Show HN: Built a visual UI editor that exports to code https://bit.ly/42lKjsg

Show HN: Built a visual UI editor that exports to code I've been specializing in UI for over a decade. Using code for UI is great but I always wished there was a more visual code to build apps and sites. So I went ahead and built it. Decided to build it with Compose Multiplatform since I work a lot with Kotlin. Currently exports to CMP as it was simpler due to the context switch. You can try it for free and export some apps https://bit.ly/3DSaOgQ April 4, 2025 at 11:04AM

Show HN: Transputer emulator in JavaScript (fast enough to be useful) https://bit.ly/42lSDIB

Show HN: Transputer emulator in JavaScript (fast enough to be useful) https://bit.ly/3RxsqBB April 4, 2025 at 04:59AM

Show HN: A new VSCode extension that shows definition functions in a stack https://bit.ly/4lgIRzY

Show HN: A new VSCode extension that shows definition functions in a stack Definition Stack is a new vscode extension I have just released. It is a reading tool for Javascript and Typescript. It is available in the extension marketplace. You just click in a function in any source code, execute a command, and a new tab opens next to the original. That tab has a "block" which contains a copy of the function you clicked in. In that code every word (symbol) that has a definition is highlighted. If you click on a higlighted word a new block opens above the original which contains the source code of the definition for that word. You can click in that block and repeat to create a stack. All function blocks are in the one tab that you can scroll through. There are other options like collapsing a block, deleting it, etc. It is easy to open a block, look at it, and delete it taking you back to the block below. Then clicking in the lower block with another word opens yet another block above. Continuining this process lets you walk the "tree" of references and definitions. This lets you see all the code executed when the original function runs. This is similar to stepping through code with a debugger. The function code is isolated in each block with the name of the original source code file and the lines are numbered the same. But when using the stack you can ignore what file each one came from. This gives a fresh way to look at what all the functions do without the cognitive load of remembering what file the functions are in. AFAIK, this concept is original. Correct me if I'm wrong. My idea came from an IDE for Java from IBM many years ago. In that system there were no source files at all. Each function came from from a database. That IDE was a failure :-) I think my version of that concept will do better because it doesn't replace source files, it just adds a tool for working with source files. The stack is created instantly and is just meant to be used occasionally when it makes sense. It is sort of a Go To Definition on steroids. Please give me feedback. Since it is brand new I want to fix anything wrong including user experience problems. Enjoy ... https://bit.ly/41VK8Vx April 3, 2025 at 11:59PM

Show HN: FlashTokenizer – 10x faster C++ tokenizer for Python https://bit.ly/3Rvb2NM

Show HN: FlashTokenizer – 10x faster C++ tokenizer for Python I built a tokenizer in C++ with a Python binding that outperforms HuggingFace tokenizers by 10x on large inputs. It's optimized for minimal memory usage and latency. Benchmarks and comparison included in README. Would love feedback or contributions! https://bit.ly/4cehmCW April 3, 2025 at 07:46AM

Show HN: OCR pipeline for ML training (tables, diagrams, math, multilingual) https://bit.ly/42dslrT

Show HN: OCR pipeline for ML training (tables, diagrams, math, multilingual) Hi HN, I’ve been working on an OCR pipeline specifically optimized for machine learning dataset preparation. It’s designed to process complex academic materials — including math formulas, tables, figures, and multilingual text — and output clean, structured formats like JSON and Markdown. Some features: • Multi-stage OCR combining DocLayout-YOLO, Google Vision, MathPix, and Gemini Pro Vision • Extracts and understands diagrams, tables, LaTeX-style math, and multilingual text (Japanese/Korean/English) • Highly tuned for ML training pipelines, including dataset generation and preprocessing for RAG or fine-tuning tasks Sample outputs and real exam-based examples are included (EJU Biology, UTokyo Math, etc.) Would love to hear any feedback or ideas for improvement. GitHub: https://bit.ly/3EhtxCm https://bit.ly/3EhtxCm April 3, 2025 at 06:48AM

Show HN: PythonECG – A minimal real-time ECG visualization tool https://bit.ly/3XITqld

Show HN: PythonECG – A minimal real-time ECG visualization tool I built a lightweight Python application that visualizes audio input as an ECG-like display. It's a simplified, open-source tool designed for educational purposes, signal visualization experiments, and prototyping. No commercial restrictions, just a clean interface with a single button to start/stop tracing. Built with PyAudio, Matplotlib, and Tkinter. Looking for feedback and contributions! https://bit.ly/4lefiz5 April 3, 2025 at 12:23AM

