X.509 certificate generator
Mint test self-signed certificates with custom SANs and validity.
Also known as: Self-signed cert generator.
100% offline · macOS, Windows & Linux · free for personal use
Screenshot coming soon
// overview
What it does
X.509 certificate generator is one of 55 tools in Hexkit, a desktop developer toolbox that runs entirely on your own machine. Mint test self-signed certificates with custom SANs and validity.
Because Hexkit is a native app rather than a web page, anything you paste into the x.509 certificate generator stays local — there are no uploads, no accounts and no telemetry. You can generate IDs, hashes and test data even with the network turned off, which makes it safe for tokens, keys and production data.
// steps
How to use X.509 certificate generator
- 1
Open Hexkit and select "X.509 certificate generator", or press the command-palette key and start typing its name.
- 2
Pick your options. Mint test self-signed certificates with custom SANs and validity.
- 3
Read or copy the result. Everything is computed locally by Hexkit's Rust core, so nothing is ever uploaded.
Tip: the command palette opens any tool in one keystroke.
// faq
Frequently asked questions
- Is X.509 certificate generator free?
- Yes. X.509 certificate generator is part of Hexkit, which is free for personal and non-commercial use on macOS, Windows and Linux.
- Does X.509 certificate generator work offline?
- Completely. Hexkit runs every tool locally with no network access, so X.509 certificate generator works on a plane or an air-gapped machine.
- Is my data uploaded anywhere?
- No. Hexkit makes no network calls and has no telemetry — whatever you paste stays on your computer.
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Related tools
Use X.509 certificate generator without sending your data anywhere.
X.509 certificate generator ships inside Hexkit — a free, offline developer toolbox for macOS, Windows and Linux. No account, no uploads.