Convert JSONC to JSON Online Free

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Converts to JSON in your browser · first daily conversion free · no signup

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Convert your JSONC files to JSON format instantly in your browser. Free, no signup, no limits.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

ChangeThisFile converts JSONC to JSON instantly in your browser. Drop your JSONC file, get a JSON file in seconds. Free, no signup. Your files never leave your device.

First daily conversion free No signup required Files stay on your device Instant conversion Updated May 2026

JSONC vs JSON: Format Comparison

Key differences between the two formats

Feature	JSONC	JSON
Comments	✓ Single-line // and multi-line /* */	✗ Not supported
Trailing Commas	✓ Allowed in objects and arrays	✗ Syntax error
File Size	Larger (with comments)	Smaller (no comments)
Use Cases	Config files, VS Code settings	APIs, data exchange, production
Browser Support	✗ Not natively supported	✓ Universal support

When to Convert

Common scenarios where this conversion is useful

VS Code Settings and Configuration

Convert VS Code settings.json, launch.json, and tasks.json files from JSONC to JSON for automated deployments or when sharing configuration files that need to work across different editors that don't support JSONC comments.

TypeScript Configuration Files

Transform tsconfig.json files with inline comments explaining compiler options into clean JSON format for build systems, CI/CD pipelines, or tools that require standard JSON without comment syntax.

API Documentation with Inline Comments

Convert JSONC API schemas, OpenAPI specifications, or configuration templates with developer comments into production-ready JSON files for deployment to servers or integration with tools that require strict JSON compliance.

Who Uses This Conversion

Tailored guidance for different workflows

Developers

Convert JSONC config files to JSON for compatibility with different tools or frameworks
Transform JSONC API responses to JSON for debugging, logging, or documentation

Validate the converted JSON output with a linter to catch any structural issues from the conversion

Watch for data type coercion (e.g., numbers becoming strings) when converting between JSONC and JSON

Data Analysts

Convert JSONC exports to JSON for importing into spreadsheet software, databases, or BI tools
Transform JSONC datasets to JSON for sharing with teammates who use different analysis tools

Check that column delimiters and quote escaping are handled correctly in the converted JSON file

Preview the first few rows of the JSON output to verify headers and data alignment

System Administrators

Convert JSONC configuration to JSON when migrating between infrastructure tools or platforms
Transform JSONC log exports to JSON for ingesting into monitoring or analysis systems

Back up the original JSONC config before converting, especially for production systems

Test the converted JSON in a staging environment before deploying to production

How to Convert JSONC to JSON

1

Upload your JSONC file

Drag and drop your JSONC file onto the converter, or click to select it from your device.
2

Convert

Your file is converted in your browser. Your files never leave your device.
3

Download your JSON

Click download to save your converted JSON file.

Automate this conversion

Convert JSONC to JSON via API

Integrate this conversion into your pipeline with 3 lines of code. Free tier: 25 conversions/month.

The free converter above runs entirely in your browser — your file is never uploaded. This optional API is a separate server-side endpoint for automating conversions at scale.

curl -X POST https://changethisfile.com/v1/convert \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "file=@input.jsonc" \
  -F "target=json" \
  -o output.json --fail

const form = new FormData();
form.append('file', fileInput.files[0]);
form.append('target', 'json');

const res = await fetch('https://changethisfile.com/v1/convert', {
  method: 'POST',
  headers: { 'Authorization': 'Bearer YOUR_API_KEY' },
  body: form
});
const blob = await res.blob(); // your converted JSON file

Replace YOUR_API_KEY with your free key — no credit card needed.

Get a free API key

Frequently Asked Questions

Is my file uploaded to a server?

No. The conversion happens entirely in your browser. Your file never leaves your device.

Is this free?

Yes. ChangeThisFile is completely free with no limits on conversions.

What is JSONC and how is it different from JSON?

JSONC (JSON with Comments) is an extension of JSON that allows single-line (//) and multi-line (/* */) comments, plus trailing commas. It's commonly used in VS Code settings, TypeScript configurations, and other developer tools where comments help explain configuration options.

Why would I need to convert JSONC to JSON?

JSONC files need conversion to JSON for production environments, APIs, or tools that require strict JSON compliance. Many servers, databases, and web browsers don't support JSONC syntax and will throw parsing errors if comments are present.

Does this converter preserve the data structure?

Yes, the conversion only removes comments and trailing commas while preserving the exact data structure, key names, values, and nesting. Your configuration data remains identical after conversion.

Can I convert VS Code settings.json files?

Absolutely. VS Code uses JSONC format for settings.json, launch.json, and tasks.json files. Converting these to JSON is useful for automation, deployment scripts, or sharing configurations with tools that don't support JSONC.

Will my TypeScript tsconfig.json work after conversion?

Yes, TypeScript compiler accepts both JSONC and JSON formats for tsconfig.json. Converting removes helpful comments but maintains all compiler options and configurations exactly as specified.

What happens to trailing commas during conversion?

Trailing commas are automatically removed during JSONC to JSON conversion. This ensures the output is valid JSON that won't cause syntax errors in strict JSON parsers.

Can I batch convert multiple JSONC files?

Currently, the converter handles one file at a time. For batch conversion of multiple JSONC files, you'll need to convert each file individually through the web interface.

Is the converted JSON minified or formatted?

The converter preserves the original formatting and indentation of your JSONC file, only removing comments and trailing commas. The resulting JSON maintains the same readable structure.

Compare JSONC vs JSON

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