TEX is a TeX or LaTeX typesetting source file. Created by Donald Knuth. Knuth created TeX in 1978, and it still typesets most of the world’s mathematics and physics papers. Since version 3, TeX’s version number has gained extra digits that creep towards π, signalling how stable it has become. Knuth designed the companion Metafont system alongside TeX to define the very shapes of its letters.

How do I open a .TeX file?

Drop a .TeX file onto Analyser at https://analyser.valjdakosta.com/ and it opens directly in your browser - no upload, no account and no software to install. Open lightweight document and markup formats as selectable page previews: Rich Text Format (RTF, control words stripped to readable prose), AbiWord (ABW), FictionBook e-books (FB2), Hangul HWPX, and MHTML web archives (the saved HTML rendered with scripts removed), plus markup and typesetting source - DITA, TEI, JATS journal XML, reStructuredText, AsciiDoc, Org-mode, Textile, TeX/LaTeX and BibTeX - shown with every page selectable and copyable. Also opens the small sidecar files unpacked from 3MF and OOXML bundles: OPC relationship XML (.rels) and MD5 checksum text (.md5).

Can I open a .TeX file online for free?

Yes. Analyser is a free online .TeX opener and viewer that runs entirely in your browser - your .TeX file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.TeX file - what it is and how to open it online

Analyse a .TeX file

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What is a .TeX file?

TEX is a TeX or LaTeX typesetting source file. Created by Donald Knuth.

Did you know: Knuth created TeX in 1978, and it still typesets most of the world’s mathematics and physics papers.
Since version 3, TeX’s version number has gained extra digits that creep towards π, signalling how stable it has become.
Knuth designed the companion Metafont system alongside TeX to define the very shapes of its letters.
What Analyser shows you: Open lightweight document and markup formats as selectable page previews: Rich Text Format (RTF, control words stripped to readable prose), AbiWord (ABW), FictionBook e-books (FB2), Hangul HWPX, and MHTML web archives (the saved HTML rendered with scripts removed), plus markup and typesetting source - DITA, TEI, JATS journal XML, reStructuredText, AsciiDoc, Org-mode, Textile, TeX/LaTeX and BibTeX - shown with every page selectable and copyable. Also opens the small sidecar files unpacked from 3MF and OOXML bundles: OPC relationship XML (.rels) and MD5 checksum text (.md5).
Open a .TeX file: Drag a .TeX file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
Related formats: .RTF · .ABW · .FB2 · .HWPX · .MHT · .MHTML · .DITA · .DITAMAP · .TEI · .JATS · .NXML · .RST · .ADOC · .AsciiDoc · .ORG · .Textile · .LaTeX · .BIB and more. See all supported file types.