🛠️ Dev
Developer Tools
Formatters, validators, and encoders for everyday developer workflows—runs entirely in your browser.
- Developer Tools
JSON Formatter & Validator
Format, beautify, validate, and minify your JSON data instantly with local syntax error highlighting.
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Base64 Encode/Decode
Encode text to Base64 format or decode Base64 strings back to text instantly with full UTF-8 support and zero data leakage.
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UUID/GUID Generator
Generate high-quality cryptographically secure UUID v4 tokens instantly with bulk options and zero server tracking.
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Regex Tester
Test and debug your regular expressions in real-time with live syntax highlighting, group captures, and flag toggles.
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JWT Decoder
Decode JSON Web Tokens (JWT) instantly on the client-side. View header, payload, and signature data safely with built-in timestamp humanizer.
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WCAG Color Contrast Checker
Check text-to-background color contrast ratios in real-time. Verify WCAG 2.1 AA and AAA compliance instantly for accessible web design.
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Markdown Live Previewer
Write and preview Markdown syntax in real-time. Render clean HTML with instant visualization without any server-side data tracking.
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Cron Expression Explainer
Decode and validate cron expressions instantly. Convert complex crontab schedules into human-readable natural language descriptions.
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Free Browser-Based Developer Utilities
Everyday engineering work still needs a JSON formatter, Base64 helper, JWT decoder, regex tester, or cron explainer. These developer tools run entirely client-side so tokens, payloads, and sample data never leave your machine.
Open a tool, paste the snippet, and move on—no account wall and no remote pastebin of your secrets.