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THE FILE FIELD GUIDE
.mhtml

Single-file Web Archive

Web & Development

MHTML packages HTML and resources using MIME. It is a saved snapshot; authentication, video and interactive behavior may not survive.

Main use
Read a saved web page with bundled resources
Data type
Text data
All sections, questions and sources

Content reviewed： · Editor：Kai

Opening steps

Choose your environment or purpose to see its steps.

MHTML-capable browser such as Edge

Preserve the original and inspect a working copy in a compatible application.

  1. Open a copy through a compatible browser’s file-opening command.
  2. Check the capture date, original URL, text and images.
  3. For a reading copy, inspect the print preview and page range.
Inspect the received file and its requirements

Establish dependencies and settings before proceeding.

  1. The .mht suffix is related, but plain HTML has a different structure.
  2. Identify parts that still require network access or login.
  3. Compare the capturing and receiving browser versions.

Menu labels and support vary by app, OS and version. Preserve the original before making changes.

Troubleshooting by symptom

  • Raw text appears: open inside a supporting browser.
  • Images missing: request a new capture after the original finishes loading.
  • Login fails: use the live site rather than expecting archived authentication.
  • Print cropped: check scale, paper and margins.

MHTML → PDF

  1. Print the opened snapshot to a separate PDF.
  2. Reopen the output and check it against the preservation points in this guide before handoff.

PDF does not preserve live forms, all link behavior or later site updates.

Establish the capture boundary

Inspect figures, table endings and collapsed content rather than assuming the visible browser state was captured completely.

Source for these steps：RFC Editor · RFC 2557 — MHTML / Microsoft · Local MHTML files in Microsoft Edge

Worked example: checks before handoff

Example: for an application receipt, verify the reference number and date and retain the private original locally.

Source for these steps：RFC Editor · RFC 2557 — MHTML / Microsoft · Local MHTML files in Microsoft Edge

Related-format differences

Related-format differences
Format / methodPurpose and preserved information
.mhtmlRead a saved web page with bundled resources
HTMLPlain HTML may reference resources stored separately.
MHTML → PDFPDF does not preserve live forms, all link behavior or later site updates.

Handling and security

Review external-access prompts and avoid entering credentials into an unknown archived page.

Questions and answers

Is .mht unrelated?

It is another suffix used for MHTML.

Is offline reading guaranteed?

It depends on capture completeness and external references.

Can it restore the original website?

Server logic and databases are not included.

Format facts: name, steward and MIME type
Formal name
Single-file Web Archive
Steward / specification
RFC Editor
MIME type
Consult the producer or delivery system. The extension alone does not establish a MIME type.

Primary and official sources