File information
Show name, size, MIME, date and signature.
Add files or an archive
Drop files here. They will not be uploaded.
Result
How does File information work?
Choose a file or a set of files. The app reads them directly in the browser, applies safety limits and performs the selected operation locally. The source file remains unchanged.
Security and limitations
Archives are checked for unsafe paths, extreme compression ratios and excessive entry counts. Archiwum does not execute extracted files and is not an antivirus scanner.
Privacy
File names and contents are not sent to our own server. Heavier formats use a local WebAssembly module that consumes the user device resources rather than DreamHost resources.
FAQ
Is the file uploaded?
No. The file is read by your browser on your device.
Can I cancel the operation?
Yes. The Cancel button stops the current task and releases resources.
Does the result modify the source file?
No. You download a new file or report.
Related tools
Detect file type
Detect a format from magic bytes and compare the extension.
📄Magic bytes
Display a safe beginning of the file in hex.
📄Check file extension
Compare the file name with the detected signature.
📄Compare files
Compare size, SHA-256 and the first difference.
📄Compare binary files
Read chunks and find differing regions.