What is a .HTM file?
HTM is a web page written in HTML - identical to .html, just using the three-letter extension that older Windows systems required.
- Did you know
- The .htm spelling is a relic of MS-DOS, which only allowed three-letter extensions, so early Windows web tools dropped the "l".
- The .htm spelling survives from the days when DOS and early Windows limited file extensions to three characters.
- Browsers treat .htm and .html identically, so the choice is purely cosmetic.
- What Analyser shows you
- Preview and inspect HTML, CSS, JavaScript, TypeScript, JSON, YAML, XML and Markdown source files, plus Windows scripts. TypeScript (TS, MTS, and .d.ts declaration files) gets a structure readout beside the source: the modules it imports (packages against local files, and which are type-only), the names it exports, what it declares - interfaces, type aliases, enums, classes, functions - a code/comment/blank line breakdown, and how often it steps around the type system with any, as casts, non-null assertions and @ts- suppressions. PowerShell (PS1, PSM1, PSD1) is read for its comment-based help synopsis, #Requires directives, function and parameter counts, CmdletBinding and Authenticode signing; batch/command scripts (BAT, CMD) for the echo state, labels, variables set and the external tools they invoke.
- Open a .HTM file
- Drag a .HTM 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.