Web Standard: Standard Web Formats and Proprietary File Formats

Related Information

Definitions

The EPA standard formats for publishing information on the Web are HTML and PDF. Many programs create file formats with unique file extensions (e.g.; .doc, .pptx, .zip). Proprietary formats (e.g.;  .docx, .xls, .ppt, .exe) should be used only when necessary e.g., when providing forms or other documents that users may need to edit or files for installing software. These files are rarely updated and are more likely to become redundant, outdated or trivial. Consider carefully before publishing these types of files.

Add proprietary format disclaimer and link to the EPA formats page.

  • Option 1: Add a Multipurpose box to the page that contains: You may need additional software to view some of the links on this page. See EPA’s Free Viewers and Readers page.
  • Option 2: Inline disclaimer (e.g.): Document Title (DOCX) Free Viewers

Content Requirements

  • Scan files for viruses before loading.
  • When linking to other file formats, follow this format: <link>Document Title (DOCX)</link> 
  • You may only use file types for applications which EPA has a Terms of Service agreement. Terms of Service are negotiated at the Agency or federal level.

About this Standard

All EPA public web content must adhere to all federal requirements including; the EPA Web Standards, the U.S. Web Design System guidelines, federal plain language guidelines, and the 21st Century Integrated Digital Experience Act. Internal content, including Intranet and Microsoft 365, may differ from the public content. If not explicitly stated, content must adhere to all federal requirements.

Original effective date: 09/12/2012
Last approved on:12/8/2021
Web Council review by: 12/8/2024 (or earlier if deemed necessary by the Web Council)

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Last updated on November 27, 2023