Developer

MIME type checker

Upload any file to see its MIME type, file size, extension, and last modified date.

Drop any file here or click to browse

100% private. All processing happens locally in your browser — no files or data are ever sent to a server.

How to use MIME type checker

01 Paste or type your input into the text field provided
02 The output generates instantly as you type
03 Click Copy to send the result straight to your clipboard

Frequently asked questions

Common questions about MIME type checker.

Is MIME type checker free to use?

Yes, MIME type checker is completely free. No account, subscription, or payment is ever required — just open the page and start using it.

Does MIME type checker upload my data to a server?

No. MIME type checker runs entirely in your web browser using client-side JavaScript. Your files, text, and data never leave your device, making it 100% private.

Can I use MIME type checker on my phone or tablet?

Yes. MIME type checker is fully responsive and works on all modern smartphones, tablets, and desktop browsers without installing any app.

Does MIME type checker work without an internet connection?

Yes. Once the page has loaded, MIME type checker works fully offline — all processing is done locally in your browser.

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About MIME type checker

A MIME type (Multipurpose Internet Mail Extension) is a two-part identifier that specifies the format of a file — for example, 'image/png', 'application/pdf', or 'text/javascript'. Web servers send MIME types in HTTP headers so browsers know how to handle files; incorrect MIME types cause downloads, blank pages, or broken embeds. The MIME Type Checker uses the browser's File API to display the MIME type reported by the operating system for any uploaded file, alongside the file size, extension, and last modified timestamp. No file content is uploaded — all information is read locally.