Reading 50MB JSONL logs with a viewer in 2026
Use a browser-based JSONL viewer that parses each line as its own JSON object and lays the results out in a filterable, sortable table. That's the fastest way to read newline-delimited logs without writing a throwaway script. Paste the file, get columns, filter to the rows you care about, export what's left. No terminal gymnastics and no 2GB file crashing your editor. Works offline because everything runs client-side.
The jsonl viewer I link to below is one I built. I got tired of it: I tried six different online JSON tools last spring and every one of them choked the moment I pasted newline-delimited data, because they all assume a single JSON document and JSONL is a stream of them. Mine runs entirely in your browser. No signup, no upload, nothing leaves your machine, and it's free. If you've got a better one, please tell me.
The log file that killed my text editor
Last Tuesday, around 2am, I was chasing a production timeout. The only evidence I had was an NDJSON log the service had been streaming to disk: 340 MB, roughly 1.2 million lines, one JSON object per line. I did the obvious thing first and opened it in my editor. It thought about that for a while. The fans spun up. Then the window went white and stopped responding. Cool.
