What you get for a .SIG file
We don't have a dedicated viewer for this format, so we identify and inspect it instead — honestly, only what can be read from the file.
Drop your .SIG file
Choose it or drag it in. It's read right here in your browser.
We identify it
We read the magic bytes to tell what the file really is, its MIME type, and whether the name matches the contents.
See the details
Any metadata we can extract (dimensions, EXIF/GPS, document author and dates), a hex view, plus readable text and strings found inside.
What is a .SIG file?
Plain text that programs, servers and people write every day.
A .SIG file is a signature file categorized as a text-based data format. It typically contains personalized signature information used for identification in communications. These files are commonly opened and managed by applications such as Microsoft OneNote, Microsoft Office, Office 365, and Eudora.
Programs that open .SIG files
| Full name | OpenPGP Detached Signature |
|---|---|
| Developer | PGP / GnuPG (OpenPGP standard, IETF) |
| First released | OpenPGP signatures: PGP 1991, standardized as RFC 2440 (1998) / RFC 4880 (2007) / RFC 9580 (2024) |
| Category | Text & Code |
| MIME type | application/pgp-signature |
Related viewers
Every viewer is free to use.
Frequently asked questions
Is my .SIG file uploaded anywhere?
No. The file is read and highlighted for you.
Why do some characters look wrong (é, ł)?
That usually means the file was saved in one encoding and opened in another. We detect UTF-8, UTF-16 and the Windows-1250/1252 code pages automatically and show which one was used.
Can it handle huge log files?
Yes, up to 50 MB. Only the lines on screen are drawn, so scrolling stays smooth. Syntax colours are switched off for files over 1.5 MB to keep things fast.
How do the log level filters work?
We find levels like ERROR, WARN, INFO and DEBUG on each line. Lines without a level, such as stack traces, stay with the entry above them, so filtering to errors keeps the full trace.
Can I edit the file?
This is a viewer. To change code, download it or copy it into your editor. Converting encodings and line endings is planned.
Was this tool helpful?
Your rating helps us decide which tools to improve next.