Paste a JSON array
[ ] or object { }
Ready to split
Paste JSON and set chunk size, then click Split// break large json into smaller chunks instantly
Split large JSON arrays or objects into smaller chunks for debugging, export, or pagination. Free browser-based tool, no upload required.
[ ] or object { }
Ready to split
Paste JSON and set chunk size, then click SplitPaste your large JSON array or object into the input field.
Enter how many items each chunk should contain.
Click Split JSON, preview each chunk, then copy or download.
JSON Splitter breaks a large JSON array or object into equally-sized chunks. Each chunk is valid JSON you can copy, download, or send to an API. Works entirely in the browser — your data never leaves your device.
JSON Splitter supports both JSON arrays [ ] and JSON objects { }. Arrays are split by item count; objects are split by key count.
No. All processing happens in your browser using JavaScript. Your JSON data never leaves your machine, making it safe for sensitive or private data.
The tool will display a clear error message explaining what went wrong. Fix the syntax error and try again.
Yes. Click the "Download All" button to download each chunk as a separate numbered .json file.
There is no hard limit — the tool is constrained only by your browser's available memory. For very large files (100 MB+), consider splitting offline.
You can set any chunk size from 1 to 10,000 items. For very large JSON arrays, a chunk size of 100–500 is a good starting point for API imports.
A JSON Splitter is a developer utility that takes a large JSON array or object and breaks it into smaller, equally-sized chunks. Each chunk is a fully valid, self-contained JSON document that can be independently used, processed, or transmitted.
Modern web APIs, databases, and data pipelines frequently impose limits on payload sizes. Whether you're hitting a REST API that accepts at most 100 records per request, importing data into a CMS, or debugging a massive dataset, splitting JSON into manageable pieces is a common and necessary task.
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There are several common scenarios where splitting JSON is the right approach:
The tool uses the browser's native JSON.parse() and JSON.stringify() APIs for parsing and output. No external libraries are required. Here is what happens under the hood:
[ ]) or a JSON object ({ }).array_chunk logic to divide items by your chosen chunk size..json files.Understanding the difference between these two structures helps you use the splitter more effectively:
A JSON array is an ordered list of values enclosed in square brackets: [1, 2, 3]. Arrays are the most common input for splitting, since they represent homogeneous records like users, products, or transactions. Splitting an array of 1,000 user records into chunks of 100 produces ten valid arrays, each with 100 users.
A JSON object is an unordered set of key-value pairs enclosed in curly braces: {"name": "Alice", "age": 30}. Objects can also be split by key count — for example, splitting a configuration object with 200 keys into groups of 50 keys each.
Choosing the right chunk size matters. Here are guidelines based on common use cases:
If your JSON array contains nested objects or arrays, each top-level item is kept intact during splitting. The splitter never modifies, flattens, or restructures nested data — it only divides the top-level array or object. This guarantees that every chunk is structurally identical to what you would expect from the original data schema.
For extremely large files (hundreds of megabytes or gigabytes), a browser-based tool may not be practical. In those cases, command-line tools like jq are a good option. The jq command supports slicing arrays natively, and can handle streaming JSON input. However, for files up to tens of megabytes, this browser tool handles the job cleanly without any installation.
JSON Splitter is entirely client-side. Your data is parsed and processed in your browser's JavaScript engine and is never transmitted to any server. This makes it safe to use with proprietary data, customer records, API responses containing secrets, or any other sensitive information. You can confirm this by checking the browser's network tab — no requests are made when you click Split.