Show HN: Spotilyrics – See synchronized Spotify lyrics inside VS Code https://ift.tt/UJi3pbS September 1, 2025 at 12:09AM

Show HN: Free printable coloring pages for K-Pop Demon Hunters I made a tiny, single-topic coloring pages site focused on K-Pop Demon Hunter...

Show HN: An interface for doing research fast with an LLM I built ProRead as a new interface for researching anything with an LLM. Instead o...

Show HN: I made an English version of the game "Funeral of Freiren" https://ift.tt/N5aSJxC August 31, 2025 at 01:18AM

Show HN: A collection of generic header only data structures written in C https://ift.tt/juXUrLa August 30, 2025 at 01:40AM

Show HN: ElectroBench A benchmark I've maintained for a few years, tell me your scores. https://ift.tt/M3bsWng August 29, 2025 at 10:46P...

Show HN: Envoy – Command Logger Envoy is a lightweight, background utility that logs your terminal commands. It's designed to be a simpl...

Show HN: HTMS (write JavaScript using HTML) Don't ask me where this idea came from. But a couple of years ago I had this crazy idea of w...

Show HN: StripeMeter – Open-Source Usage Metering for Stripe Billing We built StripeMeter, an open-source usage metering platform that plugs...

Show HN: Smart Buildings Powered by SparkplugB, Aklivity Zilla, and Kafka https://ift.tt/j6NTglr August 28, 2025 at 10:33PM

Show HN: Pocket Agent: run Claude, Cursor, Codex and more from your phone Hi HN, I built Pocket Agent — a mobile-first interface for coding ...

Show HN: I fine-tuned GPT4.1 on my iMessage history https://ift.tt/QLbhCio August 28, 2025 at 03:48AM

Show HN: Karton is a simple, type-safe RPC and state-syncing framework (OSS,MIT) Karton (German for “carton”) is a type-safe and web socket ...

Show HN: Testronaut – AI-powered mission-based browser testing Hi HN, I’ve been working on a project called *Testronaut*, an autonomous test...

Show HN: Dsa.rb: Practice core dsa in Ruby from the command line I made a DSA practice tool for Ruby. It’s test-driven, runs locally, and is...

Show HN: Checkpoints for Claude Code [video] https://www.youtube.com/watch?v=0lNL4K-75PE August 27, 2025 at 02:29PM

Show HN: Regolith – Regex library that prevents ReDoS CVEs in TypeScript I wanted a safer alternative to RegExp for TypeScript that uses a l...

Show HN: MaskWise: Redact, mask, and anonymize data in training files for LLMs If you’re working with LLM training data (like I often am), y...

Show HN: I estimated the carbon impact of different LLMs (did my best with the data that is available online) https://ift.tt/VTP309H August ...

Show HN: Stop saving your scans on 3rd party servers Hi HN, I built DocsOrb to solve a simple but stressful problem (and my own problem too ...

Show HN: I built an AI trip planner https://milotrips.com August 25, 2025 at 10:09PM

Show HN: RAG-Guard: Zero-Trust Document AI Hey HN, I wanted to share something I’ve been working on: *RAG-Guard*, a document AI that’s all a...

Show HN: Timep – A next-gen profiler and flamegraph-generator for bash code Note: this is an update to [this]( https://ift.tt/N8n3j4X ) ...

Show HN: Decentralized Bitcoin Incentives via QR Codes DT7-QR Rewards System – (Open Source Proposal) https://ift.tt/kBcgD01 August 25, 2025...

Show HN: FilterQL – A tiny query language for filtering structured data Hey all, I just released v2.0.0 of FilterQL, a query language and Ty...

Show HN: LoadGQL – a CLI for load-testing GraphQL endpoints Hi HN I’ve been working with GraphQL for a while and always felt the tooling aro...

Show HN: I built aibanner.co to stop spending hours on marketing banners https://www.aibanner.co August 24, 2025 at 01:27AM

Show HN: HypeVortex: Combining Crypto and AI in the stupidest way possible I work at a so called "hyperscaler" in billing and invo...

Show HN: My First Game Made with My Homemade Engine https://reprobate.site/ August 22, 2025 at 10:33PM

Show HN: Lumo – a tiny fluffy virtual pet you can play with in the browser This is Lumo, a tiny fluffy virtual pet that lives in your browse...

Show HN: GPT-5 vs. Claude 4 Sonnet on 200 Requests Benchmark We Released an independent evaluation of GPT-5 vs Claude 4 Sonnet across 200 di...

