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Tips, guides, and tutorials for our free online tools.

JSON vs YAML: Which One Should You Use?

YAML is cleaner for config, JSON is better for APIs. Here's when to use each — and a free converter for both directions.

Link previews looking wrong on Facebook or Slack? Here's how to debug Open Graph tags — and a free previewer.

Need an API key, session token, or test password? Here's how to generate secure random strings — with a free tool.

Converting Markdown to HTML shouldn't mangle your tables or code blocks. Here's how to do it right — with a free tool.

Everything you type becomes binary under the hood. Here's how that works and a free tool to translate text to binary.