How to read a .SPC file online
Three steps, a few seconds.
Open your .SPC file
Drop it on the box or click to choose it. A bundle holding several certificates is split for you automatically.
Unlock if needed
A password-protected file asks for its export password. It is used only to unlock the file.
Check the details
Read the chain from your certificate up to the root, see every domain it covers, when it expires and copy its SHA-256 fingerprints.
What is a .SPC file?
What's inside .crt, .pem and .p12 files, in plain words.
An SPC file is almost always a Super Nintendo (SNES) audio file, a 64 KB memory snapshot of the SNES sound processor that lets you play game music on a PC. Use foobar2000 with the foo_gep plugin or Chipamp to play it. If the file came from a code-signing tool rather than a game music site, it is a Software Publisher Certificate (PKCS#7), a different format.
Programs that open .SPC files
| Full name | SNES SPC700 Audio File |
|---|---|
| Developer | Community standard; originated from SNES game music preservation (Zones/Firebird, ~1997) |
| First released | ~1997 (SPC file format v0.30 specification) |
| Category | Data & Other |
| MIME type | audio/x-spc (de facto, not IANA-registered) |
| Signature | 53 4E 45 53 2D 53 50 43 37 30 30 20 53 6F 75 6E 64 20 46 69 6C 65 20 44 61 74 61 20 76 30 2E 33 30 ("SNES-SPC700 Sound File Data v0.30") |
Related viewers
Other free tools to open and preview your files.
Frequently asked questions
Is it safe to open my .SPC file here?
Yes. Certificates are public by design, and decoding and signature checks run with the Web Crypto API.
What does “chain verified” mean?
Each certificate is signed by the one above it. The viewer checks those signatures mathematically, so you can see whether your server certificate, intermediate and root actually belong together - the most common cause of “incomplete chain” errors.
My .p12 / .pfx asks for a password. Which one?
The password chosen when the file was exported (for example from Windows, a browser or your CA's portal). Some files have an empty password - try leaving the field blank.
Why don't you show my private key?
A private key is the secret half of the certificate. Anyone who sees it can impersonate you, so the viewer only tells you that a key is present and what type and size it is.
Can it check if a certificate is revoked?
Not yet. Revocation (OCSP/CRL) needs to contact the certificate authority, which we keep for the server-side version of this tool.
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