You can try jq, check

  • https://stedolan.github.io/jq/
  • https://stedolan.github.io/jq/download/

It's very useful

Answer from Gilles Quรฉnot on Stack Overflow
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Finetunedb
finetunedb.com โ€บ tools โ€บ jsonl-viewer
JSONL Viewer | FinetuneDB
JSONL Viewer and Formatter - Convert JSONL Files to a Friendly Readable Format
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Visual Studio Marketplace
marketplace.visualstudio.com โ€บ items
JSON Lines Viewer - Visual Studio Marketplace
Extension for Visual Studio Code - View each line of JSON Lines file in json format
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Table Studio
table.studio โ€บ viewer โ€บ jsonl
JSONLines Viewer Online - Open JSONLines File
Our JSONLines viewer allows you to visualize, query, and generate graphs from your data using AI.
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Jsonltools
jsonltools.com โ€บ jsonl-viewer
JSONL Viewer Online - JSONL Tools
View and navigate through JSONL files online with our easy-to-use JSONL viewer tool.
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Jsonlines
jsonlines.org
JSON Lines
This page describes the JSON Lines text format, also called newline-delimited JSON. JSON Lines is a convenient format for storing structured data that may be processed one record at a time. It works well with unix-style text processing tools and shell pipelines.
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JSON Formatter
jsonformatter.org โ€บ json-viewer
JSON Viewer Online Best and Free
JSON Viewer Online helps to Edit, View, Analyse JSON data along with formatting JSON data.
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GitHub
github.com โ€บ lehoanganh298 โ€บ json-lines-viewer
GitHub - lehoanganh298/json-lines-viewer: VSCode extension for preview JSON Lines file ยท GitHub
This extension provides previews for JSON Lines (JSONL) files.
Starred by 7 users
Forked by 3 users
Languages ย  TypeScript
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JSON Viewer
jsonviewer.stack.hu
Online JSON Viewer and Formatter
JSON Viewer and Formatter - Convert JSON Strings to a Friendly Readable Format
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JSON Editor Online
jsoneditoronline.org
JSON Editor Online: edit JSON, format JSON, query JSON
JSON Editor Online is the original and most copied JSON Editor on the web. Use it to view, edit, format, repair, compare, query, transform, validate, and share your JSON data.
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NCBI
ncbi.nlm.nih.gov โ€บ datasets โ€บ docs โ€บ v2 โ€บ reference-docs โ€บ file-formats โ€บ metadata-files โ€บ tools-for-jsonl
Tools for JSON and JSON Lines - NCBI
There are many tools for processing JSON and JSON Lines data. One commonly used tool is jq. This tool is open source, available for many platforms, often included in modern Linux distributions, and described as the JSON equivalent of grep, sed, and awk. Note that although jq is reasonably easy for simple transformations, it may be exceptionally difficult to grasp for even moderately complex operations.
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JSONL Viewer
jsonl-viewer.com
Free Online JSON, JSON Lines Viewer - JSONL Viewer
Free online JSON and JSON Lines viewer. Upload, search, and inspect your data with ease. No installation required.
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GitHub
github.com โ€บ ibndias โ€บ jsonlviewer
GitHub - ibndias/jsonlviewer: A lightweight, web-based JSON and JSONL file viewer with interactive features
A lightweight, web-based JSON and JSONL (JSON Lines) file viewer with an intuitive interface and powerful features for exploring structured data.
Author ย  ibndias
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GitHub
github.com โ€บ informationsea โ€บ JSONLinesViewer
GitHub - informationsea/JSONLinesViewer: Simple JSON Lines Viewer
Simple JSON Lines Viewer. Contribute to informationsea/JSONLinesViewer development by creating an account on GitHub.
Author ย  informationsea
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Dadroit
dadroit.com
Dadroit JSON Viewer
Troubleshoot issues in gigabytes of JSON log data with Dadroit JSON viewer. You can browse and query JSON log files like databases and extract value from your data. Monitor your service status with the auto-refresh ability and make a quick response ...
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Visual Studio Marketplace
marketplace.visualstudio.com โ€บ items
View & Edit JSONL Files - Visual Studio Marketplace
April 19, 2025 - Extension for Visual Studio Code - View and edit each line of JSON Lines file in json format
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jless.io
jless - A Command-Line JSON Viewer
jless is a command-line JSON viewer designed for reading, exploring, and searching through JSON data.
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Hndy Tools
hndytools.com โ€บ tools โ€บ jsonl-viewer
JSONL Viewer - Interactive JSON Lines Explorer | Hndy Tools
Interactive JSONL (JSON Lines) viewer with expand/collapse and syntax highlighting.
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Jsonhero
jsonhero.io
JSON Hero - a beautiful JSON viewer for the web
JSON Hero makes reading and understand JSON files easy by giving you a clean and beautiful UI packed with extra features.