Good uses
- Check a renamed download.
- Compare first bytes, MIME type, and extension before opening or uploading.
Archives And File Inspection
Magic bytes explorer
Inspect file signatures to understand what a file really is. Files stay on your device.
Runs in your browser ยท Files stay on your device
Waiting
Runs in your browser. Files do not leave your device.
Input
Magic bytes explorer. Inspect file signatures locally.
Drop fileUp to 25MB. Local only.DropBrowsePaste
Tool notes
Before you share
Result What you get
Inspect file signatures to understand what a file really is.
Input
any
Output
signature-report
Steps Run order and common questions
- Choose or enter any in the workbench.
- Run the inspection tool locally in your browser.
- Review the signature-report result, then copy or download it if the workbench offers that action.
- Use related retained tools for validation, cleanup, conversion, or the next workflow step.
Use it well Examples, checks, limits, and recovery paths
Bad inputs
- Expecting malware detection.
- Using a byte signature as proof of authenticity.
- Relying on it for obscure proprietary formats.
Output checklist
- Check extension mismatch status.
- Route ZIP files to archive path review.
- Use checksums when comparing against a trusted published hash.
Failure modes
- Unknown types remain unknown.
- Container formats can share ZIP signatures.
- Very small or truncated files may only show weak signals.
Runtime limits
- Browser-local.
- Reads first-byte and metadata signals.
- No upload or malware verdict.