nowfound

AI · December 31, 2025

VizuLLM

Hi HN I’ve been working on VizuLLM, an open-source engine that turns structured LLM outputs (JSON) into deterministic, printable documents like timetables, invoices, guides, and diagrams. LLMs are great at generating text, but in real applications we usually need documents, not paragraphs. VizuLLM introduces a strict contract between the model and the UI: • LLM generates schema-validated JSON • Schemas define a document type • VizuLLM renders a deterministic visual artifact (HTML / PDF) Instead of asking an LLM to “write a PDF”, you ask it to generate data for a document schema, and the…

VizuLLM launched on December 31, 2025 with 7 votes, #1,248 of 11,628 launches that month.

Visit vizullm.com ↗VizuLLM alternativestop 11% of December 2025

What it does

Transform your LLM outputs into beautiful, printable documents with just a few clicks. Type-safe schema driven renderers built with React, TypeScript, and Zod schemas.

Transform your LLM outputs into beautiful, printable visualizations with just a few clicks. Type-safe visual components built with React, TypeScript, and Zod schemas.

In the maker’s words, at launch

Hi HN I’ve been working on VizuLLM, an open-source engine that turns structured LLM outputs (JSON) into deterministic, printable documents like timetables, invoices, guides, and diagrams. LLMs are great at generating text, but in real applications we usually need documents, not paragraphs. VizuLLM introduces a strict…

Does a similar job

all alternatives →
  • OpenUIMar 2026 · openui.com · ▲322

    Thesys just open-sourced their generative UI rendering engine. Interesting timing given where Google a2ui and Vercel's json-render are headed. The difference worth noting: a2ui and json-render both treat JSONL as the contract between the LLM and the renderer. Thesys is betting that's the wrong primitive. Their engine uses a code-like syntax (OpenUI Lang) instead — LLM writes it, renderer executes it. The argument is that LLMs are fundamentally better at generating code than generating structured data, so you get cleaner output and ~67% fewer tokens. The broader vision seems to be a…

  • Programmatically Generate Diagrams for GitHub Readmes2019 · github.com · ▲220

    🧜‍♀️ RESTful rendering pipeline for generating sequence and UML diagrams using Mermaid for Markdown docs (Diagrams as a Service) - Schachte/Mermrender

  • Robust LLM extractor for websites in TypeScriptMar 2026 · github.com · ▲72

    We've been building data pipelines that scrape websites and extract structured data for a while now. If you've done this, you know the drill: you write CSS selectors, the site changes its layout, everything breaks at 2am, and you spend your morning rewriting parsers. LLMs seemed like the obvious fix — just throw the HTML at GPT and ask for JSON. Except in practice, it's more painful than that: - Raw HTML is full of nav bars, footers, and tracking junk that eats your token budget. A typical product page is 80% noise. - LLMs return malformed JSON more often than you'd expect, especially with…

  • Documind – Open-source AI tool to turn documents into structured data2024 · github.com · ▲169

    Documind is an open-source tool that turns documents into structured data using AI. What it does: - Extracts specific data from PDFs based on your custom schema - Returns clean, structured JSON that's ready to use - Works with just a PDF link + your schema definition Just run npm install documind to get started.

  • Structured output from LLMs without reprompting2023 · automorphic.ai · ▲174

    Built a tool for transforming unstructured data into structured outputs using language models (with 100% adherence). If you're facing problems getting GPT to adhere to a schema (JSON, XML, etc.) or regex, need to bulk process some unstructured data, or generate synthetic data, check it out. We run our own tuned model (you can self-host if you want), so, we're able to have incredibly fine grained control over text generation. Repository: https://github.com/automorphic-ai/trex Playground: https://automorphic.ai/playground

  • Building an LLM from Scratch in TypeScript10d ago · book.humanexperiences.io · ▲33

    The from-scratch guide to building large language models in NodeJS.

More ai this month

the category →
  • Video model that turns script into viral social media videos

    AI · 19d ago · spira.ai

  • The browser where Claude Code and Codex work beside you

    AI · 19d ago · rill.love

  • Kolibri is Aleph Alpha

    AI · 21d ago · tej.as

  • Paintings by AI models: programs run through a simulation of oil paint.

    AI · 22d ago · stillwet.art

  • Beam.win▲379

    Run AI agents on one Mac and use its windows on another

    AI · 6d ago · beam.win

  • Route requests to the right LLM for cost, latency & quality

    AI · 23d ago · fastrouter.ai

Source: Product Hunt launch ↗ · launch text quoted in part

Launched alongside, December 2025

the whole month →
  • GP

    Life & fun · Dec 2025 · dosaygo-studio.github.io

  • Hi everyone! My name's Luke and I made the original Jmail here alongside Riley Walz. We had a ton of friends collaborate on building out more of the app suite last night in lieue of DOJ's "Epstein files" release. Please AMA!

    Life & fun · Dec 2025 · jmail.world

  • Design and ship studio-grade landing pages with AI

    AI · Dec 2025 · loki.build

  • AI turns your health goals into a 7-day menu & grocery list

    AI · Dec 2025 · planeatai.com

  • Community, All the HN belong to you. This is an archive of hacker news that fits in your browser. When I made HN Made of Primes I realized I could probably do this offline sqlite/wasm thing with the whole GBs of archive. The whole dataset. So I tried it, and this is it. Have Hacker News on your device. Go to this repo (https://github.com/DOSAYGO-STUDIO/HackerBook): you can download it. Big Query -> ETL -> npx serve docs - that's it. 20 years of HN arguments and beauty, can be yours forever. So they'll never die. Ever. It's the unkillable static archive of HN and it's…

    Dev tools · Dec 2025 · hackerbook.dosaygo.com

  • AI video studio for viral social clips

    AI · Dec 2025 · cybercut.ai