Search and lookup MIME types by file extension or vice versa.
| Extension | MIME Type |
|---|---|
.css | text/css |
.csv | text/csv |
.html | text/html |
.jpg | image/jpeg |
.js | text/javascript |
.json | application/json |
.mp3 | audio/mpeg |
.mp4 | video/mp4 |
.pdf | application/pdf |
.png | image/png |
.svg | image/svg+xml |
.webp | image/webp |
.xml | application/xml |
.zip | application/zip |
When a web browser requests a file from a server, it doesn't look at the file extension (like .jpg or .json) to decide how to process it. Instead, it relies on the Content-Type HTTP header, which is defined by a standardized MIME (Multipurpose Internet Mail Extensions) type. If a server is misconfigured and sends the wrong MIME type, the browser might try to download a webpage instead of rendering it, or display a broken image icon. Our MIME Type Lookup is an essential reference utility for developers configuring servers or writing API responses.
This tool is designed for sheer speed. Instead of scrolling through massive Wikipedia tables or IANA documentation, you simply start typing into the search bar. If you know the file extension (e.g., 'csv'), type it in to instantly reveal the correct MIME type (text/csv). Alternatively, if you are looking at a raw HTTP response header and want to know what kind of file it represents, you can reverse-search the MIME string. If you are actively configuring a web server, you might also find our YAML to JSON Converter helpful for managing config files.
Accuracy is critical when dealing with web standards. Our database includes both standard historical types and modern formats (like WebP, AVIF, and WASM) to ensure you always have the correct string. Because the entire dataset is bundled directly into the application, your searches execute in milliseconds without any network latency. For developers dealing with file uploads and encoding, pair this tool with our Base64 Encoder.
Whether you are setting up an Nginx server, writing a Node.js file uploader, or debugging a tricky API response in Postman, this free, ad-unobtrusive lookup tool is the perfect quick-reference guide.
Determine the exact Content-Type header needed when returning dynamically generated files (like PDFs or CSVs) from an API endpoint.
Update Nginx or Apache server configuration files to ensure the server correctly identifies and serves modern file formats like WebP or WASM.
Build robust file upload validation logic that checks the incoming MIME type against an allowed whitelist to prevent malicious script uploads.