JSON Editor
Edit, validate, format, and minify JSON online in your browser. Paste or open a JSON file, make changes in a syntax-highlighted editor, and copy or download the result without an account.
Key Features
Syntax-Aware Editing
Edit JSON with syntax highlighting for property names, strings, numbers, booleans, null, arrays, and objects. The editor makes structured data easier to scan without changing its meaning.
Live Syntax Validation
Check JSON syntax while editing and identify common problems such as missing commas, unmatched brackets, invalid quotation marks, and malformed values. Syntax validation does not validate a JSON Schema.
Readable Value Hints
Recognize selected value patterns such as URLs or email-like strings when supported by the interface. These hints are visual conveniences and are not a substitute for runtime or schema validation.
Copy Node Path & Value
Right-click any node in the tree view to copy its JSONPath (e.g. $.users[0].name), the raw value, the full node, or the parent path. Each leaf also shows its JSON type and array index so you can locate fields without expanding everything.
Copy and Download
Copy the edited JSON to your clipboard or download it as a .json file for configuration, API testing, documentation, fixtures, and local development.
Format and Minify
Beautify valid JSON with two-space or four-space indentation, or remove unnecessary whitespace to create a compact representation for transport or storage.
Paste or Open JSON
Paste JSON from an API response, configuration file, database export, or code project, or open a local .json file if file input is available.
Browser-Based Editing
Editing, parsing, validation, formatting, and minification happen in your browser. The page does not require an account or upload your JSON to a remote service.
Search & Jump to Node
Search the tree by key, value, path, all scopes, or a JSONPath expression. Open the results list to see every match with its path, value type, and parent array, then jump straight to the node in the tree. Export the matches as .txt, .json or .csv, and reuse one of your recent searches from the search history.
Edit JSON in the Tree
Edit JSON directly in the tree view: add or delete fields, rename keys, change a value's type, add, remove, or reorder array items, and copy or move nodes. Select several nodes to set the same value in one step, undo or redo any change, and every edit is validated immediately in your browser.
Media and Value Previews
Inspect string values that look like images, audio, video, PDFs, colors, timestamps, JWTs, Base64, UUIDs, IP addresses, Markdown, or regular expressions. Audio, video and PDF previews load only after you ask for them, large Base64 payloads decode on demand, and remote resources are flagged as third-party requests.
Smart Value Detection
String values that look like timestamps, JWTs, Base64, URLs, colors, emails, UUIDs, IP addresses, Markdown, or regular expressions are labelled with a type chip and one-click actions: open or copy a link, start an email, decode a JWT or Base64 payload, and read a timestamp as local time, UTC, or ISO. Markdown values are previewed as rendered HTML that is sanitized in your browser.
JSONPath Query
Query the document with a basic JSONPath subset: property access, array indexes, the * wildcard, recursive descent ($..key), and simple [?(@.field=="value")] filters. Results list every match with its path and value and jump straight to the node. This is a partial subset, not a fully JSONPath-compliant engine — slices, unions and script expressions are not supported.
Clipboard Workflow
Pasted JSON is formatted automatically, and pasted text that looks like a URL or Base64 is flagged rather than silently rewritten. Copy the document as formatted or minified JSON, copy any tree node, or replace a node with whatever is currently on your clipboard.
Array Table View
Turn any object array into a sortable table. Hide or resize columns, filter rows by text, copy a selected row or its JSONPath, and export the full array as CSV — all in your browser.
How to Use
Paste or open JSON
Enter a JSON object, array, scalar value, or local .json file in the editor. The input must use standard JSON syntax before it can be formatted or exported.
Edit the structure
Change values, add or remove properties, update array items, or modify nested objects. Syntax highlighting and the highlighted error line help you navigate the document.
Validate and format
Run validation to check syntax, then choose two-space, four-space, or minified output. Fix any reported error before copying or downloading the result.
Copy or download
Copy the valid JSON to another application or download it as a .json file. Keep a backup of the original file before replacing it.
JSON Editing Example
Format and edit a minified JSON document, then export the readable result.
{"name":"Alice","age":30,"skills":["JavaScript","TypeScript","Vue"],"address":{"city":"Shanghai","country":"CN"}}The input is valid JSON, but its compact layout makes individual properties and nested values harder to inspect.
{
"name": "Alice",
"age": 30,
"skills": [
"JavaScript",
"TypeScript",
"Vue"
],
"address": {
"city": "Shanghai",
"country": "CN"
}
}The formatted result preserves the JSON data while adding indentation and line breaks. You can edit values, add properties, remove fields, or download the updated file.
How to Edit JSON Online
What Is an Online JSON Editor?
