Show HN: Kleks – declarative documents with live preview (in Rust+WASM)
kleks.io
I’ve been working on Kleks, a developer-oriented tool for generating documents like invoices, reports, contracts etc. using a declarative, code-based approach.
What it is Kleks is a local-first app written in Rust and compiled to WebAssembly, running entirely in your browser. It combines:
A template-based system with a configuration language called Kel
Modular widgets, similar to how UI frameworks like Flutter work
Live preview that updates as you type
A focus on developer experience from document authoring to serving
Think of it like a toolkit for documents.
Try it out https://www.kleks.io (on desktop, mobile experience is not great)
No signup needed. It runs locally in your browser.
Tech Rust + WebAssembly
Custom configuration language (Kel)
Inspired by Flutter’s widget system
Documents built from reusable components
What’s next Dynamic document serving via REST/gRPC
New widgets (images, layout transforms)
Language server for Kel
More docs and examples
Feedback? I’d love to hear what you think—especially about the language design, DX, and real-world use cases you’d like to see. You can also reach me at kleksdev@gmail.com.