Thanks, this is great! It's something I'd long mused about creating but never got to the point of setting pen to paper.
On Thu, Oct 30, 2025 at 11:02 AM Julien Le Dem <[email protected]> wrote: > I mentioned in the sync that I did a little Parquet file metadata > visualizer. > I wanted to have something to help people who are benchmarking Parquet and > want to take a look at what the pages look like and verify that the choices > on page size or encoding are not creating degraded performance. > This is made with claude code and doubles as my personal experimentation > with AI coding. > Note that I don't really know typescript or front end development, so code > quality may vary. > Requirements: > - run entirely in the browser. (It is using hyparquet!) > - display the page metadata by iterating through the page headers for a > given column chunk. > - it is trying to be careful of memory usage, I have loaded 2GB+ Parquet > files with many columns in it. > https://github.com/julienledem/parquet-metadata-vizualizer > I have published it here, if you want to play with it: > https://julien.ledem.net/experiment/parquet-visualizer.html > There is no backend. It is all running in your browser. > Here is an example with the NY taxi data > [image: Screenshot 2025-10-30 at 10.58.53 AM.png] >
