Website for creating self-signed certificates
If you're developing locally and need to use HTTPS for whatever, then this tool is hopefully useful to you. I made it because there's a lot of bad info online about generating self-signed certificates. For instance, a lot of guides don't use the SAN list extension or show you how to create a proper certificate chain. Firefox doesn't allow a CA certificate to be used as an end certificate. Getting a working certificate can get pretty confusing, especially for newcomers to certificates or webdev. Having a website for this also means the process of getting a certificate is the same, no matter…
What it does
In the maker’s words, at launch
If you're developing locally and need to use HTTPS for whatever, then this tool is hopefully useful to you. I made it because there's a lot of bad info online about generating self-signed certificates. For instance, a lot of guides don't use the SAN list extension or show you how to create a proper certificate chain. Firefox doesn't allow a CA certificate to be used as an end certificate. Getting a working certificate can get pretty confusing, especially for newcomers to certificates or webdev. Having a website for this also means the process of getting a certificate is the same, no matter if you're on a Unix-like OS or Windows. A WebAssembly module built with C++ and Mbed TLS is used to create the keys and certificates. TypeScript and Preact is used for the UI.
Does the same job
all alternatives →


- IMI made a script to generate self-signed SSL certs for local development2018 · github.com · ▲107
- SMSelfCertForge, manage root CAs and self-signed certs on macOS/WindowsMay 2026 · github.com · ▲5
Hi, HN! I recently published SelfCertForge, an open source desktop app for creating and managing self-signed certificates on macOS and Windows: https://github.com/rbonestell/SelfCertForge/ I know, I know... this isn't an earth-shattering invention. This came from a place of years of personal annoyance. I’ve been maintaining scripts that wrapped OpenSSL for local certificate workflows: create a long-lived root cert, add it to the trust store, then generate and sign child certificates for local services. The scripts work but the workflow was clunky. Used infrequently…
- GSGenerate self-signed certs in browser2014 · indutny.github.io · ▲13
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Launched alongside, March 2024
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Life & fun · 2024 · github.com
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