Show HN Daily Selection (2025-08-15)
- OWhisper – Ollama for realtime speech-to-text
- I built a free alternative to Adobe Acrobat PDF viewer
- MCP Security Suite
- Modelence – Supabase for MongoDB
- Yet another memory system for LLMs
- Happy Coder – End-to-End Encrypted Mobile Client for Claude Code
- E-commerce data from 100k stores that is refreshed daily
- Generate random gradients like on OpenAI's website
- CompareLists – compare two or more lists to find differences
- NTP diag tool, as is Ping for ICMP
- Minimal Counter
- YouTube Audio Player
- I just built a tool to turn any photo into pixel art
- We made a 2.5GB Offline disaster AI assistant [video]
- Babami.app Talking to my grandma without shouting
OWhisper – Ollama for realtime speech-to-text [Audio]
97 points, 32 comments
OWhisper is a tool for downloading and running on-device, realtime speech-to-text models like Whisper and Moonshine.
- Provides CLI tools to easily download and run STT models
- Supports multiple models including Whisper and Moonshine
- Designed for practical, on-device realtime speech-to-text
- Plans to integrate custom STT endpoints for Hyprnote desktop app
- Available for immediate use with simple installation via Homebrew
Discussion Link, Original Link
I built a free alternative to Adobe Acrobat PDF viewer [Developer Tools]
152 points, 35 comments
A free, open-source PDF viewer with features matching Adobe Acrobat, designed to be lightweight and embeddable.
- Annotations (highlight, sticky notes, free text, ink)
- True redaction (content actually removed)
- Search, text selection, zoom, rotation
- Runs fully in the browser, no server needed
- Drop-in SDK for React, Vue, Preact, vanilla JS
- MIT-licensed and open-source
Discussion Link, Original Link
MCP Security Suite [Developer Tools]
18 points, 14 comments
An open-source analyzer to detect MCP tool vulnerabilities like prompt injection and credential exfiltration that traditional scanners miss.
- Scans for prompt injection, credential exfiltration, suspicious updates, and tool shadowing
- Adds less than 10ms overhead during runtime
- Fully local with no telemetry
- Addresses vulnerabilities missed by traditional scanners (e.g., CodeQL, SonarQube)
- Open-source and available on GitHub
Discussion Link, Original Link
Modelence – Supabase for MongoDB [Developer Tools]
26 points, 8 comments
Modelence is an all-in-one backend platform for TypeScript and MongoDB teams, offering Supabase-like features for MongoDB.
- Authentication and user management
- MongoDB database integration
- Email integration (e.g., user verification)
- AI integration
- Cron jobs
- Monitoring and telemetry
- Configs and secrets management
- Frontend-agnostic (works with React, Next.js, etc.)
- Managed cloud service in development (similar to Vercel for backends)
- Upcoming features: analytics and file uploads
Discussion Link, Original Link
Yet another memory system for LLMs [Developer Tools]
153 points, 43 comments
A memory system for LLMs with searchable, persistent storage and block-level deduplication.
- Content-addressed storage with 30-40% space savings on typical codebases
- Designed for local research and LLM workflows
- CLI tool integrates with Zed, Claude Code, and Cursor
- Includes example prompts in the repository
- Built in C++, tested on macOS and Ubuntu 24.04
Discussion Link, Original Link
Happy Coder – End-to-End Encrypted Mobile Client for Claude Code [Developer Tools]
20 points, 5 comments
Happy Coder is an end-to-end encrypted mobile client for Claude Code that enables seamless coding assistance across devices with hands-free voice interaction.
- Seamless transition between desktop and mobile without disrupting workflow
- Full end-to-end encryption with locally generated keys for privacy
- Hands-free voice interaction via 11Labs' realtime SDK (no stored audio/transcripts)
- Cross-platform compatibility (iOS, Android, web, iPads, foldables)
- Free to use with potential future monetization for voice inference or custom API keys
Discussion Link, Original Link
E-commerce data from 100k stores that is refreshed daily [E-commerce]
10 points, 4 comments
Agora is an AI-powered e-commerce search engine with daily-updated data from 100k stores, offering raw data access via a Data Connector.
- Provides real-time access to 30M products from 100k stores
- Data Connector allows exporting store data as CSV or JSON
- Crawls Shopify, WooCommerce, Squarespace, Wix, and custom stores
- Recrawls entire dataset daily using rotating proxies and high-performance servers
- Uses MongoDB and self-hosted Meilisearch for fast search results
- Aims to index global e-commerce data for market efficiency
Discussion Link, Original Link
Generate random gradients like on OpenAI's website [Design]
24 points, 8 comments
Generate random gradients similar to those on OpenAI's website.
- Creates visually appealing gradient backgrounds
- Mimics the style used by OpenAI
- Simple and easy to use
- No additional text or context provided
Discussion Link, Original Link
CompareLists – compare two or more lists to find differences [Productivity]
3 points, 1 comments
CompareLists – compare two or more lists to find differences.
- Compares multiple lists simultaneously
- Identifies differences between lists
- Simple and straightforward tool for list comparison
Discussion Link, Original Link
NTP diag tool, as is Ping for ICMP [Developer Tools]
5 points, 0 comments
A diagnostic tool for NTP similar to how Ping works for ICMP.
- Tests NTP server responsiveness
- Simple and lightweight diagnostic utility
- Similar functionality to ICMP Ping but for NTP protocol
Discussion Link, Original Link
Minimal Counter [Productivity]
9 points, 3 comments
Minimal Counter
- Simple and lightweight counter tool
- No additional features or complexity
Discussion Link, Original Link
YouTube Audio Player [Audio]
6 points, 5 comments
YouTube Audio Player allows users to stream only the audio from YouTube videos, saving bandwidth and battery.
- Background listening with screen off or while using other apps
- Data Saver Mode optimizes audio quality for connection
- No video ads or visual distractions
- Reduces power consumption by up to 60% compared to video playback
Discussion Link, Original Link
I just built a tool to turn any photo into pixel art [Image]
4 points, 2 comments
A web tool that converts photos into customizable pixel art with color quantization and pixelation algorithms.
- Automatically transforms uploaded photos into pixel art
- Uses color quantization and pixelation for retro aesthetics
- Customizable settings to balance detail and pixel art style
- Ideal for avatars, digital art, and game assets
- Fast and user-friendly interface
Discussion Link, Original Link
We made a 2.5GB Offline disaster AI assistant [video] [Life Assistant]
4 points, 4 comments
Offline AI assistant prototype for disaster response, created for DeepMind's Gemma 3n Impact Challenge.
- Designed to work offline with a 2.5GB footprint
- Built by beginners in local LLMs as a learning project
- Aims to inspire more lightweight LLM models in the future
Discussion Link, Original Link
Babami.app Talking to my grandma without shouting [Health]
6 points, 0 comments
An app designed to facilitate easier communication with elderly relatives, particularly those with hearing difficulties.
- Enables communication without shouting
- Tailored for elderly users, like grandparents
- Simplifies interaction for users with hearing impairments