jsonl.co

jsonl.co

Open 1GB+ JSONL files in your browser. Free, no upload.

jsonl.co

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About

jsonl.co is a free, local-first JSONL viewer and editor for developers working with large .jsonl, .ndjson, .json, and .txt files. It streams 1GB+ files in chunks and renders visible rows in the browser. Inspect, validate, edit, search, and export data without uploading files or creating an account. Includes converters, a formatter, validator, splitter, merger, and JSON flattener.

Features

• Opens 1GB+ JSONL and NDJSON files directly in the browser.
• Streams files in chunks and renders only visible rows.
• Validates and edits records with raw and parsed views.
• Searches, converts, and exports data.
• Keeps files on-device without uploads or an account.

Use Cases: Create & Build

Tags: jsonl ndjson json-viewer

Software Types: Web App

Pricing Model Free

Added by Arrison Trnong on November 8, 2026