Is the SSL Certificate Parser free?

Yes, it's completely free. No registration, no login. All parsing happens locally in your browser.

Is my certificate data uploaded to a server?

No. This tool uses client-side parsing — your certificate content never leaves your browser. You can disconnect from the internet and the tool still works.

What certificate formats are supported?

PEM format X.509 certificates (starting with -----BEGIN CERTIFICATE-----). Also supports Base64-encoded DER certificates. PKCS#12 (.pfx/.p12) and JKS formats are NOT supported — convert them to PEM with openssl first.

Can it detect expired certificates?

Yes. The tool parses the certificate's validity period (Not Before and Not After) and compares with current time. It automatically flags expired, not-yet-valid, and soon-to-expire (within 30 days) certificates with visual warnings.

Free Online SSL Certificate Parser

📌 This tool has been merged into ssl certificate decoder. Please use the new version.

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Updated: 2026-07-12

📜 Paste PEM Certificate

❓ Frequently Asked Questions

Do I need to install any software?

No. SSL Certificate Parser is a web-based tool — just open it in your browser and start using it. No downloads, plugins, or extensions required.

Can I use SSL Certificate Parser on my phone?

Yes. SSL Certificate Parser is fully responsive and works on phones, tablets, and desktops. The interface adapts automatically to your screen size.

Is SSL Certificate Parser free to use?

Yes, SSL Certificate Parser is completely free to use. No registration or login required — all features are available immediately.

Does SSL Certificate Parser upload my data to a server?

No. SSL Certificate Parser uses client-side processing — everything runs in your browser. Your data never leaves your device, and the tool works even without an internet connection.

Are there any usage limits for SSL Certificate Parser?

SSL Certificate Parser has no usage limits — it's free and unlimited. Since processing is done client-side, speed depends on your device. For very large files, we recommend processing in batches for the best experience.

Is my data safe when using SSL Certificate Parser?

Absolutely. Everything runs locally: SSL Certificate Parser and other values are processed on your device, never sent to a server. No data is sent to any server, so there's zero risk of data leaks. Your information stays completely under your control.

🔒 SSL Certificate Parser