FREE LOCAL FILE TOOLS
JSON Viewer
Inspect JSON source, expandable trees and record arrays locally. Preserve large integers and decimal spelling with a free, read-only browser viewer.
JSON represents objects, arrays and scalar values in API responses, configuration files and data exports. This JSON viewer helps you follow nested structure while keeping the original source available for comparison.
Drop a file here
Data, documents, ebooks, images, maps or 3D models.
Your files stay on your device.
How to use the JSON Viewer
Open a .json file and switch between source and tree views. Search source lines or browse arrays of records as a table. Lossless numeric parsing preserves large integer values and decimal spelling rather than rounding them to ordinary JavaScript numbers.
What the JSON Viewer supports
Read the source, expand a tree, search source lines or explore arrays of records as a table. Download the original bytes at any time.
File limits and compatibility
20 MiB input; bounded tree and source preview. Large integers and decimal spelling are preserved. No editing or format conversion.
Expanded content can reach browser limits before the input limit. If opening fails, try a smaller supported file. No cloud fallback is used. This viewer is free and requires no account.
JSON Viewer FAQ
Will large JSON numbers be rounded?
The viewer uses lossless numeric parsing to preserve large integers and decimal spelling. Download the original file when you need the authoritative original bytes.
Can I edit or convert JSON here?
No. This is a read-only JSON viewer with source, tree and record-table views, not an editor or format converter.
Can I open a large JSON file?
JSON input is limited to 20 MiB. Tree and source previews are bounded, and deeply nested or expanded content may reach browser memory limits earlier.
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