MIME Type Checker – Detect File Content-Type Instantly
MIME Type Checker Tool
MIME Type Checker is a free, browser-based tool designed for IT professionals, sysadmins, and developers to instantly detect the MIME type (also known as content-type) of uploaded files. Just drag and drop your file or browse to select one — all detection happens in your browser with no uploads.
What Are MIME Types?
MIME types help browsers and APIs know how to handle different file formats. Misconfigured types can result in incorrect rendering, blocked downloads, or failed API calls. Identify them accurately with our tool.
Key Features
- Drag-and-drop or manual file selection
- Instant MIME type readout using JavaScript
- Fully client-side, no data leaves your browser
- Lightweight and fast, with optional dark mode
Use Cases
- Diagnose server misconfigurations of
Content-Typeheaders - Check CORS issues related to MIME type mismatch
- Security checks for allowed/blocked file type delivery
Learn more about MIME types on MDN and consult the official IANA registry.