JSON مقابل YAML: الفروق ومتى تستخدم كل منهما
Quick Answer
YAML يدعم التعليقات (#)، المراجع، والبنى بدون أقواس — أسهل للتكوين. JSON صارم وأسرع — أفضل لواجهات برمجة التطبيقات. استخدم محول JSON YAML المجاني للتحويل الثنائي في متصفحك.
Introduction
YAML هو superset من JSON يدعم التعليقات والمراجع anchors والبنى البشرية بدون أقواس. JSON أكثر صرامة وأسرع في التحليل. YAML شائع في ملفات التكوين (Docker Compose، CI/CD) بينما JSON شائع في واجهات برمجة التطبيقات وتبادل البيانات.
Step by Step
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Compare syntax and readability
JSON uses braces and quotes: {"key": "value"}. YAML uses indentation and colons: key: value. YAML is cleaner for configuration — no quotes needed for strings, no commas between items, no braces. JSON is more explicit and less error-prone for data interchange.
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Compare features
YAML supports: comments (#), multiline strings (|, >), anchors (&) and aliases (*), multiple documents in one file (---), and complex types. JSON supports none of these — no comments, no multiline strings, no references. JSON's simplicity is intentional: it's a data interchange format, not a configuration language.
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Compare safety and parsing
JSON parsing is fast and safe — JSON.parse is built into every JavaScript engine. YAML parsing is slower and more complex — YAML spec is 80+ pages vs JSON's 2 pages. YAML has security risks (billion laughs attack via anchors) that JSON doesn't. Always use a safe YAML parser that disables anchors.
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Compare ecosystem usage
JSON: REST APIs, package.json, tsconfig.json, NoSQL databases, web apps. YAML: Docker Compose, Kubernetes manifests, GitHub Actions, Ansible playbooks, CI/CD configs, OpenAPI specs. JSON dominates runtime data; YAML dominates configuration.
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Decide based on your use case
APIs, data interchange, NoSQL, web app state: JSON. Configuration files, DevOps, CI/CD, infrastructure-as-code: YAML. If humans write it by hand: YAML. If machines generate and consume it: JSON.
Examples
Same config in JSON and YAML
Input: JSON: {"server": {"port": 8080, "host": "localhost"}}
YAML: server:\n port: 8080\n host: localhost
Output: YAML is 30% shorter and supports comments. JSON is stricter and universally parseable.
Common Problems
- YAML indentation errors: YAML uses indentation for structure, and a single wrong space breaks parsing — use an editor with YAML linting and always use spaces, never tabs.
- YAML billion laughs attack: YAML anchors and aliases can create exponential expansion, causing DoS — use a safe YAML parser that disables anchors (e.g. yaml.safe_load in Python).
- JSON has no comments: JSON spec forbids comments, making configuration files harder to annotate — use YAML for human-edited config, JSON for machine-generated data.
- YAML implicit typing surprises: YAML auto-converts yes/no to booleans and 1.0 to float, which can break string fields — quote strings explicitly to avoid unexpected type coercion.
Tips
- Use YAML for human-authored configuration (Docker Compose, Kubernetes, CI/CD) and JSON for machine-generated data interchange (APIs, NoSQL, app state).
- Always use a safe YAML parser that disables anchors and aliases — never use a general-purpose YAML loader on untrusted input.
- When converting YAML to JSON, expect to lose comments, multiline strings, and anchors — JSON is a subset of YAML, not the other way around for features.
- Indent YAML with 2 spaces consistently — mixing tabs and spaces or using inconsistent indentation is the most common YAML parsing error.