Convert HJSON to JSON Online Free

Drag & drop your .hjson file here, or click to browse

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

Your first conversion each day is free. A $2.99 one-time Day Pass unlocks 24 hours and ends by itself.

Transform Human JSON (HJSON) with comments and relaxed syntax into standard JSON format instantly in your browser. No server upload, no signup, no limits.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

ChangeThisFile converts your Human JSON (HJSON) files to standard JSON format directly in your browser. HJSON's relaxed syntax with comments, unquoted keys, and multiline strings makes config files human-friendly, but APIs need standard JSON. Your data stays on your device for complete privacy. Free, instant, no signup.

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

HJSON vs JSON: Format Comparison

Key differences between the two formats

Feature	HJSON	JSON
Comments	Supported with // and /* */ syntax	Not supported
Unquoted keys	Allowed for simple keys	All keys must be quoted
Trailing commas	Allowed and ignored	Syntax error
Multiline strings	Supported with triple quotes	Requires escape sequences
Quoteless strings	Simple strings don't need quotes	All strings must be quoted
API compatibility	Requires conversion for most APIs	Universal API support
Human readability	Very high, designed for humans	Good for machines, harder for humans

When to Convert

Common scenarios where this conversion is useful

API integration and data exchange

Convert HJSON configuration files to JSON format for REST APIs, GraphQL queries, or any service that expects standard JSON input.

Config file standardization

Transform human-friendly HJSON config files into standard JSON for deployment to production environments or CI/CD pipelines that require strict JSON.

Tool migration and compatibility

Convert HJSON files when migrating between tools or frameworks that have different format requirements, ensuring compatibility across your tech stack.

Development workflow optimization

Keep development configs in readable HJSON format with comments and relaxed syntax, then convert to JSON for production deployment or tool consumption.

Who Uses This Conversion

Tailored guidance for different workflows

Developers

Convert HJSON config files to JSON for compatibility with different tools or frameworks
Transform HJSON 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 HJSON and JSON

Data Analysts

Convert HJSON exports to JSON for importing into spreadsheet software, databases, or BI tools
Transform HJSON 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 HJSON configuration to JSON when migrating between infrastructure tools or platforms
Transform HJSON log exports to JSON for ingesting into monitoring or analysis systems

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

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

How to Convert HJSON to JSON

1

Upload your HJSON file

Drag and drop your .hjson file onto the converter, or click to browse your files. Files with comments, unquoted keys, and relaxed syntax are fully supported.
2

Automatic conversion

Your HJSON is parsed and converted to valid JSON instantly in your browser. Comments are stripped and syntax is standardized. No data is sent to any server.
3

Download the JSON result

Click Download to save your converted .json file. The output is properly formatted with standard JSON syntax and proper indentation.

Automate this conversion

Convert HJSON 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.hjson" \
  -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 the HJSON to JSON conversion lossless for data?

Yes for data values. All HJSON data types (strings, numbers, booleans, arrays, objects) convert perfectly to JSON. However, comments and formatting are removed since standard JSON doesn't support them.

What HJSON features are supported?

All standard HJSON features: comments (// and /* */), unquoted keys, quoteless strings, trailing commas, multiline strings with triple quotes, and relaxed syntax rules.

Are my files uploaded to a server?

No. The entire conversion happens in your browser using JavaScript. Your HJSON configuration data never leaves your device, making it safe for sensitive config files.

Can I convert HJSON with nested objects?

Yes. Deeply nested objects and arrays are converted to properly formatted JSON with correct nesting. There is no depth limit for the conversion.

What happens to comments in the HJSON file?

Comments are stripped during conversion since standard JSON doesn't support comments. If you need to preserve comments, consider converting to JSONC or documenting them separately.

How are multiline strings converted?

HJSON multiline strings (using triple quotes) are converted to standard JSON strings with proper escape sequences (\n for newlines).

Does the converter handle unquoted keys and values?

Yes. Unquoted keys and quoteless strings in HJSON are automatically quoted in the JSON output to comply with JSON specification.

Can I convert large HJSON configuration files?

Yes. Since the conversion runs in your browser, file size is limited only by your device's available memory. Large configuration files work well on modern devices.

Is the JSON output valid for APIs?

Yes. The converted JSON follows the strict JSON specification and is compatible with all APIs, databases, and tools that expect standard JSON format.

Is this free to use?

Yes, completely free with no limits on file size or number of conversions. No account required.

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