I’ve built Slicelytics after years of building and maintaining production integrations of data from wearables and medical algorithms. It’s a flexible way to compare outputs of different algorithm versions, inspect API responses where you might only care about a small chunk of the data, review snapshot changes that GitHub can’t handle, etc. without having to write any throwaway code to do it.

It handles formats, like CSV, JSON, NDJSON, TOON & also does decompression of gzipped and Zstandard-compressed (zstd) files on the fly. Those are the formats I’ve had use for so far, but would be great to hear if you’re missing support for anything else. What I find great day-to-day is that you can just drag-and-drop a multi-gigabyte compressed file into the app, and it lets you see any item/record/log you want right away.

The visualization view supports basics like bar charts, line charts, etc. and calculation of some common stats like averages, standard deviations, and similar. Almost everything is keyboard-friendly. All your data stays in the browser.

What do you think?