Bookmark the exact JSON, subnet, encoding, timestamp, or text utility you use regularly.
Private by design
The admin tools you need.
Private by default.
Fast, practical utilities for developers and system administrators. Ordinary tools stay in your tab; connected features are explicit and never persist input.
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◉ Local-first default◇ No input persistence↯ Instant results
Toolbox
Ready when you are
DNS record lookupLook up selected DNS record types through a disclosed, fixed Cloudflare resolver path.Online HTTP client & API testerImport a browser cURL or fetch request, send one bounded public HTTP request, and inspect its status, response headers, body, redirects, and timing.Online TCP port checkerCheck one public TCP port from the internet and review a safe telnet-style transcript with resolved IP, connection time, and optional server banner.SSL/TLS certificate checkerCheck SSL certificate expiry, trust, hostname, SANs, chain, SHA-256 fingerprints, protocol, cipher, and ALPN with a verified live TLS handshake.IPv4 CIDR calculatorCalculate network, broadcast, mask, wildcard, and usable address range.
Code formatter & beautifierFormat and syntax-color JavaScript, TypeScript, JSON, CSS, HTML, Markdown, and PHP locally.JavaScript, JSON & CSS minifierMinify JavaScript, JSON, or CSS with syntax-aware, bundled processors in your browser.URL parserBreak a URL into protocol, host, path, query parameters, and fragment.JWT decoder & verifierDecode claims, check time validity, and optionally verify a signature with an uploaded PEM certificate or public key.Hash & checksum calculatorCalculate CRC32, MD5, SHA-1, SHA-2, or SHA-3 digests locally as you type.UUID generatorCreate cryptographically random UUID v4 or time-ordered UUID v7 identifiers.Semantic version compareValidate and compare two SemVer 2.0 version strings.Color converterConvert colors between HEX, RGB, and HSL formats.
Built for repeat use
A useful result before the page gets in your way
Each page explains its input, output, common uses, edge cases, and privacy boundary.
Formatting and calculations happen on your device. Any optional connected feature identifies its network path before use.
The local-first default
Your tool input is not stored.
Ordinary tools run in this tab. Protected DNS, server HTTP, and TCP actions require fresh Turnstile; MySQL uses one verified session for at most one hour.