Browser-based JSONL viewer handles large log files without terminal or editor crashes

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A developer has built a free, browser-based JSONL viewer after finding that most online JSON tools fail to handle newline-delimited log data. The tool parses each line of a JSONL file independently, displaying results in a filterable and sortable table entirely client-side, with no uploads or sign-up required. The project was born out of a late-night production debugging session where a 340MB, 1.2-million-line log file crashed a code editor and proved tedious to navigate using command-line tools like jq. Unlike standard JSON parsers that expect a single document, the viewer treats each line as a separate JSON object, meaning a malformed line does not break the rest of the output. The tool is available for free and works offline, making it a practical alternative for engineers who regularly work with large log files.

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