Show HN: CSV GB+ by Data.olllo – Open and Process CSVs Locally

I built CSV GB+ by Data.olllo, a local data tool that lets you open, clean, and export gigabyte-sized CSVs (even billions of rows) without writing code.

Most spreadsheet apps choke on big files. Coding in pandas or Polars works—but not everyone wants to write scripts just to filter or merge CSVs. CSV GB+ gives you a fast, point-and-click interface built on dual backends (memory-optimized or disk-backed) so you can process huge datasets offline.

Key Features: Handles massive CSVs with ea

Show HN: Lumier – Run macOS VMs in a Docker

Hey HN, we're excited to share Lumier (https://github.com/trycua/cua/tree/main/libs/lumier), an open-source tool for running macOS and Linux virtual machines in Docker containers on Apple Silicon Macs.

When building virtualized environments for AI agents, we needed a reproducible way to package and distribute macOS VMs. Inspired by projects like dockur/windows (https://github.com/d

Launch HN: Jazzberry (YC X25) – AI agent for finding bugs

Hey HN,

We are building Jazzberry (https://jazzberry.ai), an AI bug finder that automatically tests your code when a pull request occurs to find and flag real bugs before they are merged.

Here’s a demo video: #t=7" rel="nofollow">

#t=7

We are building Jazzberry to help you find bugs in your code base. Here’s how it works:

When a PR is made, Jazzberry cl

Show HN: Sam TTS – Recreates the classic Microsoft SAM voice in the browser

Hi HN,

I built a fun little side project that recreates the classic Microsoft SAM voice from Windows XP—entirely in the browser.

SAM TTS uses phoneme-based synthesis (no AI models), written in JavaScript with Web Audio API. You can type any text, adjust pitch/speed/mouth/throat settings, and instantly hear the robotic voice we all remember from early 2000s computers.

You can even download the generated audio as a WAV file, which makes it handy for game developers, meme creators, retro


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