TREE
Navigate the hierarchy
Expand deeply nested structures and jump straight to the node you need.
A desktop app for working with huge JSON files
GigaScope JSON Works
Browse and edit JSON smoothly with a synchronized hierarchical tree view, graph view, search bar, and editor. Work with the full contents of small and medium-sized files, or use Index Mode to explore and make partial edits to multi-gigabyte files.
Download for Windows
Free, commercial use allowed
Features
Six connected features for exploring, searching, and editing JSON
GigaScope JSON Works combines tree navigation, graph visualization, search, detail inspection, and editing.
These features provide a connected workflow for JSON, JSONL, and GeoJSON.
It handles both small configuration files and GB-scale data efficiently.
GRAPH
See nearby relationships
Visualize parents, children, and siblings so local structure is easy to understand.
PROPERTY
Inspect node details
Review the key, type, path, child count, and value for the selected node.
SEARCH
Search with precision
Search keys, values, and paths, then narrow results with condition filters or basic JSONPath.
EDIT
Edit, format, and clean up
Use syntax highlighting for direct edits, formatting, minification, and find-and-replace.
I/O
Import and export
Export a selected node, import CSV as JSON, and write data as CSV, YAML, or XML.
Screenshots
Screenshots
The synchronized tree, graph, detail pane, and editor support JSON structure review, search, editing, and related tasks.
Each pane can be rearranged or detached as an independent window, making multi-monitor workflows easy.
Use Cases
Typical workflows
Find and correct data
Use the tree to locate an item, check its value in the details pane, edit it, and save.
Extract data from large files
Open huge files in Index Mode and export only the nodes you need as JSON or JSONL.
Convert CSV, YAML, and XML
Import CSV as JSON, then export edited data as CSV, YAML, or XML.
Edit selected parts of huge files
Collect edits in Index Mode and write a new complete file with the changes applied.
Narrow results with search rules
Filter nodes by keyword, key, value, path, conditions, or JSONPath, then step through the matches.
Use multiple monitors
Detach the tree, graph, details, editor, and search results into separate windows.
Download
Download
Download file
SHA256 hash
f170e071374cc7abf11c61914fd907acbf64517413759e5a104345af0386f796
License terms
You may use this software for personal, corporate, business, or commercial purposes.
For details, please see the License Agreement.
For details, please see the License Agreement.
Installation
Run the downloaded file and follow the on-screen instructions to install the application.
Details
Product information
Product name
GigaScope JSON Works
Supported files
JSON, GeoJSON, JSONL
Operating modes
Standard Mode (up to around 100 MB), Index Mode (100 MB and larger)
* Maximum readable size depends on available memory.
* In Index Mode, an index file roughly 3 to 6 times the source file size is created.
* Maximum readable size depends on available memory.
* In Index Mode, an index file roughly 3 to 6 times the source file size is created.
System requirements
Windows 10 / 11 64-bit （Linux and macOS versions coming soon）
Runtime
Runs as a standalone application. No additional runtime or framework is required.
Installation
Run the downloaded installer to install the application.
Import
Load CSV files as JSON arrays
Export
CSV, YAML, XML, and selected-node export as JSON/JSONL
Settings
Japanese / English, light theme / dark theme, shortcut settings
FAQ
Frequently asked questions
Which file formats are supported?
JSON, GeoJSON, and JSONL are supported. CSV files can also be imported and converted into JSON.
What is the difference between Standard Mode and Index Mode?
Standard Mode is for small and medium-sized files up to around 100 MB and supports full-document editing, full-document search, bulk replace, and saving the entire file. Index Mode is for huge files several GB in size; it uses an index file created during loading to read node information, then supports exploration, limited-scope editing, and export.
Can I edit the original file in Index Mode?
In Index Mode, the original file is basically left unchanged. The editor works on individual nodes. Edits are accumulated as operation history and applied when you save all data as a new file.
What should I know when working with huge files?
Use Index Mode for huge files. Index Mode scans the source file and creates an index file with the .gjsidx extension. Once created, the index is reused when the same file is loaded again. The index file is roughly 3 to 6 times larger than the source file and is accessed randomly, so fast storage with enough free space is required.
What search options are available?
Search supports keywords, key names, values, paths, condition filters, selectable result columns, and basic JSONPath. Regular expression matching and case-sensitive search can also be toggled.
Contact
Contact Us
Please use the form below for questions, bug reports, or other inquiries.
Contact by form
https://technohighway.co.jp
contactus@technohighway.co.jp
2-5-1 Azuma, Tsukuba-shi, Ibaraki 305-0031, Japan / +81-29-879-5401