Before
{"events":[{"type":"login","user":"ada"},{"type":"purchase","user":"ada"}],"meta":{"count":2}}
What this tool does
The large JSON viewer focuses on making long responses and nested structures readable without sending files anywhere.
Common use cases
- Inspecting big API responses from pagination-heavy endpoints.
- Reviewing exported data files before conversion or import.
- Debugging nested logs or observability payloads.
- Loading local JSON files that are hard to read in a basic text editor.
Before and after example
After
{
"events": [
{"type": "login", "user": "ada"},
{"type": "purchase", "user": "ada"}
],
"meta": {
"count": 2
}
}
Common JSON errors related to large payloads
- Minified one-line JSON can hide missing commas or brackets.
- Partial copies from logs often cut off the closing structure.
- Embedded escaped JSON may need separate decoding first.
- Huge nested arrays are difficult to inspect until formatted.
How to use the tool
- Paste a large JSON response or upload a local file.
- Click View Formatted JSON to expand the structure.
- Validate the content if formatting fails.
- Copy, download, or move to JSON Minifier when you need a smaller version again.
Privacy note: Runs locally in your browser. Your JSON is not uploaded.
Related JSON tools
FAQ
Can I use this as a JSON file viewer?
Yes. Upload a local file and inspect it in your browser with formatting and validation tools.
Is there a size limit?
The practical limit depends on your browser and device memory, but the tool keeps processing local instead of sending data to a server.
Can I edit the large JSON after opening it?
Yes. The editor stays writable, so you can clean up or reformat the payload while reviewing it.
What if the file is invalid JSON?
Use the validator or move to Fix Invalid JSON to repair the syntax first.