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About This Tool
The MIME Type Checker provides an instant lookup directory for standard IANA media types and file extensions. Enter any file extension (such as json, png, pdf, svg, or webp) into the search input. The client-side utility filters a local dictionary of common web and application file formats in real time.
The results list displays corresponding format extensions alongside standard Content-Type strings (e.g., application/json, image/png, application/pdf). This helps backend engineers, web developers, and cloud administrators configure correct HTTP headers, S3 upload Content-Type metadata, and web server MIME mappings. All searches execute in-memory inside your browser with zero remote database queries or network requests.
How to Use
- 1
Type a file extension into the search field (e.g., json, svg, webp, or mp4).
- 2
View filtered matching extensions and corresponding IANA Content-Type strings instantly.
- 3
Copy the official MIME type string directly into your HTTP response headers or web server config.
- 4
Clear the input to browse the complete list of supported format mappings.
Frequently Asked Questions
What is a MIME type?
A MIME (Multipurpose Internet Mail Extensions) type, also known as a media type, is a standard two-part identifier (e.g., text/html or application/json) sent in HTTP headers to inform browsers how to process file contents.
Can I search by extension with or without a leading dot?
Yes. The search input automatically strips leading dots, so entering ".json" or "json" yields identical matches.
Are my searched file extensions logged or uploaded?
No. The search filters a local client-side JavaScript dictionary entirely within your browser memory.