How to install openssl35-dev on Ubuntu

Development files for openssl35

Vendor: GetPageSpeed LLC https://github.com/openssl/openssl

Availability

Compare package tracks by distribution and architecture. Checkmarks show the architectures available in each repository channel.

Distro	Channel	Version
Ubuntu 26.04 (resolute)	Base	3.5.8
Ubuntu 24.04 (noble)	Base	3.5.8
Ubuntu 22.04 (jammy)	Base	3.5.8
Ubuntu 20.04 (focal)	Base	3.5.8

Description

An ABI-isolated build of the OpenSSL 3.5 LTS line carrying the Encrypted Client Hello (ECH, RFC 9849) backport from the DEfO project. This package provides the C headers (under /usr/include/openssl35/openssl/), the development .so symlinks, and pkg-config files (libcrypto+openssl35.pc, libssl+openssl35.pc, openssl+openssl35.pc) for building applications against openssl35.

Built for Ubuntu.

Install

Base Ubuntu 20.04, 22.04, 24.04, 26.04

openssl35-dev on Ubuntu 20.04 (focal), 22.04 (jammy), 24.04 (noble), 26.04 (resolute)

curl -fsSL https://extras.getpagespeed.com/release-latest.deb -o /tmp/getpagespeed-release.deb
sudo apt-get install -y /tmp/getpagespeed-release.deb
rm /tmp/getpagespeed-release.deb
sudo apt-get update
sudo apt-get install -y openssl35-dev

Frequently asked questions

How do I install openssl35-dev on Ubuntu?

Add the GetPageSpeed repository, then install the openssl35-dev package with your system package manager.

Which Ubuntu versions is openssl35-dev available for?

openssl35-dev is available for Ubuntu 20.04, 22.04, 24.04, 26.04.