Convert Human JSON to YAML Online Free
Convert a Human JSON config into clean YAML for tooling that prefers YAML or for editorial review.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts Human JSON (.hjson) configuration files to YAML on a secure server. Upload your .hjson file and we parse comments, unquoted keys, and multi-line strings, emitting equivalent canonical YAML. Files are auto-deleted after conversion. Free, no signup.
Convert Human JSON to YAML
Drop your Human JSON file here to convert it instantly
Drag & drop your .hjson file here, or click to browse
Convert to YAML instantly
Human JSON vs YAML: Format Comparison
Key differences between the two formats
| Feature | Human JSON | YAML |
|---|---|---|
| Syntax | JSON-with-comments and lenient parsing | Indentation-based, supports comments via # |
| Comments | Both // and /* */ supported | # style comments |
| Strings | Quoted, unquoted, or multi-line via triple quotes | Bare strings, quoted, or pipe (|) / folded (>) for multi-line |
| Trailing commas | Allowed | Not used — YAML uses indentation instead |
| Tooling | Hjson parsers in many languages | Universal — YAML 1.2 parsers everywhere |
| Best for | Hand-edited config with comments | Pipelines and tools that prefer YAML |
When to Convert
Common scenarios where this conversion is useful
Migrate from Hjson to YAML configs
If your project standardizes on YAML for configuration, convert existing Hjson files in one pass to switch over without losing any comments or values.
Feed Hjson into YAML-only tools
Some CI systems and config consumers expect YAML. Convert Hjson sources at build time so the original format stays human-friendly.
Generate YAML for documentation
If your app reads Hjson but your docs need YAML examples, convert once and embed the YAML directly in the documentation.
Standardize across a polyglot stack
Some services prefer Hjson, others YAML. Convert at the boundary so each consumer sees its preferred format without the source author having to maintain both.
Who Uses This Conversion
Tailored guidance for different workflows
For Backend Developers
- Migrate a project from Hjson configs to YAML
- Bridge Hjson sources to YAML-only tools
- Generate YAML examples for documentation from Hjson sources
For Platform Teams
- Standardize on YAML across a polyglot stack
- Convert Hjson at the build boundary for downstream consumers
- Maintain backwards compatibility while migrating config formats
How to Convert Human JSON to YAML
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1
Upload your Human JSON file
Drag and drop your Human JSON file onto the converter, or click browse. The file is uploaded over an encrypted connection.
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2
Server-side conversion
The server converts your Human JSON to YAML on our secure backend. This typically takes a few seconds.
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3
Download the YAML
Save your converted YAML file. The server copy is automatically deleted after processing.
Frequently Asked Questions
Comments are preserved when possible. // and /* */ from Hjson are converted to # style comments in the YAML output.
Yes — Hjson triple-quoted multi-line strings are converted to YAML's pipe (|) or folded (>) scalar syntax automatically.
The output uses YAML 1.2 grammar, which is widely supported. Tooling stuck on YAML 1.1 may interpret some scalars (Norway problem, octal numbers) differently.
Trailing commas are valid in Hjson but not used in YAML. They are silently removed during conversion since YAML uses indentation rather than separators.
No — only Hjson grammar is checked during parsing. Application-specific validation (required fields, types) needs to happen in the consuming tool.
Yes — use ChangeThisFile's YAML to JSON converter and then JSON to Hjson is a trivial one-pass for which we offer a separate page.
Yes — conversion runs on our backend over HTTPS. The file is auto-deleted after processing.
Hjson allows both quoted and unquoted keys. The YAML output uses unquoted keys when YAML grammar allows, otherwise quotes for safety.
Up to 50MB, far larger than any realistic config file.
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