Show HN Daily Selection (2025-10-14)
- SQLite Online – 11 years of solo development, 11K daily users
- Make AI text sound human
- I wrote a VectorDB in Go, built for Hackers, not Hyperscalers
- FFTN, faster than FFTW in 700 lines of C
- No-Code REST APIs (and LLM Tools/MCPs) for Postgres
- Local Browser AI
- I made a calculator that works over disjoint sets of intervals
- ch, a terminal tool to highlight specific words in your command output
- Cashflow planner for solopreneurs confidential by design
- Cadence – A Guitar Theory App
- AirFryPro – Convert any oven recipe to air fryer
- YPS: YAML Positioning System
SQLite Online – 11 years of solo development, 11K daily users [Developer Tools]
320 points, 110 comments
SQLite Online is a web-based SQLite database tool developed over 11 years with 11K daily users.
- Web-based SQLite database tool
- 11 years of solo development
- 11K daily active users
Discussion Link, Original Link
Make AI text sound human [Text]
3 points, 0 comments
Transform AI-generated text into natural, human-like writing with one click.
- Works with ChatGPT, Claude, and Gemini
- One-click transformation
- Improves readability and authenticity
Discussion Link, Original Link
I wrote a VectorDB in Go, built for Hackers, not Hyperscalers [Developer Tools]
7 points, 0 comments
A lightweight VectorDB written in Go, designed for simplicity and practicality rather than large-scale enterprise use.
- Built in Go for performance and simplicity
- Focused on practical use cases for hackers and small projects
- Avoids complexity of hyperscale solutions
Discussion Link, Original Link
FFTN, faster than FFTW in 700 lines of C [Developer Tools]
3 points, 0 comments
A fast FFT implementation in 700 lines of C, optimized for large arrays and outperforming FFTW.
- Uses arrays of arbitrary dimension for FFT design instead of traditional tensor products
- Optimized for powers of 2 and arrays larger than cache size
- Achieves high performance with minimal complexity using modern compilers
- Future plans to extend to other cases (mixed radix, higher dimensions) using a higher-level language (SaC)
Discussion Link, Original Link
No-Code REST APIs (and LLM Tools/MCPs) for Postgres [Developer Tools]
3 points, 3 comments
No-code platform to create REST APIs, LLM tools, and MCP servers from Postgres databases.
- Instantly generates production-ready REST APIs from Postgres
- Auto-creates LLM tool definitions and MCP servers from SQL
- Deploy to cloud or export as Node.js app for self-hosting
- Designed for quick setup and minimal coding effort
Discussion Link, Original Link
Local Browser AI [ChatBots]
13 points, 2 comments
Local Browser AI is a free, open-source, privacy-focused chat extension that runs on multiple platforms using the new Prompt API.
- Free and open-source
- Privacy-first approach
- Works on Chrome, Edge (Linux, Mac, Windows, ChromeOS)
- Utilizes the new Prompt API
Discussion Link, Original Link
I made a calculator that works over disjoint sets of intervals [Developer Tools]
5 points, 0 comments
A calculator implementing interval union arithmetic to handle division by zero and discontinuous functions accurately.
- Handles division by intervals containing zero by returning disjoint interval unions
- Supports non-continuous functions like tan()
- Implements interval union arithmetic based on a 2017 research paper
- Written in TypeScript with no dependencies
- Uses IEEE 754 double precision floats with outward rounding for accuracy
- Provides an interactive calculator interface for experimentation
Discussion Link, Original Link
ch, a terminal tool to highlight specific words in your command output [Developer Tools]
4 points, 0 comments
A terminal tool to highlight specific words in command output with colors for better readability.
- Highlights specific words in command output
- Uses colors for better visibility
- Useful for tailing logs and debugging
- Simplifies command output analysis
Discussion Link, Original Link
Cashflow planner for solopreneurs confidential by design [Finance]
3 points, 0 comments
Cashflow planner for solopreneurs with a focus on privacy and ease of use.
- Designed for tracking money flow and controlling balance
- Built with security best practices from crypto wallets and password managers
- Confidential by design to ensure privacy
Discussion Link, Original Link
Cadence – A Guitar Theory App [Education]
6 points, 0 comments
A guitar theory and ear training app designed for intermediate players, offering lessons, challenges, and a comprehensive library.
- Targets intermediate guitarists with structured lessons and challenges
- Includes visual, audio, and theory-based exercises with progressive difficulty
- No ads, lifetime purchase option, and offline usability
- Inspired by language learning apps for gradual skill retention
- Available on Android and iOS
Discussion Link, Original Link
AirFryPro – Convert any oven recipe to air fryer [Life Assistant]
5 points, 2 comments
Convert any oven recipe to air fryer with AirFryPro.
- Adapts oven recipes for air fryer use
- Simplifies cooking adjustments
- Enhances convenience for air fryer users
Discussion Link, Original Link
YPS: YAML Positioning System [Developer Tools]
4 points, 0 comments
A Ruby Gem that adds position tracking to YAML-parsed objects for debugging and validation.
- Parses YAML and attaches position information (filename, line, column) to each object
- Provides a
#positionmethod to retrieve location details - Helps identify invalid or unexpected values in large YAML documents
- Works with standard Ruby YAML parsing