File Size & Details Inspector

Analyze any file to view exact byte counts, MIME types, cryptographic hashes, and binary hex headers instantly.

How to Use File Details

  1. Drag and drop any file into the inspector workspace.
  2. Review file metadata including exact byte size, formatted size, and MIME type.
  3. Inspect the 64-byte hex and ASCII dump, or copy the cryptographic SHA-256 hash.

Technical Specifications & How It Works

Inspecting file magic bytes and checksums verifies file integrity, detects corrupted downloads, and identifies true file formats.

100% Client-Side Privacy: Files are read entirely in browser memory. No data is ever transmitted across the internet.

Frequently Asked Questions

How is the SHA-256 hash calculated?

The checksum is calculated locally using the browser hardware-accelerated Web Crypto API.

Can I inspect large files?

Yes. The tool processes files of any size directly from your local disk without uploading.

What does the hex dump show?

The hex dump displays the first 64 bytes of the file alongside their ASCII representations, revealing magic file headers.

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