Tools
Developer Tools
Free, browser-based utilities — no signup required. Pick a tool and get started.
JSON Formatter
Beautify, validate, and minify JSON with syntax highlighting.
Developer
OpenUUID Generator
Generate random UUID v4 and v1 identifiers instantly.
DeveloperNew
OpenHash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.
DeveloperNew
OpenMarkdown to HTML Previewer
Write Markdown and preview the rendered result and HTML output live.
DeveloperNew
OpenDiff Checker
Compare two blocks of text and highlight added, removed, and unchanged lines.
DeveloperNew
OpenIP & Subnet Calculator
Convert IPv4 addresses, calculate CIDR subnets, and expand or compress IPv6 addresses.
DeveloperNew
OpenUTM Link Builder
Build campaign tracking URLs with utm_source, utm_medium, utm_campaign, and more.
DeveloperNew
OpenCron Expression Explainer
Decode cron schedules into plain English with a field-by-field breakdown.
DeveloperNew
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