DNS records, SSL certificates, HTTP headers, CORS behaviour, and IP details — all from a single hostname.

• DNS Records
• SSL / TLS
• HTTP Headers
• CORS
• IP Info
• Robots / Sitemap

Paste raw email headers and see the full routing chain, SPF / DKIM / DMARC results, and per-hop timestamps.

Generate a temporary URL, fire requests at it, and inspect every header and payload in real time.

Decode JWTs, sign HMAC messages, generate live TOTP codes, hash text, and produce UUIDs, passphrases, and passwords — all client-side.

• JWT
• HMAC
• TOTP
• Hash
• UUID / CUID
• Password
• Passphrase

Live match highlighting, capture groups, named groups, flag toggles, replace preview, and per-match metadata — all in one view.

Convert between formats, pretty-print and validate, run JSONPath queries, validate against a schema, or minify — all from one pane.

• Flux — Convert
• Anneal — Format
• Draw — Query
• Quench — Minify
• Temper — Validate

Decompose a URL into scheme, host, port, path, query parameters, and fragment. Edit any field and reconstruct.

Convert Unix timestamps to human-readable dates across multiple timezones simultaneously — or convert back.

Case conversion, line operations, slug generation, multi-target escaping, readability scoring, and ANSI preview — shared pane, one switcher.

• Case
• Lines
• Slug
• Escape
• Stats
• Readability
• ANSI

Paste any text and see every character's codepoint, UTF-8 byte sequence, HTML entity, and Unicode name.

Paste Mermaid or PlantUML source and see the rendered diagram instantly in a clean split-pane editor.

Visual CSP header constructor. Choose directives, add sources, preview the full header string, and copy to clipboard.

Strip metadata and compress paths with SVGO-equivalent optimisation, or view SVG source alongside the rendered output.

• Optimize
• Inspect

px ↔ rem ↔ em conversion with configurable base size, specificity scoring with visual breakdown, and aspect ratio calculation.

• Units
• Specificity
• Aspect Ratio

Color picker, palette generator, WCAG AA/AAA contrast checker, and export to CSS variables, Tailwind, SCSS, HEX, HSL, and RGB.

Construct a CRON expression with a visual builder, get a plain-English explanation, and see the next N scheduled run times.

Enter a version and a range constraint — see immediately whether it satisfies. Supports npm, Composer, and Cargo syntax.

Paste a minified stack trace alongside a source map and get a fully decoded, readable stack. No more copy-paste-decode loops.

Paste HTML and see how the Open Graph card renders in Slack, LinkedIn, and X. Catches missing images and truncated titles before they ship.

The bureaucratic calculator. Don't ask.