What's the difference between Personal and Studio?

Personal ($39) is for one person — unlimited use on one active device at a time. Activate on a new device and the old one signs out. Studio ($199) is for teams and commercial client work — unlimited team members, early access to new tools, and a commercial license.

Do I need an account?

No. Use any tool free up to 5 times per day on compute-heavier tools, and unlimited on lightweight ones. No card, no account, no signup required.

Where are my files processed?

Right on your device. Files never upload to any server. Everything runs in your browser — you can verify in DevTools → Network.

What happens if I use my Personal license on a second device?

The new device activates and the old device signs out. Your license key stays the same — you just move it between devices as needed. No limit on how often you switch.

Does this work on my phone?

Yes. Every tool works on iPhone, Android, tablet, and desktop.

What if I want a refund?

30-day money-back guarantee on both tiers. No questions asked. Email sales@cipherforces.com.

Will you add more tools?

Yes. New tools ship regularly. Your license includes every tool we ever release — Studio members get early access.

SecurityFreeBy Daniel BeglaryanUpdated August 2026

Decode SSL Certificates

Read every field of an X.509 certificate or CSR — subject, validity, SANs, key usage, and fingerprints.

PrivateWorks OfflineNo Account

Your certificate never leaves this device

Every field below is parsed locally in your browser. Nothing you paste is uploaded, stored, or logged — safe to inspect production certificates and private CSRs.

Paste a certificate or CSR (PEM)

Paste a single certificate, a whole chain (multiple blocks), or a CERTIFICATE REQUEST. Each block is decoded separately. Nothing is uploaded.

Deep dive

About Decode SSL Certificates.

Decode an SSL Certificate or CSR in Your Browser

Paste a PEM-encoded X.509 certificate or a PKCS#10 certificate signing request and this tool breaks it into every field that matters: subject and issuer, the validity window with a live "days remaining" countdown, serial number, signature algorithm, public-key type and size, Subject Alternative Names, key usages, basic constraints, key identifiers, and the SHA-1 and SHA-256 fingerprints. Paste a whole chain and each certificate is decoded into its own card.

Unlike the online certificate decoders that upload your PEM to a server, this one parses everything locally with the jsrsasign crypto library — nothing you paste ever leaves your device. That makes it safe for internal, staging, and production certificates, and for the private CSR you are about to hand to a certificate authority.

One honest limit: this is a decoder, not a validator. It reads the fields exactly as they are written in the certificate — it does not verify the signature, walk the trust chain, or check revocation. "Valid" here means the certificate's own not-before and not-after dates cover today, nothing more.

Common uses

Check an expiry date: Paste a live certificate to see exactly when it expires and how many days remain before you need to renew.
Confirm the SANs: Verify that every hostname and wildcard you asked for actually made it into the Subject Alternative Name list before you deploy.
Review a CSR before submitting: Read back the subject, key size, and SANs of a signing request so you never order the wrong certificate from your CA.
Inspect a chain: Paste the server and intermediate certificates together and read each one's issuer and subject to see how the chain links up.
Match a fingerprint: Copy the SHA-256 thumbprint to compare against what a browser, a pinning config, or a colleague reports.
Learn what's inside PKI: See how key usage, extended key usage, and basic constraints are actually encoded while you are studying certificates.

Privacy: This tool runs entirely in your browser. Your certificate, CSR, and the keys they reference are parsed on your own device and are never uploaded, stored, or logged.

Three steps