Move between config formats
Convert JSON samples into YAML config, or convert YAML into JSON for easier handling in code.
JSON ↔ YAML Converter
🔒 Browser-side processing
Convert JSON and YAML while moving structured data between formats.
Guide
JSON and YAML conversion review
Move structured data such as API responses, config files, and manifests between JSON, YAML, and simple CSV output.
Inspect structure
Check whether arrays, objects, strings, numbers, booleans, and null values survive conversion as intended.
Flatten simple arrays
Turn simple array data into CSV when you need a quick spreadsheet or review table.
More: how to use it, examples, and common errors
Workflow
How to use it
- Paste the source JSON or YAML.
- Choose the conversion direction and review the output structure.
- Check string numbers, true/false values, and null values for type changes.
- Use CSV output mainly for shallow array data.
Examples
Real input and output
JSON to YAML
Input
{"name":"api","port":8080,"debug":false}Output
name: api
port: 8080
debug: falseNested structures
Input
{"db":{"host":"localhost","ports":[5432,5433]}}Output
db:
host: localhost
ports:
- 5432
- 5433Troubleshooting
Errors you will hit
Unquoted "no" turns into false
YAML 1.1 reads no, yes, on, and off as booleans. The country code NO becoming false is known as the Norway problem. Quote the value to keep it a string.
Indentation breaks
YAML does not accept tabs for indentation. Use spaces and keep the width consistent across the file.
Leading zeros disappear
Values like 08 or a phone number can be parsed as octal or numeric. Quote phone numbers, postal codes, and version strings.
Review
Things to check
YAML infers types
YAML can interpret values that look like yes, no, or dates. Quote sensitive string values when exact text matters.
Comments may not survive
JSON has no comments, and YAML comments or original formatting may be lost during conversion. Keep the original config separately.
Related
Tools that pair well
- UUID Converter
- Base64 Encoder/Decoder
- JSON Formatter
- JWT Decoder
- URL Encoder/Decoder
- URL Query Builder — Encode key-value pairs safely for search URLs, share links, and API test query strings.