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Convert JSON to YAML, automatically fix common JSON syntax errors, validate JSON structure, and export clean YAML output.
Top-Level Items
0
Output Lines
0
Input Size
0 B
Output Size
0 B
Drop a JSON file here
or use the upload button inside the JSON editor.
What can be fixed?
Fixes trailing commas, smart quotes, comments, single quotes, unquoted keys, duplicate commas, JavaScript object wrappers, and common safe bracket issues.
JSON Input
YAML Output
This converter parses valid JSON, preserves structured data, and writes readable YAML using browser-side processing.
Input JSON example:
{
"service": {
"name": "jsonkit-api",
"version": "1.0.0",
"enabled": true,
"ports": [3000, 3001],
"database": {
"host": "localhost",
"port": 5432,
"ssl": false
},
"features": {
"logging": true,
"cache": null
}
}
}Output YAML example:
service:
name: jsonkit-api
version: 1.0.0
enabled: true
ports:
- 3000
- 3001
database:
host: localhost
port: 5432
ssl: false
features:
logging: true
cache: null| Feature | Explanation |
|---|---|
| Nested Objects | JSON objects are converted into indented YAML mappings. |
| Arrays | JSON arrays are written as YAML sequences. |
| Scalars | Strings, numbers, booleans, and null values are preserved. |
| Beautified Output | Generated YAML is formatted for readability. |
The converter now includes an advanced JSON Repair engine that helps identify, explain, and automatically fix common JSON formatting problems before conversion. It shows what can be repaired, gives a clear repair result, displays issue count and severity, lists exact fixes, includes a Before vs After Repair Preview, and lets users copy or download the repaired JSON.
When JSON repair is successful, the tool displays both the original JSON and the repaired JSON side by side. Developers can review the changes, verify the structure, copy the repaired JSON, download it, or convert it immediately to YAML.
Before Repair
{
name: "John",
age: 30,
}After Repair
{
"name": "John",
"age": 30
}Invalid JSON often comes from JavaScript-style objects, pasted config snippets, trailing commas, comments, duplicate commas, malformed arrays, missing brackets, or smart quotes copied from documents. This repair helper safely fixes common syntax issues before converting JSON to YAML.
Before
{ name: "John" }After
{ "name": "John" }Before
{ "name": "John", }After
{ "name": "John" }Before
{ 'name': 'John' }After
{ "name": "John" }Before
{ "name": "John" // user name
}After
{ "name": "John" }Before
{ "name": "John",, "role": "developer" }After
{ "name": "John", "role": "developer" }Before
{
"ports": [
3000,
3001
"database": { "ssl": false }
}After
{
"ports": [
3000,
3001
],
"database": { "ssl": false }
}Many JSON files fail to convert because of syntax errors such as missing quotes around property names, single quotes instead of double quotes, trailing commas, duplicate commas, missing closing braces, missing closing brackets, JavaScript comments, and malformed arrays. The built-in JSON Repair feature automatically detects and fixes many common JSON formatting issues before conversion.
Use this page as a JSON to YAML converter, fix invalid JSON tool, JSON syntax checker, malformed JSON repair helper, and JSON parser error fixer for configuration files, API payloads, and developer workflows.
Before converting to YAML, the repair tool can turn JavaScript-style object syntax into valid JSON.
Before Repair
{
name: "John",
age: 30,
}After Repair
{
"name": "John",
"age": 30
}Yes. It is free to use and converts JSON to YAML directly in your browser.
No. JSON parsing, JSON repair, and YAML generation happen client-side in your browser.
Yes. Arrays, nested objects, strings, numbers, booleans, and null values are supported.
Yes. You can copy the generated YAML or download it as a .yaml file.
Yes. The built-in JSON repair engine can fix common syntax issues such as trailing commas, missing quotes around keys, single quotes, smart quotes, comments, duplicate commas, and safe missing braces or brackets.
Yes. The tool attempts automatic repair before converting JSON to YAML. You can review the original and repaired JSON before using the output.
It can fix missing quotes, trailing commas, duplicate commas, smart quotes, JavaScript comments, single quotes, unbalanced brackets, and several common formatting mistakes.