Ad blocking, built in
Filter lists run in the main process, not as an extension. Nothing to find, install, and entrust to a stranger.
Aszendra
A browser that remembers nothing you didn't hand it. Ad blocking, a password vault and sleeping tabs are built in — not bolted on.
Version 1.10.1 · macOS, Windows and Linux · English and German · What's new?
Passwords in a program of their own
The vault is a separate Rust program, not a module inside the browser. Argon2id and XChaCha20-Poly1305 — and no npm package shares memory with your passwords. One click checks whether any of them turned up in a data breach.
Tabs that go to sleep
After twenty idle minutes a background tab gives its memory back and keeps its history. Forty tabs start as fast as one.
The Constellation
Every open tab as a star map. What belongs together forms a named constellation, and every website has its fixed place in the sky.
Nachlese
Searches the text of the pages you've read, not just their titles. Off until you switch it on, and it never leaves your machine.
Cookies your way
View and delete them per site, or wipe everything on quit, except on the sites where you want to stay signed in.
Warns you about scam sites
Known phishing and malware sites are on lists Aszendra downloads twice a day. The check runs on your computer — no address is sent to Google or anyone else for it.
In your colour
Violet, Dark Cherry in wine red, or an accent of your own. Aszendra derives every shade from one colour, so everything stays readable.
Measured, not claimed
Aszendra runs on Chromium, the engine behind Chrome and Edge. The difference is what it leaves out: loading tabs you are not looking at.
Speedometer 3.1
Responsiveness of web apps · higher is better
- Aszendra30.2
- Chrome31.0
- Edge29.9
On par with Chrome and Edge: Aszendra is built on the same engine.
Restoring 30 tabs
Memory after start · lower is better
- Aszendra235 MB
- Chrome842 MB
- Edge836 MB
3.6 times less memory than the most frugal of the others. Aszendra only loads the tab you are looking at; the others wake up when you click them.
Measured on 24 September 2026 on Apple M4, 16 GB, macOS 26.3.1, each browser with a fresh profile: Aszendra 1.3.0, Chrome 154.0.8037.58, Edge 153.0.4234.48. Speedometer: mean of 10 iterations. Memory: all of the browser's processes together, shared memory counted once (macOS footprint), 90 seconds after starting with 30 tabs from the last session (Wikipedia, YouTube, Spiegel, BBC, GitHub and others), default settings.
Forty tabs, and you still know where you are
Ctrl+Tab opens a star map of every open tab. An article
and everything you opened from it form a constellation, and
lines connect the tabs that opened one another. Where
a tab came from is visible instead of remembered.
Brighter stars were used more recently, hollow rings are sleeping tabs. On the right is a preview of the selected star. Typing dims what doesn't match, and nothing disappears, not even with a hundred tabs.
Every website has its fixed place in the sky. The map doesn't turn around the tab you're on, which is why after a few days you know where things are.
No accounts, no telemetry
Aszendra has no sign-in area, no sync and no identifier that would let an installation be recognised again. On its own, the browser fetches only two things: every four hours, the answer to whether a newer version exists — asked with the version number, platform and channel, nothing else — and, regularly, the lists for the ad blocker and the protection against scam sites. The matching happens on your computer: the sites you visit never leave it.
DuckDuckGo is the preset search engine, followed by Startpage, Brave Search, Ecosia and Qwant. Google and Bing are in the list too, further down, and that is not a ranking but a stance: the ones that don't take notes come first.
Aszendra is free and will stay free. If you'd like to support the work on it: Support Aszendra →