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Pick any file and find out what it really is: file format detected by its signature (magic bytes), HEX preview, checksums, text encoding, image and archive details – and a link to the matching file extension in our database with software that opens it.
Drag & drop a file here
or
The file never leaves your computer – everything is detected locally in your browser.
Matching signature against our database…
This result is not 100% conclusive. Many file formats share the same or very similar file headers, so files with different extensions can produce the same signature even though their internal structure differs. In such cases, the file extension is an important clue for identifying the correct format. For a deeper and more accurate analysis, upload the file to our server using the button below.
No known file signature matched the beginning of this file. It may be a plain text file or a format that has no fixed signature.
Format details and software that opens it →
The matched signature is very short, so the detection may not be reliable.
Sends only the first 32 KB (the file header) to our server for precise detection via libmagic — the file itself is not uploaded.
| File name | |
|---|---|
| Size | |
| Last modified | |
| File extension | no extension |
| MIME type (reported by browser) | |
| Format by signature | unknown |
| Type | Binary file (not plain text) |
First bytes of the file – the file signature (magic bytes) usually lives here.
End of file reached.
| Text encoding | |
|---|---|
| Line endings | |
| Lines | |
| Characters |
| Image dimensions | |
|---|---|
| Camera | |
| Taken at | |
| Exposure time | |
| Aperture | |
| ISO | |
| Focal length | |
| Created with | |
| GPS coordinates |
No EXIF metadata found.
| Type | |
|---|---|
| Files in archive | |
| Uncompressed size | |
| Compression ratio |
| 🔒 |
—
Computing checksums…
Computed locally from the file content. SHA-256 can be used to verify file integrity or to search malware databases.
Optionally upload the file to our server for a deeper analysis: exact MIME type, metadata, archive inspection, entropy and a malware scan. Maximum size: 100 MB.
The file is scanned for malware, analyzed and then immediately deleted from our server. Only the analysis results are stored (never the file content). The file name is removed from our records after 30 days.
Uploading…
Check whether two files - even with different names - contain exactly the same data. Verify that a download matches a trusted copy, compare versions, or spot a renamed or potentially tampered file using size, type, and SHA-256. Everything runs locally in your browser; nothing is uploaded.
| Size | ||
|---|---|---|
| File extension | ||
| SHA-256 |
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