HTM vs HTML
Um comparativo detalhado de HTML Document (short) e HTML Document — tamanho de arquivo, qualidade, compatibilidade e qual escolher de acordo com seu fluxo de trabalho.
HTML Document (short)
Documents & TextHTM is an alternative extension for HTML files, functionally identical to .html. Common on older Windows systems.
Sobre os arquivos HTMHTML Document
Documents & TextHTML is the standard markup language for web pages. As a conversion target or source, it carries text content with structural and formatting information that can be extracted or repurposed.
Sobre os arquivos HTMLComparativo de vantagens
HTM Vantagens
- Identical content to .html in every respect.
- Universally supported by every browser and server.
- 8.3 compatibility for antique DOS/Windows shares.
HTML Vantagens
- Universal — every browser, OS, email client, and document reader displays HTML.
- Plain text, human-readable, grep-able, and diffable in git.
- Flexible — pages render even with broken or partial markup (error-tolerant parser).
- Carries structure, styling (CSS), and behavior (JavaScript) in one file.
- Accessibility-friendly when written with semantic tags and ARIA attributes.
Limitações
HTM Limitações
- No real reason to use .htm over .html in 2026.
- Inconsistent with modern naming conventions.
- Mixed extensions within one site confuse static-site generators.
HTML Limitações
- Error tolerance allows sloppy markup to hide real bugs.
- Rendering depends on browser engine — pixel-perfect cross-browser output is an art form.
- Security-sensitive — unsafe HTML can execute scripts or leak data (XSS vulnerabilities).
- File size for equivalent structured data is larger than JSON or XML due to tag verbosity.
- No built-in typing or schema — contract between server and client is informal.
Especificações técnicas
| Especificação | HTM | HTML |
|---|---|---|
| MIME type | text/html | text/html |
| Extension | .htm | — |
| Standard | HTML Living Standard (WHATWG) | HTML Living Standard (WHATWG) |
| Alias of | .html | — |
| Origin | DOS 8.3 filename limit | — |
| Extensions | — | .html, .htm |
| Character encoding | — | UTF-8 (recommended) |
| Element count | — | ~110 in current spec |
Tamanhos típicos de arquivo
HTM
- Legacy landing page 5-50 KB
HTML
- Hello-world page < 1 KB
- Blog post (rendered HTML) 5-40 KB
- Modern SPA (initial HTML shell) 50-200 KB
- Full archived web page (with inline assets) 500 KB - 10 MB
Pronto para converter?
Converta entre HTM e HTML online, grátis e sem instalar nada. Upload criptografado, exclusão automática em 60 minutos.
Perguntas frequentes
HTM (HTML Document (short)) is a document format used to store paginated text, with optional formatting, tables, images, hyperlinks, headers and footers. It sits in the documents & text family and is typically associated with a specific office suite or publishing pipeline that defined the format and ships the canonical reader.
HTM (HTML Document (short)) is a document formato used to store paginated text, com optional formatoting, tables, images, hyperlinks, headers e footers. It sits no documents & text family e is tipicamente associated com a specific office suite ou publishing pipeline that defined the formato e ships the canonical reader.
Modern office suites — Microsoft Word, Google Docs, LibreOffice Writer, Apple Pages — open most HTM files with reasonable fidelity. If your installed software does not support HTM, convert to DOCX or PDF first using KaijuConverter; both open in virtually every reader, including free online viewers.
Modern office suites — Microsoft Word, Google Docs, LibreOffice Writer, Apple Pages — abrir most HTM arquivos com reasonable fidelity. If your installed software does not support HTM, converter to DOCX ou PDF first usando KaijuConverter; both abrir in virtually every reader, including grátis online viewers.
Upload the HTM to KaijuConverter and pick DOCX, PDF, ODT, RTF, HTML, Markdown, or plain text. Our pipeline runs LibreOffice headlessly plus pandoc for text formats — the same engines behind professional document pipelines. Styles, tables, images, and hyperlinks survive the conversion intact.
Yes, to a high degree. Standard fonts, headings, lists, tables, images, hyperlinks and page structure transfer cleanly. Custom fonts substitute to the closest match if not embedded; obscure layout features unique to HTM (frames, legacy macros) may flatten to static content in the target format.