Why Open Word Just to View One Formula? Meet MathViewer

MathViewer logo

As of April 2026, the publicly available build is MathViewer v0.1.6 for Windows.

If you have ever received a .mathml or .mml file and only wanted to see the formula inside, you probably know this friction already.
What should be a tiny task often turns into installing a full office suite.

The quiet problem many people tolerated

MathML and MML are standard structured formats for mathematical expressions. They are common in educational material, scientific publishing, and learning platforms.
Yet for a long time, simply viewing those files often meant opening Microsoft Word or LibreOffice.

That is a bit like installing a heavy image editor just to preview one picture.

Quick size context: LibreOffice is around 300 MB, and Microsoft Word usually comes as part of a 3-4 GB suite. MathViewer is only a few megabytes and focuses on one job: showing formulas.

What MathViewer is

We built MathViewer at Shikou Core for one specific purpose:

  • Open .mathml and .mml files quickly
  • Remove unnecessary dependence on full office packages
  • Keep the workflow simple: install, open, inspect

We provide it for free and keep it focused on this single practical need.

Licensing, in plain words

I understand why the word “license” can sound intimidating around free software. In our case, it is straightforward:

  • You can use MathViewer for free as an end user
  • We keep copyright and commercial redistribution rights as the creators

For normal educational or personal use, this usually changes nothing in practice.

Who this helps

We built MathViewer especially for:

  • Students and teachers receiving MathML-based assignments
  • Researchers and editors checking formula rendering quickly
  • Developers of educational products validating incoming formula files

If installing a full office suite for one file feels excessive, that is exactly the scenario we made this tool for.

What is next: macOS and Linux in progress

Right now, we ship a Windows release.
We are actively developing macOS and Linux versions.

Current status:

  • macOS: in development
  • Linux: in development
  • Windows: available now (v0.1.6)

We built MathViewer to solve a small but real pain point with a focused approach.
For formula viewing, that focus is exactly its strength.