML, standalone HTML with embedded resources, or PDF.
  3. Run conversion: Start the process to perform MIME parsing and reconstruction.
  4. Retrieve outputs: Download the HTML file and any resource package, or the PDF.
  5. Validate results: Check embedded images, styles, and links render correctly.
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Frequently Asked Questions

Find Quick Answers

What inputs does this tool accept?
The tool accepts MHT and MHTML files, which are browser-generated archives containing HTML plus embedded resources. It does not process other container formats. Large archives are supported, though extremely large files may require batch processing.
Can I preserve embedded resources like images and CSS?
Yes. Resources can be inlined within the HTML or saved as a separate resource package. The tool preserves as much of the original structure as possible and maps resource references to the chosen output strategy.
Is the tool offline?
Yes. The conversion operates without external network calls, making it suitable for secure environments. Data remains within your deployment context unless you choose to export to a cloud-based instance.
What outputs are supported?
Primary output is HTML. You can also generate a standalone HTML with embedded resources or export as PDF. Optionally, a packaged set of resources alongside the HTML can be produced for easier deployment.

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