Show HN: OC Maker https://bit.ly/42fF1OK

Show HN: OC Maker I just made the cutest AI-powered OC maker! Feel free to design your original characters and use them in your storytelling or animation! https://bit.ly/3FPlLQC April 3, 2025 at 12:28AM

Show HN: I vibecoded a 35k LoC recipe app https://bit.ly/4hUdBnp

Show HN: I vibecoded a 35k LoC recipe app Over the last 2-3 weeks, I vibecoded the recipe app that I always wished existed - recipeninja.ai . It now includes a fully interactive voice assistant so you don't need to get your dirty hands over your new iPad when you're cooking. Background: I’m a startup founder turned investor. I taught myself (bad) PHP in 2000, and picked up Ruby on Rails in 2011. I’d guess 2015 was the last time I wrote a line of Ruby professionally. Last month, I decided to use Windsurf to build a Rails 8 API backend and React front-end app, using OpenAI's realtime API for voice-to-voice responses. Over the last few days, I also used Claude Code and Gemini 2.5 Pro for some of the trickier features. 35,000 LoC later, this is what I built! The site uses function-calling to navigate the site in realtime as you chat with the voice assistant, which I think is pretty neat. For the long version, see https://bit.ly/4leIllV... I'd love any feedback you have! Demo video of the voice assistant: https://www.youtube.com/watch?v=kRhVc9D5kcg Generate and edit new recipes: https://www.youtube.com/watch?v=VwwZF6dHcHg https://bit.ly/4iZsHJW April 2, 2025 at 02:57AM

Show HN: Fuck Lightroom and Fuck Adobe: How Adobe Is Systematically Predatory https://bit.ly/4hUb5gX

Show HN: Fuck Lightroom and Fuck Adobe: How Adobe Is Systematically Predatory https://bit.ly/4hZ4Fxd April 2, 2025 at 02:19AM

Show HN: Oxy – build SQL bots and automations easily https://bit.ly/42dBKzu

Show HN: Oxy – build SQL bots and automations easily Hey folks! We just launched a yaml-based open source framework for building SQL bots and automations called Oxy. You can build an answer engine for your team, automate report generation or deep dive analysis, etc. In short, we wanted to make it easier for analysts to build with LLMs. Would love to hear your thoughts! https://bit.ly/42mfS5k April 1, 2025 at 11:09PM

Show HN: Duolingo-style exercises but with real-world content like the news https://bit.ly/3RtrRZz

Show HN: Duolingo-style exercises but with real-world content like the news I've been working on a little side project that combines Duolingo-like listening comprehension exercises with real content . Every video is transcribed to get much better transcripts than the closed captions. I filter on high quality transcripts, and afterwards a LLM selects only plausible segments for the exercises. This seems to work well for quality control and seems to be reliable enough for these short exercises. Would love your thoughts! https://bit.ly/43AkBCv April 1, 2025 at 06:46AM

Show HN: CVE-Bench, the first LLM benchmark using real-world web vulnerabilities https://bit.ly/3FNjKo1

Show HN: CVE-Bench, the first LLM benchmark using real-world web vulnerabilities AI agents now have impressive reasoning capabilities. This raises an important question: how dangerous are these AI agents at identifying & exploiting web vulnerabilities? We created CVE-bench to find out (I'm one contributor of 16). To our knowledge CVE-bench is the first benchmark using real-world web vulnerabilities to evaluate AI agents' cyberattack capabilities. We included 40 CVEs from NIST's database, focusing on critical-severity vulnerability (CVSS > 9.0). To properly evaluate agents’ attacks, we built isolated environments with containerization and identified 8 common attack vectors. Each vulnerability took 5-24 person-hours to properly set up and validate. Our results show that current AI agents successfully exploited up to 13% of vulnerabilities without knowledge about the vulnerability (0-day). If given a brief description of the vulnerability (1-day), they can exploit up to 25%. Agents are all using GPT-4o without specialized training. The growing risk of AI misuse highlights the need for careful red-teaming. We hope CVE-bench can serve as a valuable tool for the community to assess the risks of emerging AI systems. Paper: https://bit.ly/4jg8hMo Code: https://bit.ly/4jcUshJ Medium: https://bit.ly/3FJW44a... Substack: https://bit.ly/4cfZVlt... https://bit.ly/4jcUshJ March 31, 2025 at 10:56PM

Show HN: I made a Chrome Extension to stop mindless browsing / avoid tab clutter https://bit.ly/4jb6VlZ

