Unknown File Identifier
Free Unknown File Identifier on AboveTool. Inspect files, hashes, magic bytes, and encodings in your browser — private, no upload.
Unknown File Identifier
inspects files in your browser for unknown file identifier tasks without uploading anything
Drop files here or click to browse
Processed entirely in your browser
Private by design — files and text stay on this device. Results are indicative helpers, not forensic certification.
About Unknown File Identifier
Unknown File Identifier is inspects files in your browser for unknown file identifier tasks without uploading anything. It works by calculating reads local File/ArrayBuffer data, applies byte and text analysis, then shows results on-page. Keep sample files small when possible — huge binaries are slower to scan fully in the browser. Unknown File Identifier runs free in your browser at abovetool.com — no signup, instant results.
How to use
- Upload a file or paste text, depending on the tool.
- Tune options such as byte limit, hash algorithm, or encoding.
- Click Analyze to inspect bytes, hashes, MIME clues, or text — all locally.
Features
- Magic-byte, hash, hex, entropy, and string analysis
- Multi-file compare and extension/magic validation
- Text encoding, MIME lookup, and line-ending tools
- 100% private — files never leave your browser
Frequently asked questions
What is Unknown File Identifier for?
Unknown File Identifier is inspects files in your browser for unknown file identifier tasks without uploading anything.
How does Unknown File Identifier calculate the result?
It calculates reads local File/ArrayBuffer data, applies byte and text analysis, then shows results on-page.
Any tips for using this calculator?
Keep sample files small when possible — huge binaries are slower to scan fully in the browser.
Is Unknown File Identifier free on AboveTool?
Yes. Unknown File Identifier is free to use on abovetool.com with no account required, and results are calculated instantly in your browser.