Cert Tool

Extension Developer Tools73 users

Overview

A comprehensive tool for certificates: Key Pair Generation, CSR Generation, Public Key Derivation, and Inspection.

A powerful and elegant Chrome extension for handling X.509 certificates and cryptographic keys. **Features** 1. Key Pair Generation Generate cryptographic key pairs instantly using the Web Crypto API. - Algorithms: RSA (2048, 4096 bits), ECDSA (P-256, P-384, P-521), and Ed25519. - Standard Formats: Private keys are exported in PKCS#8 and public keys in SPKI. - Save As: Easily download keys with a standard OS save dialog. 2. CSR Generation Create Certificate Signing Requests (CSR) with a user-friendly form. - Customizable DN: Set Common Name, Organization, Country, and more. - SAN Support: Add multiple Subject Alternative Names (DNS, IP, Email, URI). - Flexible Signing: Sign the request using your own private key. 3. Public Key Derivation Extract the public key component from various sources. - Input Types: Supports Private Keys (PKCS#8/PKCS#1), Certificates, or CSRs. - Auto-Detection: Automatically identifies the input type and algorithm. 4. Certificate/CSR Inspector View detailed information about certificates and signing requests. - Comprehensive View: Shows Serial Number, Subject, Issuer, Validity, and Public Key details. - Extension Decoding: Human-readable decoding for SANs, Basic Constraints, Key Usage, and Extended Key Usage (EKU).

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Details

Version
1.0.1
Updated
January 6, 2026
Flag concern
Offered by
mkontani
Size
169KiB
Languages
English
Developer
Email
itoama@gmail.com
Non-trader
This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

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The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

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