FOR YOUR EVERYDAY WORK
Developer tools
No account. No uploads. Your data stays in your browser.
JSON formatter
Validate, format, and minify JSON with readable output and clear syntax errors.
Format · validate · minifyBase64 converter
Encode and decode UTF-8 text, including emoji and multilingual content.
UTF-8 · encode · decodeURL & query inspector
Inspect URL components and repeated query parameters, or encode and decode text.
Inspect · encode · decodeFOR THE PROJECTS YOU CARE FOR
Maintainer tools
Public GitHub workflows, plus a shared library and CLI.
Repository readiness
See what your repository offers contributors, find the gaps, and leave with a practical checklist.
codein audit owner/repoContribution templates
Create contribution guidance, issue forms, and a PR template that fit how your project works.
codein templates --repo owner/repoContributor credits
Turn your public GitHub contributor history into a shareable, exportable acknowledgement.
codein credits owner/repoYours to use. Yours to improve.
The maintainer tools share portable, tested TypeScript engines with the CLI. Developer utilities also have a browser-portable library entry point. Bring them into your own workflow under the MIT license.
CLI & libraries →Built in the open.
Have a useful edge case, a clearer error, or an idea for a tool? Start a discussion and help shape what comes next.
Explore the source ↗