# TLS Certificate Cheat Sheet - OpenSSL & Curl

DevFeed: [TLS Certificate Cheat Sheet - OpenSSL & Curl](<https://devfeed.tech/articles/tls-certificate-cheat-sheet-openssl-curl-31866.md>)

Original publisher: [Read original article](<https://www.metachris.dev/2025/09/tls-certificate-cheat-sheet-openssl-curl/>)

Author: Chris Hager

Published: 2025-09-22T00:00:00Z

Content type: tutorial

Language: en

Sources: [Chris Hager](<https://devfeed.tech/sources/chris-hager.md>)

Topics: [TLS (Transport Layer Security)](<https://devfeed.tech/topics/tls.md>), [certificates](<https://devfeed.tech/topics/certificates.md>), [Cheat sheet](<https://devfeed.tech/topics/cheatsheet.md>), [openssl](<https://devfeed.tech/topics/openssl.md>), [cURL](<https://devfeed.tech/topics/curl.md>)

Tags: [certificates](<https://devfeed.tech/tags/certificates.md>), [cheat-sheet](<https://devfeed.tech/tags/cheat-sheet.md>), [curl](<https://devfeed.tech/tags/curl.md>), [openssl](<https://devfeed.tech/tags/openssl.md>), [tls](<https://devfeed.tech/tags/tls.md>), [tools](<https://devfeed.tech/tags/tools.md>)

## AI overview

A cheat sheet for creating, inspecting, signing, validating, and testing TLS certificates and related keys and CSRs using OpenSSL and cURL.

## Source excerpt

https://collective.flashbots.net/t/tls-certificates-know-how-quick-reference/5292