Show HN: Vaev – A browser engine built from scratch (It renders google.com)

86 monax 35 5/18/2025, 5:54:12 PM github.com ↗
We’ve been working on Vaev, a minimal web browser engine built from scratch. It supports HTML/XHTML, the CSS cascade, @page rules for pagination, and print-to-PDF rendering. It even handles calc(), var(), and percentage units—and yes, it renders Google.com (mostly).

This is an experimental project focused on learning and exploration. Networking is basic (http:// and file:// only), and grid layouts aren’t supported yet, but we’re making progress fast.

We’d love your thoughts and feedback.

Comments (35)

khimaros · 2h ago
i find myself requesting this whenever i see a new minimalist browser pop up:

it would be great to standardize alternative browsers on a consistent subset of web standards and document them so that "smolweb" enthusiasts can target that when building their websites and alternative browsers makers can target something useful without boiling the ocean

i personally prefer this approach to brand new protocols like Gemini, because it retains backward compatibility with popular browsers while offering an off ramp.

idle_zealot · 2m ago
> standardize alternative browsers on a consistent subset of web standards and document them so that "smolweb" enthusiasts can target that

Could such a standard be based on the subset of HTML/CSS acceptable in emails? Maybe with a few extra things for interactivity.

userbinator · 1h ago
The subset could just be an older version of the spec, e.g. HTML 4.01 and CSS 2.1.

(My opinion as another one who has been slowly working on my own browser engine.)

robocat · 45s ago
[delayed]
poisonborz · 45m ago
That's easy to specify but contains a lot of bloat and unused features. A slimmer but more modern set would be useful.
ghayes · 48m ago
I feel like some of the newer standards like CSS Grid instead of tables might be the best way to go. Many HTML/CSS improvements were not just bloat but actually better standards to build on.
edoceo · 11m ago
Right! Crazy fonts or cursors, not on smolweb (as another use put it) but Flex and Grid are almost necessary. There are loads of things that could be dropped (it feels like).

I just want one of these browsers to give me a proper ComboBox (text, search and drop-down thing)

5- · 20m ago
> slowly working on my own browser engine

care to tell us more?

graypegg · 1h ago
I think that would be really neat for small scale web publishing, but making it a subset of browser standards could be a really difficult sell to the people making browsers. While it's easier to build a browser to a subset of such a massive set of specs, the subset will drift towards a "similar but slightly incompatible standard" pretty soon after it's decided on. Following the development of Ladybird has given me an appreciation for just how often the "spec" for the web changes. (in small ways, daily.) That locks new browser implementations into a diverging standards track that would be very difficult to get off of.

I think something like a reference implementation (Ladybird, Servo or even Vaev maybe?) getting picked up as the small-web living standard feels like the best bet for me since that still lets browser projects get the big-time funding for making the big-web work in their browser too. "It's got to look good in Ladybird/Vaev/etc".

An idea: a web authoring tool built around libweb from Ladybird! (Or any other new web implementation that's easily embeddable) The implied standard-ness of whatever goes in that slot would just come for free. (Given enough people are using it!)

shiomiru · 20m ago
> I think something like a reference implementation (Ladybird, Servo or even Vaev maybe?) getting picked up as the small-web living standard feels like the best bet for me since that still lets browser projects get the big-time funding for making the big-web work in their browser too.

A "standard" should mean there is a clear goal to work towards to for authors and browser vendors. For example, if a browser implements CSS 2.1 (the last sanely defined CSS version), its vendor can say "we support CSS 2.1", authors who care enough can check their CSS using a validator, and users can report if a CSS 2.1 feature is implemented incorrectly.

With a living standard (e.g. HTML5), all you get is a closed circle of implementations which must add a feature before it is specified. Restricting the number of implementations to one and omitting the descriptive prose sounds even worse than the status quo.

userbinator · 1h ago
small-web living standard

The phrase "living standard" is an oxymoron, invented by the incumbents who want to pretend they're supporting standards while weaponising constant change to keep themselves incumbent.

enos_feedler · 54m ago
You mean AMP without the BS
abhisek · 4h ago
What’s the long term goal of this project beyond learning? Building a browser to support the modern web is a humongous work IMHO.
monax · 3h ago
The main goal is great support for static documents rendering as it's being used at the core of the paper-muncher [1] PDF rendering engine, meant to replace wkhtmltopdf at odoo. But we don't exclude general web browsing and JavaScript support at some point.

[1] https://github.com/odoo/paper-muncher

dmkolobov · 3h ago
Ooh blast from the past!

At a previous company we moved off of wkhtmltopdf to a nodejs service which received static html and rendered it to pdf using phantomjs. These days you probably use puppeteer.

The trick was keeping the page context open to avoid chrome startup costs and recreating `page`. The node service would initialize a page object once with a script inside which would communicate with the server via a named Linux pipe. Then, for each request:

1. node service sends the static html to the page over the pipe

2. the page script receives the html from the pipe, inserts it into the DOM, and sends an “ack” back over the pipe

3. the node service receives the “ack” and calls the pdf rendering method on the page.

I don’t remember why we chose the pipe method: I’m sure there’s a better way to pass data to headless contexts these days.

The whole thing was super fast(~20ms) compared to WK, which took at least 30 seconds for us, and would more often than not just time out.

sshine · 1h ago
Sounds like fun considering how real the problem is.
Teever · 8m ago
So cool to see Odoo mentioned on HN. I've worked with it before and like it a lot.

I've made posts about it on HN before but they've never gained traction. I hope that this takes off.

You guys make neat software.

pierrelf · 3h ago
Looks like skift is a hobby os like Serenity OS which Ladybird is spun out from. Maybe they intend to follow the same path?
monax · 3h ago
I intend to keep Skift and Vaev together for as long as possible since everything is meant to be cross-platform. I don’t see any architectural conflict that would motivate such a change.
quibono · 42m ago
Are you open to contributions? I would love if there was a non-chromium alternative to wkhtmltopdf!
5- · 23m ago
edoceo · 9s ago
Yea, Prince is awesome. Not FOSS tho. I make some GPL or MIT licensed software and wish there was something as good a Prince with more open license.
busymom0 · 3h ago
I wish one of these projects would make a browser which only renders text (so texts and links) and no additional support for media (images, videos, audio etc).

I know there is Lynx but having a non-terminal based browser which could do it would be cool.

Telemakhos · 1h ago
You might be interested in Richard Stallman's method of browsing the web:

> I generally do not connect to web sites from my own machine, aside from a few sites I have some special relationship with. I usually fetch web pages from other sites by sending mail to a program (see https://git.savannah.gnu.org/git/womb/hacks.git) that fetches them, much like wget, and then mails them back to me. Then I look at them using a web browser, unless it is easy to see the text in the HTML page directly. I usually try lynx first, then a graphical browser if the page needs it. [0]

I know you wanted something other than lynx, but you could do this with EWW (Emacs web browser or any graphical browser, provided that your proxy wget dropped the images.

[0] https://www.stallman.org/stallman-computing.html

tos1 · 3h ago
Something like Dillo? (You can disable image rendering in Dillo).
Hashex129542 · 31m ago
Cool idea!
monax · 3h ago
For distraction-free reading?
dymk · 3h ago
Something like Reader View in safari / firefox?
revskill · 2h ago
Then google will use text to show ads.
busymom0 · 2h ago
Text based ads would be less distracting.
II2II · 1h ago
Remembering when Google only served text based ads.