MIME types

MIME types. Convert MIME types to file extensions and vice-versa. Quickly identify file formats and their corresponding Content-Type with our free online MIME types lookup tool.

This essential web developer utility allows you to instantly convert between standard file extensions and their official MIME (Multipurpose Internet Mail Extensions) types.

Whether you are configuring a web server, handling file uploads in an API, or setting up email attachments, our lookup tool ensures your server accurately communicates the nature of the data being transmitted.

If you are configuring a server and need to test how it responds, our HTTP Headers Parser and HTTP Status Codes guide are the perfect companion tools to verify your content delivery.

Simply search by file extension or MIME type to find the exact string you need. This premium Content-Type reference guide covers hundreds of standard and vendor-specific MIME types, ensuring your web development tasks are accurate and efficient.

Hardcoding incorrect MIME types can lead to browser rendering errors or security vulnerabilities during file downloads, but our searchable index simplifies the process, making file type identification accessible to everyone from front-end developers to system administrators.

For developers dealing with file conversions, our Base64 File Converter helps you safely encode these files once you have identified their correct type.

We provide a 100% free, fast, and comprehensive MIME type reference directly in your browser, eliminating the need to search through dense IANA registries.

How to use this online tool

MIME types is designed for fast browser workflows when you need to format, validate, convert, decode, encode, generate, or inspect data without opening a heavy desktop app. Start with the input field or visible options, review the result, then copy or download the output for the next step.

Private processing in your browser

MIME types keeps the normal processing step local in your browser. That is useful for code snippets, tokens, documents, configuration values, text samples, and other material that should not be sent to a remote service unless you explicitly choose to share it.

When this tool is useful

Use MIME types for repeatable developer tasks, technical documentation, QA checks, quick conversions, debugging, content cleanup, and internal team workflows. The page focuses on clear inputs, immediate feedback, and output that is easy to reuse in code, reports, tickets, emails, or notes.

Practical tips

Before copying the final result, check important details such as spacing, casing, filenames, encoding, token structure, line breaks, or output format. Small checks prevent mistakes when the result is reused in source code, API requests, documentation, spreadsheets, or shared files.