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Free Online JSON, JSON Lines Viewer

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About the JSON, JSON Lines Viewer

This free online JSON, JSONL (JSON Lines) viewer lets you explore a text format where each line contains a valid JSON object. It is widely used in data pipelines, machine learning datasets, log files, and streaming applications because it allows processing one record at a time without loading the entire file into memory.

Our JSON Viewer provides a professional dual-pane interface for inspecting JSON files. The left pane displays the raw data while the right pane shows a beautifully formatted, interactive parsed view. You can search across all records instantly, toggle soft-wrap for long lines, and navigate large datasets with ease. All processing happens locally in your browser, so your data never leaves your device.

How to Use

Upload File: Drag and drop a .jsonl or .json file, or click "Upload" to browse.
Browse Records: Scroll through parsed objects in the right panel.
Search: Use the search bar to find specific keys or values across all records.
Navigate Matches: Use the arrow buttons to jump between search results.

Key Features

Dual-Pane View: Raw data and formatted view side by side for easy inspection.
Deep Search: Search across all keys and values in your entire dataset.
Drag and Drop: Simply drop files onto the page to start viewing.
Privacy First: All parsing runs locally in your browser with zero server uploads.