Show HN: Changefly ID + Anonymized Identity and Age Verification Hey HN! I’m Lukas Dickie the founder of Changefly and I’m truly excited to ...

Show HN: SIMD-Optimized Bloom Filters in Mojo for Large-Scale Systems https://ift.tt/Docd78v August 21, 2025 at 11:56PM

Show HN: Infinite Tetris Grid You can scroll left and right forever If you press the ∞ button, you can scroll up forever https://lazyblocks....

Show HN: DeVibe – Connecting vibe coders with developers Hi HN, I noticed that many vibe coders have a problem with building their apps. It...

Show HN: PineBill – make invoices in the browser (free, no ads, no account) Hello everyone, I was tired of bloated invoicing apps, paywalls,...

Show HN: Network-filter – domains-based whitelist for Docker containers Built this because LLM tools with MCP servers (OpenCode, Goose, Clau...

Show HN: Rucat – Cat for Prompt Engineers Aloha HN - I'm redbeard, ex-CoreOS homey, RISC-V guy, and general free software wingnut. Like ...

Show HN: Skilfut – 138 UI components to help devs build faster and prettier Hi HN, I’m César, a non-developer who started building prototype...

Show HN: Side Space – An Arc-like AI-powered Vertical tabs manager for Chrome Side Space is an AI-powered browser extension for managing tab...

Show HN: Memeclip.ai – AI-powered meme maker that turns text into memes Hey HN! I built MemeClip.ai - an AI meme maker that transforms any t...

Show HN: Keystroke-Based Digital Signatures https://ift.tt/ULhvc5N August 18, 2025 at 11:18PM

Show HN: BoneClone – A tool to autodiscover repos to propagate skeleton changes https://ift.tt/80tNAJH August 17, 2025 at 10:08PM

Show HN: RouteScout – A bike routing app that lets you love or hate hills Hi HN, I’m a high school student in Seattle who loves riding hills...

Show HN: Procrastinope, an open-source website blocker I built Procrastinope, an open-source alternative to Cold Turkey Blocker that focuses...

Show HN: A condensed CS book called Computers, written by Claude Code https://ift.tt/PCUFkc6 August 16, 2025 at 05:31PM

Show HN: MCP Server for Spotify – control playback, queue, playlists I’ve built an MCP (Model Context Protocol) server for Spotify, so you c...

Show HN: Agentic Sync – AI-Native Task Management Platform What This Does For You Agentic Sync is a prototype-demo task management system sp...

Show HN: Run Your Own ChatGPT Agent on Cloudflare Containers Hi HN! I was disappointed when the ChatGPT Agent announcement came with the not...

Show HN: Understanding the Spatial Web Browser Engine After absorbing opinions from the previous post, I wrote an article specifically intro...

Show HN: Nabu (TTS Reader and LLM Playground on Android) With the latest launch from Google I've added support for Gemma 3 270M, the spe...

Show HN: ClipDump – A Clipboard Dumper for Windows Saves every bit of the clipboard to the filesystem. Configurable ignore list, save path. ...

Show HN: Gitego – Automatic Git identity switcher # gitego: Automatic Git Identity Switcher I was juggling work and personal GitHub accounts...

Show HN: Real-time privacy protection for smart glasses I built a live video privacy filter that helps smart glasses app developers handle p...

Show HN: Mock Interviews for Software Engineers https://ift.tt/WufmnMg August 14, 2025 at 12:02AM

Show HN: Emailcore – write chiptune in plain text in the browser I tried using the AudioContext API to make the most primitive browser-based...

Show HN: A fun side project on chivalry and virtues Hi Hacker News, I'm excited to share a small side project I've been working on: ...

Show HN: Turn your iPhone into a local OCR server using Vision Framework Built an iOS app that runs a local OCR server using Apple's Vis...

Show HN: Enter your domain and my open-source agent will hack it I built an open-source AI agent for security testing to find and fix vulner...

Show HN: Keeps – Mail a postcard that plays your voice Hi everyone — I’m Clark, creator of Keeps, a way to send physical postcards that play...

Show HN: A Choose-Your-Own-Adventure Constructed by Claude Code https://ift.tt/fFdKyTP August 11, 2025 at 11:19PM

Show HN: QuotationGenie – Create and Track Quotes, Invoices, and Contracts With QuotationGenie you can: Create customized quotations in minu...

Show HN: A Sinclair ZX81 retro web assembler+simulator Lots of fun to do. I would have not taken the time without the speedup provided by Cl...