Show HN: I made a Chrome Extension to stop mindless browsing / avoid tab clutter Hey HN, I've created on a Chrome Extension called Lucid to help me maintain my focus while browsing. It has been working great for me, so I wanted to share it here. Whenever I start browsing with a certain intention, I always find myself get off track, doing some other thing, forgetting about my intention. This also leads to like 20+ cluttered tabs, not knowing what to keep or close. So I built Lucid. Simply stating my intention (1) creates a floating reminder that follows me everywhere, and (2) creates a tab group off of the intention so the tabs will be organized automatically. You can add multiple intentions as well. I hope this helps, and I would love to hear your feedback! CB https://bit.ly/4jxm3uj April 1, 2025 at 12:09AM

Show HN: I built an open-source NotebookLM alternative using Morphik https://bit.ly/3FYyYGQ

Show HN: I built an open-source NotebookLM alternative using Morphik I really like using NoteBook LM, especially when I have a bunch of research papers I'm trying to extract insights from. For example, if I'm implementing a new feature (like re-ranking) into Morphik, I like to create a notebook with some papers about it, and then compare those models with each other on different benchmarks. I thought it would be cool to create a free, completely open-source version of it, so that I could use some private docs (like my journal!) and see if a NoteBook LM like system can help with that. I've found it to be insanely helpful, so I added a version of it onto the Morphik UI Component! I'd love to hear the HN community's thoughts and feature requests! https://bit.ly/3DX90mE March 31, 2025 at 02:01AM

Show HN: I automate YT Shorts using this https://bit.ly/4iY4ljx

Show HN: I automate YT Shorts using this https://bit.ly/4c2tPth March 31, 2025 at 01:09AM

Show HN: PipZap – Zapping the mess out of the Python dependencies https://bit.ly/4c8Q1lC

Show HN: PipZap – Zapping the mess out of the Python dependencies https://bit.ly/441jzQ3 March 31, 2025 at 12:05AM

Show HN: Cloud-Ready Postgres MCP Server https://bit.ly/3RpxI1V

Show HN: Cloud-Ready Postgres MCP Server Hey HN, I built pg-mcp, a Model Context Protocol (MCP) server for PostgreSQL that provides structured schema inspection and query execution for LLMs and agents. It's multi-tenant and runs over HTTP/SSE (not stdio) Features - Supports multiple database connections from multiple agents - Schema Introspection: Returns table structures, types, indexes and constraints; enriched with descriptions from pg_catalog. (for well documented databases) - Read-Only Queries: Controlled execution of queries via MCP. - EXPLAIN Tool: Helps smart agents optimize queries before execution. - Extension Plugins: YAML-based plugin system for Postgres extensions (supports pgvector and postgis out of the box). - Server Mode: Spin up the container and it's ready to accept connections at http://localhost:8000/sse https://bit.ly/4hYL4xd March 30, 2025 at 04:14AM

Show HN: Owl - simple retro rpg https://bit.ly/3QVM7D6

Show HN: Owl - simple retro rpg Experience first-hand the wonderful world of owl photography! Owls aren’t big on having their photo taken, so learning how may take some time. While you play, be on the lookout for powerful upgrades. https://bit.ly/3DZXXZS March 30, 2025 at 01:40AM

Show HN: We open sourced a $50M neobank https://bit.ly/4iOpXip

Show HN: We open sourced a $50M neobank Open sourcing our neobank for nonprofits has been years in the making. We shared our initial launch here back in 2019 ( https://bit.ly/3FLrTJP ). Today, I’m happy to announce that our Ruby on Rails codebase is public on GitHub! https://bit.ly/3E1ujU6 March 30, 2025 at 12:48AM

Show HN: Create presentations with smart animations using Excalidraw https://bit.ly/43re0dz

Show HN: Create presentations with smart animations using Excalidraw I often create presentations where elements need to move (animate) from one slide to the next. This is great for explaining algorithms, workflows, or anything that benefits from dynamic visuals. I used to rely on Figma prototypes with smart animations for this, but I wanted a way to do it in Excalidraw—maybe even more conveniently. So I made an Excalidraw fork which helps you present "frames" and interpolates animations between them. Video demo (detecting cycles in a graph): https://bit.ly/42bK2rR... Instructions, tips, and current limitations: https://bit.ly/429SaJa... Try it: https://bit.ly/4laLvHl Personal plug: I'm also currently looking for a full-time job. If you know of any opportunities or can refer me, I'd really appreciate it. https://bit.ly/3DUimzz March 29, 2025 at 01:25PM