HugeJsonViewer: Free Windows JSON Viewer that Supports Large Files and Complex JSON Structure
Table of Content
HugeJsonViewer is a specialized, lightweight desktop application designed to efficiently open and explore extremely large JSON files, up to several gigabytes in size, such as 1.4 GB or more.
This app is built specifically for developers, data analysts, and system administrators working with massive datasets, it provides an intuitive interface to navigate complex JSON structures without crashing or freezing.
Despite being a niche tool from 2014–2024, HugeJsonViewer remains one of the few reliable options for viewing truly massive JSON files on Windows.
Its clean interface, robust parsing engine, and support for streaming formats like NDJSON make it a valuable asset in data-heavy workflows, even today.
Key Features & Benefits
- Handles Gigabyte-Sized Files: Can process JSON files that are 1 GB, 2 GB, or even larger, making it ideal for log files, API exports, configuration dumps, or database backups.
- Smart Memory Management: While the app requires roughly 7 times the file size in RAM (e.g., ~10 GB RAM for a 1.4 GB file), it's optimized to parse and display data incrementally, avoiding full loading into memory at once.
- Intuitive UI with Tabs & Filtering: The interface includes tabbed navigation and filtering capabilities, allowing users to quickly locate specific keys, values, or nested objects within huge datasets.
- Tree View Navigation: Presents JSON data in a collapsible, hierarchical tree structure, enabling easy exploration of deeply nested objects and arrays.
- Support for NDJSON (Newline Delimited JSON)
- Portable & Installer Options: Available both as a portable ZIP (no installation needed) and a standard installer (
Setup.exe), giving flexibility across environments.
License
The app is an open-source project that is released under the MIT License.
Resources & Downloads
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