Tools

A, AAAA, MX, TXT, NS, CNAME, SOA for a hostname or domain.

Query public WHOIS for a domain or IP. Rate limited.

Your current IP and WHOIS. Private/link-local detection.

Ping a hostname or IP from the server. Round-trip times, packet loss.

SSL/TLS certificate: issuer, validity, SANs, fingerprint.

Send a test email; get SPF, DKIM, DMARC and a score. Report downloadable.

Check if an IP, hostname, domain or email is on public RBLs.

Paste raw headers to view From, To, Received, SPF, DKIM. Nothing stored.

Measure DNS, connection, TTFB and total time for a URL. With rating.

Ping, download and upload between your device and this server (~15–20 s).

First-hop cookies, third parties in HTML, headers, rough tracker matches.

Why spam detection is hard; generate bot-resistant email snippets for WordPress and static sites.

Build five-field cron expressions from presets or custom fields; short human summary.

Searchable HTTP status, SMTP reply, and DSN (RFC 3463) reference.

Placeholder paragraphs, word count, or bullet lists. Copy-ready.

Sample identity cards for demos: name, address, contact, finance-style numbers, employment, and similar fields.

Word and character counts, reading time; trim, case, dedupe and sort lines.

JavaScript RegExp matches, groups, replace preview, highlighted subject.

Compare two texts line by line; unified-style additions and deletions.

Share text at /p… links — optional in-browser encryption (AES-256-GCM) or plaintext. Anonymous pastes expire in ~30 days; donors pick the colour theme; optional stars, compact layout, and code highlighting.

Short y… URLs with safety interstitial, TLS preview, expiry; donor: forever, instant redirect, themes, link list.

HTL horizontal text bands, FTF resizable text boxes, images, signatures; named export. Local processing; optional layout templates.

Generate segmented passwords. Configurable segments, separator, character sets.

Diagonal text or logo tiles, caption strip, named PNG export.

Plain or studio-style backdrops: colour mask in the browser, same size PNG with transparency.

Grey placeholders with logical size, file pixel dimensions, and ratio on the image; download PNG, JPEG, WebP, or SVG.

Text favicons: colours, rounded or circle, self-hosted fonts; PNG sizes, multi-size ICO, portable SVG.

QR with optional centre logo (memory only), pixel width/height, barcodes, colours, caption; PNG.

RSA key pair and optional PKCS#10 CSR in the browser; PEM download.

Accents, dark-theme wall, flat/Bootstrap, gray ramps, glass/synth; popup for values.

Paste, drop, or file; sample pixels; HEX/RGB/HSL/CMYK + copy; up to ten prominent swatches. Browser-only.

Mod-97 check and country length table; no bank lookup.