text/plain vs text/html — When to Use Which
Understand the difference between text/plain and text/html, when browsers render HTML, and when they display raw text.
Detailed Explanation
text/plain vs text/html
These two text MIME types serve fundamentally different purposes, even though both carry human-readable content.
text/plain
text/plain tells the browser to display the content exactly as-is, with no interpretation of HTML tags. Line breaks and whitespace are preserved, and nothing is rendered as markup.
Content-Type: text/plain; charset=utf-8
Use cases:
- Log file downloads
- README files without markup
- Plain text API error messages
- Code snippets served raw
text/html
text/html instructs the browser to parse and render the content as an HTML document. Tags like <h1>, <p>, and <a> are interpreted and displayed as styled elements.
Content-Type: text/html; charset=utf-8
Security Implications
Serving user-supplied content as text/html is dangerous because it enables Cross-Site Scripting (XSS). If you must display user input, either sanitize it thoroughly or serve it as text/plain. The X-Content-Type-Options: nosniff header prevents browsers from MIME-sniffing and treating text/plain as HTML.
Quick Comparison
| Feature | text/plain | text/html |
|---|---|---|
| HTML tags rendered | No | Yes |
| Whitespace preserved | Yes | Collapsed (unless <pre>) |
| XSS risk | Low | High |
| Typical use | Logs, raw text | Web pages, emails |
Use Case
Choose text/plain when serving log files, raw configuration outputs, or any content where HTML rendering is undesirable. Use text/html for web pages, HTML emails, and content that should be visually styled by the browser.
Try It — MIME Type Reference
Related Topics
application/json — The Standard JSON MIME Type
Common Types
Choosing the Right Content-Type for REST APIs
Application Types
text/css and text/javascript — Serving Web Assets Correctly
Best Practices
application/octet-stream — The Generic Binary Fallback
Common Types
multipart/form-data — File Uploads in HTTP
Multipart