Where’s My Cert?

What certificate is inside your image — and can you trust it? Point Where’s My Cert at any Docker image, and it walks the layers, finds the certificate material, and answers the question in seconds.

Which certificate is inside the image?

Pull the image

Step 01 Pull the image

Fetch the target image from its registry and pin the digest, so every scan is reproducible — same layers, same result, every time.

Inspect the layers

Step 02 Inspect the layers

The search walks the layer tree for certificate material: .pem and .crt files, PKCS#12 stores, and the TLS certificates baked into the base image.

Expose the certificate

Step 03 Expose the certificate

You get the certificate, its issuer, and its expiry in one view — the answer to "where’s my cert" for any image in your registry.

Who searches for certificates

Security engineers

Scan every image that reaches production for the certificate it actually ships, not the one the Dockerfile claims.

Release engineers

Confirm the signing certificate in a published image matches what the release pipeline expects — before it ships.

Auditors and compliance

Close the evidence gap: which certificates your images carry, in a form reviews can actually use.

Why Where’s My Cert

01

Focused on the search

One question, answered: naming the certificate in your image and where it came from — no dashboards to learn, no accounts to create.

02

Built on evidence

The answer comes straight from the image’s own layers, so it reflects what the artifact actually carries — not a guess.

03

Ready for scale

Point it at one image or a whole registry; the answer is the same, every time.

Get in touch

Found a certificate you didn’t expect? Tell us which image you searched and what turned up. The form posts to an endpoint you set in src/routes/+page.svelte (FORM_ENDPOINT) — see README.md.