Show HN: A reading to remind us to keep raising our voices against oppression https://ift.tt/g8ZOmke August 10, 2025 at 01:24PM

Show HN: Play Brainrot Games Online Brainrot Game is a free-to-play, browser-based hub that serves up instant, meme-fueled mini-games—think ...

Show HN: AI Coloring Pages Generator Hey Ycombinator News community! I'm excited to share AI Coloring Pages Generator with you all! As a...

Show HN: AI feedback on system design diagrams Hey everyone, I made a tool to practice System Design for technical interviews. I am currentl...

Show HN: Keywords for Self-Talk https://plastithink.com August 9, 2025 at 08:29AM

Show HN: I made a safe anonymous message app Subrosa is an anonymous message-sharing platform where anyone can visit your unique link and wr...

Show HN: Tiered storage and fast SQL for InfluxDB 1.x/2.x If you’ve run InfluxDB at scale, you know the pain: Retention policies mean throwi...

Show HN: Trayce – “Burp Suite for developers” About a year ago I introduced Trayce to HN as the "network tab for docker containers...

Show HN: Fiig – Reimagining Google scholar for AI research and PDF annotation With all the new study modes and learning-targeted AI models, ...

Show HN: I built a simple tool to automate data into Google Sheets and BigQury I’ve been a freelance data analyst/developer for a while and ...

Show HN: From Hacking a T480 to the Fastest Open-Hardware 75 Hz E-Ink Display Three years ago, I posted here about hacking together a fast e...

Show HN: I Built Economic Safety Mechanisms for AI Title: I Built Economic Safety Mechanisms for AI - Seeking Feedback I have implemented th...

Show HN: I built a political quiz that maps ideologies in 3D using 39 dimensions https://ift.tt/8S4YBc1 August 7, 2025 at 02:39AM

Show HN: 3D Chess https://ift.tt/M16WpV7 August 7, 2025 at 12:41AM

Show HN: CSV Mail Sender – Send personalized email campaigns from a CSV https://ift.tt/kz0GpPR August 6, 2025 at 11:28PM

Show HN: Twitter Viewer – View & Download Tweets and Media Without an Account https://ift.tt/H3OPmho August 6, 2025 at 04:57AM

Show HN: Virtual Ontologies with Claude Code https://ift.tt/AjeJgur August 6, 2025 at 02:20AM

Show HN: Supanotice – Branded newspage and in-app widget to show product updates https://supanotice.com August 5, 2025 at 11:06PM

Show HN: Read the RFCs That Built the Internet Hi HN! I was using AI tools to research some of the RFCs people recommend you read and I thou...

Show HN: Using DSPy to enrich a dataset of the Nobel laureate network I've been working a fair bit with DSPy lately, and I did some work...

Show HN: I built the fastest VIN decoder Decodes any VIN in ~20ms with zero network calls. I compressed the entire NHTSA vehicle database in...

Show HN: I've been building an ERP for manufacturing for the last 3 years https://ift.tt/NIiHcjK August 4, 2025 at 11:24PM

Show HN: Schematra – Sinatra-inspired minimal web framework for Chicken Scheme I started this project a couple of weeks ago because I was st...

Show HN: QuantumFlow Toolkit – An open-source framework hybrid quantum workflows Hey everyone, I'm excited to share a new project I'...

Show HN: Andre – A privacy-first, location-aware assistant that helps you Hi HN, I've been working on a different kind of life assistant...

Show HN: Structured Cooperation – A new way of building distributed apps & POC Hey HN, I wanted to share something I've been working...

Show HN: Visualize your dev project with an AI roadmap tool https://www.archaltect.pro/ August 3, 2025 at 12:11PM

Show HN: Voltpeek – A Vim inspired oscilloscope software This is software for my headless, PC based oscilloscope, which is controlled entire...

Show HN: AI Physics Tutor with Free Body Diagrams Hi HN. I built a prototype AI physics tutor that can interpret, draw, and edit free body d...

Show HN: I made a mobile game you can only play on the toilet https://poopmatch.com August 2, 2025 at 10:33AM

Show HN: A Toy Sound Generator https://ift.tt/GhjR2Py August 2, 2025 at 05:17AM

Show HN: Agentic AI Frameworks on AWS (LangGraph,Strands,CrewAI,Arize,Mem0) We’ve published a set of open-source reference implementations o...

Show HN: Windows XP in the browser, with file system, Word, media, flash https://ift.tt/LCayWoT August 2, 2025 at 02:11AM