An online JSON editor is a browser-based workspace for writing, changing, formatting, and validating JSON. It is useful for API responses, configuration files, test fixtures, database exports, and small structured documents.
Unlike a basic text box, a syntax-aware editor can highlight JSON tokens, report syntax errors with a line and column, and format valid data. It does not automatically know the business rules or schema required by the application that will consume the JSON.
How to Edit JSON Online
- Enter JSON: Paste a JSON document or open a local .json file.
- Inspect the structure: Use indentation, syntax highlighting, and the highlighted error line to locate objects, arrays, keys, and values.
- Make changes: Edit strings, numbers, booleans, null values, object properties, or array items.
- Validate the syntax: Run validation or review the live status to find missing commas, unmatched brackets, invalid quotes, and other syntax errors.
- Format or minify: Choose readable indentation for editing or minified output for compact transport.
- Export: Copy the valid result or download a new JSON file.
JSON Syntax Rules to Remember
- Double quotes: Property names and string values use double quotation marks.
- Commas: Properties and array items are separated by commas, but the final item normally has no trailing comma.
- Objects: Use curly braces and key-value pairs.
- Arrays: Use square brackets and ordered values.
- Primitive values: Valid JSON supports strings, numbers, booleans, and null.
- No comments: Standard JSON does not allow comments. JSONC or JSON5 require a different parser.
Editor vs Formatter vs Validator
- JSON editor: Lets you change keys, values, arrays, and nested objects.
- JSON formatter: Adds indentation and line breaks to an existing valid document.
- JSON validator: Checks whether the text follows JSON syntax.
- JSON Schema validator: Checks whether parsed data satisfies a separate structure and constraint definition.
- JSON minifier: Removes unnecessary whitespace for a compact representation.
Many tools combine these capabilities, but they answer different questions. A document can be valid JSON and still fail a JSON Schema or application-specific validation.
Formatting and Minifying JSON
Formatting makes nested objects and arrays easier to read. Minifying removes whitespace without changing the parsed values. Keep formatted JSON during development and review, and use minified output only when compact transport or storage is useful.
Object Key Order
This editor keeps object keys in the order they appear in your document and does not reorder them. When you need a normalized order before comparing two documents, use a comparison tool with an explicit sort-keys option, and remember that reordering keys can make a diff noisy if a project intentionally preserves a particular presentation order.
Editing Configuration Files Safely
Before editing a configuration file, create a backup and understand how the consuming application interprets values. A value such as "false" is a string, while false is a boolean. Similarly, a numeric-looking identifier may need to remain a string if leading zeros or exact formatting matter.
After editing, validate the JSON syntax and test the configuration in a safe environment. Valid JSON does not guarantee that the application accepts the field names, types, or values.
Editing API Responses and Test Fixtures
An editor can help prepare mock API data, remove fields from a response, or change values for a test case. For reliable fixtures, preserve the expected data types and validate the result against the API schema or runtime parser used by the application.
Large JSON Files
Browser editors usually need to hold the input text and parsed or highlighted representation in memory. Syntax highlighting, validation, formatting, and rendering can become expensive for large files. For very large JSON documents, use a local editor, a streaming parser, or a tool designed for large-file inspection.
Browser-Based Privacy
This editor is designed to process JSON in the browser rather than sending it to a remote service. That can be useful for private development data, but it is not a secret-management system. Avoid entering passwords, access tokens, private keys, customer data, or confidential production configuration into any online editor.
The optional Share button is the one action that leaves the page: it compresses your document and encodes it into the link itself as a URL fragment. No server receives the JSON, but the link is a copy of your data — anyone who opens it can decode it, and it may be stored in browser history or chat logs. Documents that would make the link too long are refused and offered as a download instead.
Advanced Editing Workflows
Structured data users may need tree, table, grid, form, query, repair, schema validation, or graph views in addition to a text editor. Those views can be useful for large or unfamiliar documents, but they are separate capabilities and should be clearly distinguished from standard syntax editing.
One Page for Editing, Formatting and Validating
People usually arrive looking for one of three tools: an online JSON editor to change values, an online JSON formatter to make a document readable, or an online JSON validator to confirm the text is valid. This page is a free JSON editor with validation built in that also does the other two jobs, so you can paste once and move between them instead of copying text into another site.
As an editor, it lets you edit JSON online with syntax highlighting, a tree view, and search. As a formatter, it can format JSON online or pretty print JSON with two or four spaces — the same job some tools call a JSON beautifier. As a validator, it can validate JSON online and report the failing line and column. It also works as a JSON file editor: open a local .json file instead of pasting. Used together, that is one JSON formatter and validator plus an editor on the same input.
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