Certificate format

CRT Sample Files

CRT (.crt) files represent certificate containers used by trust stores. Use sample CRT files to validate import logic, metadata parsing, and certificate-chain processing.

6 files All to 1MB SHA256 verified Manifest included
Quick facts
CategoryCertificate
Total Files6
Extension.crt
MIMEapplication/x-x509-ca-cert
ManifestJSON
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Files first

Start with one representative file.

Starter file

crt_intermediate_ca_sample.crt · 1.4 KB

Download

Leaf Server CRT

Leaf certificate fixture for TLS validation and cert metadata inspection.

crt_server_leaf_certificate_sample.crt · 1.5 KB
Download Fixture

Intermediate CA CRT

Intermediate certificate fixture for chain-building and trust validation.

crt_intermediate_ca_sample.crt · 1.4 KB
Download Fixture
Filename Size MIME Download
.crt Realistic Starter SHA256 c4e7249b2e09...
1.4 KB application/x-x509-ca-cert Download
.crt SHA256 4eada001ee60...
1.0 MB application/x-x509-ca-cert Download
.crt SHA256 f2e2a6503752...
200.0 KB application/x-x509-ca-cert Download
.crt SHA256 68d86a80affb...
500.0 KB application/x-x509-ca-cert Download
.crt SHA256 c3d6283c66d5...
50.0 KB application/x-x509-ca-cert Download
.crt Realistic SHA256 d6b3a40dc848...
1.5 KB application/x-x509-ca-cert Download
Use cases

Pick the next task, not just the next file.

Use the file table first, then branch into compare or FAQ only if the task needs more context.

Compare and decide

Keep the next decision one step away.

FAQ and reference

Keep the operational details quiet.

Checksum Verification

Use checksums to confirm file integrity after download.

shasum -a 256 your_file_name_here
# Compare output with SHA256 values listed above.
Where is the machine-readable manifest?

Use the manifest when you need stable names, SHA256 values, and URLs for automation.

Validation Methodology
  • Validate certificate chains, key handling, and parser behavior before any deployment use.
  • Test encrypted versus unencrypted private-key handling in your loaders.
  • Confirm trust-store import logic and CSR metadata inspection paths.