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Mkcert: Simple zero-config tool to make locally trusted development certificates

github.com Software & code Software projects Security & privacy Candidate
Screenshot of github.com captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 4 calendar years, with breakout response in 2 of them.

submissions
9
submitters
8
observed span
2018–2024
peak thread · 42 comments
267 pts
latest 20+ return · 2022-10-29
267 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

_o/ author here! mkcert is definitely my most popular tool, and it's always a delight to see how it makes developers' lives easier and how happy they are about it <3 Something that I wonder about from time to time is how "done" is mkcert. A lot of its value is in simplicity, so I've rejected attempts to make it more of a toolkit to generate all sorts of certificates (although I see the value in being able to edit…

(All the below assumes I can read 'Go') Nit picks about these certificates: The certificates have a lifetime of 10 years starting from the exact moment they're created. I suspect ten years is overkill, but I don't see much real harm in it. However it's common practice to set the notBefore into the recent past, this is because a variety of problems may cause clock drift. This is your development environment, so you _could_ fix any drift, but this sort…

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
509

reference only — not used in Hall rules or ranking

Total comments
80

reference only — not used in Hall rules or ranking

Every submission