YAML and JSON Converter
Use YAML and JSON Converter
All GotoKit tools run directly online, no download required.
Free online YAML ↔ JSON converter. Paste YAML or JSON for instant bidirectional conversion with copy, download and clear. Ideal for config files, API docs, K8s and data exchange.
About this tool
Convert YAML and JSON both ways with validation, copy, download, and clearer error feedback for config and API work.
- Your input never leaves the browser
- Handles large files and batch input
- Customizable formatting and indent options
- Free and unlimited, no sign-up
Compared with IDE plugins or CLI tools
| Aspect | This tool | Typical alternative |
|---|---|---|
| Iteration speed | Better for quick paste-and-check loops | Deeper integration, heavier startup |
| Sharing | Easier to share samples and outputs | Better for longer engineering workflows |
| Environment dependency | Only needs a modern browser | Often depends on editor and local setup |
Docs
Convert YAML and JSON both ways with validation, copy, download, and clearer error feedback for config and API work.
Key Features
- Bidirectional conversion: JSON → YAML and YAML → JSON in one click
- Syntax validation: invalid JSON or YAML shows specific error details
- Independent copy: separate copy buttons for JSON and YAML
- Independent download: save as
.jsonor.yamlfiles - Clear: reset both panes with one click
- Sample data: built-in config example to demonstrate usage
- Local processing: all conversion happens in your browser; no data leaves your computer
How to Use
- Choose direction: click ”→ Convert to YAML” for JSON→YAML, or ”← Convert to JSON” for YAML→JSON.
- Paste or type data in the corresponding text area.
- Click the convert button and the result appears in the opposite pane.
- Error messages appear below the text area if the input is invalid.
- Copy or download individual panes, or clear both.
Use Cases
- Config management: Docker Compose, Kubernetes, CI/CD config format conversion
- API docs: bidirectional conversion between JSON Schema and YAML
- Data exchange: convert between backend JSON APIs and frontend YAML configs
- Learning: compare JSON and YAML syntax differences
Technical Notes
- Uses the MIT-licensed js-yaml library, loaded from CDN
- All processing is client-side; no data is sent to any server
- Supports modern YAML features (anchors, aliases, multiline strings)
Last verified: 2026-07-13
FAQ
Is it free?
Yes, completely free. No signup, no limits.
Will my data be uploaded?
No. All conversion is local in your browser. No data ever leaves your computer.
What YAML features are supported?
Standard YAML 1.2: anchors (&), aliases (*), multiline strings (|/>), tags, booleans, etc.
What if conversion fails?
Error details appear below the text area. Fix and re-click convert.
What is the max file size?
No hard limit, but very large files (>10MB) may lag. Process in batches.
Is this tool better for debugging, learning, or pre-production checks?
All three. Debugging benefits from fast iteration, learning benefits from immediate visual feedback, and pre-production checks benefit from validating formatting, syntax, and edge cases before deployment.
Will my code or data leave the browser?
Most developer tools here default to browser-side processing, which is better for code snippets, configs, and sensitive text. If any feature depends on a remote model or external API, that is explicitly called out on the page.
How is this different from an IDE plugin or command-line tool?
A web tool is usually faster for quick validation, link sharing, and cross-device use. IDE plugins and CLI tools are stronger when you want the capability embedded into a longer engineering workflow.
Do I need to sign up, download, or install anything?
Most Gotokit tools are designed to open directly in the browser without a separate install. If a tool has a quota, browser requirement, or third-party dependency, the page copy will state that clearly.
More from Developer
All Developer toolsSecure Password Generator
Generate strong random passwords locally with length controls, character set options, exclusions, and instant strength feedback.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512, and HMAC hashes from text or files entirely in your browser.
MD5 Generator and Checker
Generate MD5 hashes, compare two MD5 results, and create random passwords with instant MD5 output in one simple browser tool.
JSON Formatter and Validator
Format, validate, repair, search, and inspect JSON in a cleaner editor built for developers, APIs, and configuration files.
XML Formatter, Minifier & Validator
Format, minify and validate XML online. Pretty-print with configurable indent, sort attributes, collapse empty elements. All client-side, zero data upload.
URL Encoder and Decoder
Free online URL encoder & decoder with batch processing, encodeURI/encodeURIComponent dual modes, space handling, and auto-detect. All local, zero data upload.
Robots.txt Generator
Free online robots.txt generator with crawler presets, visual Allow/Disallow rules, sitemap support, live validation, and one-click download. Runs locally.
XML Sitemap Generator
Free online XML sitemap generator. Paste a URL list to build a standard sitemap.xml with lastmod/changefreq/priority batch settings, URL dedupe and validation, CSV/TSV/existing-sitemap import, and automatic sitemapindex splitting over 50,000 URLs. Runs fully in your browser.
Regex Tester
Test regular expressions in real time with live matches, highlighting, explanations, and reusable test cases.
Cron Expression Generator & Parser - Build Schedule Expressions
Free online cron expression generator and parser. Build schedule expressions visually with instant human-readable descriptions and next run time preview.