---
title: "Convert JSON to TOML Online - Free Config Format Conversion"
description: "Convert JSON to TOML free with Enconvert. Transform JSON configuration into human-readable TOML for Rust, Go, and Python projects. No sign-up required. Developer API available."
canonical: "https://www.enconvert.com/convert/json-to-toml"
locale: "en"
endpoint: "json-to-toml"
---

# Convert JSON to TOML Online - Free Config Format Conversion

Convert JSON to TOML free with Enconvert. Transform JSON configuration into human-readable TOML for Rust, Go, and Python projects. No sign-up required. Developer API available.

## API

Do this conversion without a browser: `POST https://api.enconvert.com/v1/convert/json-to-toml` — Convert JSON files to TOML format

- Accepted input: .json

```bash
curl -X POST "https://api.enconvert.com/v1/convert/json-to-toml" \
  -H "X-API-Key: sk_YOUR_SECRET_KEY" \
  -F "file=@input_file" \
  -o output_file
```

Full reference: [EnConvert API documentation](https://www.enconvert.com/docs/introduction.md)

## How to convert

### 1. Upload Your JSON File

Click the upload area above or drag and drop your .json file. Enconvert accepts JSON configuration files up to 5 MB on the free tier. Your file is processed securely and deleted after conversion.

### 2. Convert JSON to TOML

Enconvert converts your JSON into a properly formatted TOML file with section headers, key-value pairs, and proper data typing. Processing takes seconds.

### 3. Download Your TOML File

Your converted TOML file is ready instantly. Click the download button to save it. Download links stay active for 1 hour on the free tier.

## Why Convert JSON to TOML?

TOML is a configuration file format designed to be easy for humans to read and write. Converting JSON configuration to TOML is common when migrating projects to ecosystems that prefer TOML.

**Human-readable configuration. **TOML uses clear section headers and key-value pairs without the curly braces and commas of JSON. Configuration files in TOML are easier to read, review, and manually edit — reducing the chance of syntax errors.

**Rust and Go ecosystem standard. **Cargo.toml is the package manifest for every Rust project. Go modules, Hugo static sites, and many Python tools (pyproject.toml via PEP 518) use TOML for configuration. Converting existing JSON configs to TOML is necessary when adopting these ecosystems.

**Comments support. **Unlike JSON, TOML supports inline comments. After converting, you can add explanatory comments to configuration values — making the config self-documenting for team members.

**When to keep JSON instead: **If the configuration is consumed programmatically by JavaScript applications, REST APIs, or systems that expect JSON, keep it as JSON. TOML is best for human-edited configuration files, not for data interchange between systems.

Enconvert converts JSON to TOML server-side with proper formatting. The free tier supports 100 conversions per month with no sign-up required.

## JSON vs TOML

| Feature | JSON | TOML |
| --- | --- | --- |
| Human Readability | Moderate (braces, commas, quotes) | High (clean section headers, minimal syntax) |
| Comments | Not supported | Supported (# inline comments) |
| Data Types | Strings, numbers, booleans, null, arrays, objects | Strings, integers, floats, booleans, dates, arrays, tables |
| Date/Time Support | Strings only | Native date, time, and datetime types |
| Nesting | Unlimited via nested objects | Tables and inline tables |
| Ecosystem | JavaScript, REST APIs, web | Rust (Cargo), Go, Python (pyproject), Hugo |
| Trailing Commas | Not allowed (strict syntax) | Not applicable (no commas) |
| Best For | APIs, data interchange, JavaScript | Configuration files, human-edited settings |

## FAQ

### Does TOML support all JSON data types?

TOML supports strings, integers, floats, booleans, arrays, and tables (objects). It also adds native date, time, and datetime types that JSON lacks. The one limitation is that TOML does not have a null type — JSON null values are omitted or converted to empty strings during conversion.

### Is the TOML output properly formatted?

Yes. The output uses standard TOML formatting with clear section headers (\[section\]), proper indentation, and correctly typed values. The file is ready for use as a configuration file in any TOML-compatible tool.

### What tools use TOML configuration?

Common tools that use TOML include Rust (Cargo.toml), Python (pyproject.toml), Hugo (config.toml), GitLab CI (.gitlab-ci.toml), and many Go applications. The format is increasingly popular for project configuration due to its readability.

### Is there a file size limit?

The free tier accepts JSON files up to 5 MB with 100 conversions per month — no sign-up or credit card required. The Starter plan ($19/mo) supports 2,000 conversions with 15 MB file limits, the Pro plan ($49/mo) supports 10,000 conversions with 50 MB limits, and the Business plan ($149/mo) supports 50,000 conversions with 150 MB limits.

### Can I automate JSON to TOML conversion?

Yes. The Enconvert API supports programmatic conversion. Send JSON files via the REST API and receive TOML output. Integration examples are available in Python, JavaScript, and cURL.

## Related conversions

- [Convert TOML to JSON Online - Free Config Format Conversion](https://www.enconvert.com/convert/toml-to-json.md)
- [Convert JSON to YAML Online - Free Config Format Conversion](https://www.enconvert.com/convert/json-to-yaml.md)
- [Convert JSON to CSV Online - Free Data Export](https://www.enconvert.com/convert/json-to-csv.md)
- [Convert JSON to XML Online - Free Data Format Conversion](https://www.enconvert.com/convert/json-to-xml.md)
- [Convert YAML to JSON Online - Free Config Format Conversion](https://www.enconvert.com/convert/yaml-to-json.md)