🔍 File MIME-Type & Header Inspector
Inspect file MIME types, extensions, magic numbers, and binary headers by dropping files locally in your browser. 100% free and secure.
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Select or Drag & Drop File to Inspect Headers
Inspect true MIME-type, size, extension, and magic number bytes locally.
❓ Frequently Asked Questions
How does the file MIME-type inspector work?
It reads the first few bytes (magic numbers / file signatures) of your dropped file locally in the browser to identify its true MIME-type and format.
Are my uploaded files sent to any external server?
No. All file parsing, binary header reading, and MIME-type detection occur 100% locally inside your web browser.
What file formats can be inspected?
You can inspect any file type, including images (PNG, JPEG, GIF, WEBP), documents (PDF, ZIP), audio, and video formats.
