Every feature, fix, and improvement to FerrLens. https://ferrlens.com/changelog/ en-us https://ferrlens.com/changelog/2026-10-06-ferrlens-tool-guides/ https://ferrlens.com/changelog/2026-10-06-ferrlens-tool-guides/ Tue, 06 Oct 2026 06:00:00 GMT Five tools now explain what they check, how to read the result and how to fix the usual problems, in English and French. ferrlens new https://ferrlens.com/changelog/2026-10-03-ferrlens-sec-headers-a-plus/ https://ferrlens.com/changelog/2026-10-03-ferrlens-sec-headers-a-plus/ Sat, 03 Oct 2026 10:00:00 GMT A fully hardened site now scores 100 and gets A+, instead of topping out at A. ferrlens fix https://ferrlens.com/changelog/2026-09-25-ferrlens-spf-large-txt/ https://ferrlens.com/changelog/2026-09-25-ferrlens-spf-large-txt/ Fri, 25 Sep 2026 09:00:00 GMT The SPF / DKIM / DMARC tool no longer reports a missing SPF record when the domain's TXT answer is too large for UDP. ferrlens fix https://ferrlens.com/changelog/2026-05-21-ferrlens-ct-search/ https://ferrlens.com/changelog/2026-05-21-ferrlens-ct-search/ Thu, 21 May 2026 07:20:00 GMT Find every TLS certificate ever issued for a domain by querying the public Certificate Transparency logs (crt.sh): great for subdomain discovery and rogue-cert detection. ferrlens new https://ferrlens.com/changelog/2026-05-21-ferrlens-cors-tester/ https://ferrlens.com/changelog/2026-05-21-ferrlens-cors-tester/ Thu, 21 May 2026 07:15:00 GMT Send a preflight + actual request from a configurable Origin and see exactly which CORS headers the server returns: with pass/fail diagnostics. ferrlens new https://ferrlens.com/changelog/2026-05-21-ferrlens-mixed-content/ https://ferrlens.com/changelog/2026-05-21-ferrlens-mixed-content/ Thu, 21 May 2026 07:10:00 GMT Scan an HTTPS page for HTTP-only src / href / action / poster / data-src resources that modern browsers block. ferrlens new https://ferrlens.com/changelog/2026-05-21-ferrlens-og-preview/ https://ferrlens.com/changelog/2026-05-21-ferrlens-og-preview/ Thu, 21 May 2026 07:05:00 GMT See how a URL renders as a Twitter card, LinkedIn share and Slack unfurl: side by side, with warnings for missing or oversized fields. ferrlens new https://ferrlens.com/changelog/2026-05-21-ferrlens-meta-inspector/ https://ferrlens.com/changelog/2026-05-21-ferrlens-meta-inspector/ Thu, 21 May 2026 07:00:00 GMT Fetch any URL and see every meta + link tag grouped by namespace: standard, OpenGraph, Twitter, Facebook, http-equiv, link. ferrlens new https://ferrlens.com/changelog/2026-05-21-ferrlens-ascii-unicode/ https://ferrlens.com/changelog/2026-05-21-ferrlens-ascii-unicode/ Thu, 21 May 2026 06:20:00 GMT Codepoint-by-codepoint breakdown of any string: UTF-8 bytes, UTF-16 units, HTML entities, CSS escape and Unicode block. ferrlens new https://ferrlens.com/changelog/2026-05-21-ferrlens-punycode/ https://ferrlens.com/changelog/2026-05-21-ferrlens-punycode/ Thu, 21 May 2026 06:15:00 GMT Internationalised domain names (IDN) to ASCII Punycode and back, using the browser's native URL parser. ferrlens new https://ferrlens.com/changelog/2026-05-21-ferrlens-ip-cidr/ https://ferrlens.com/changelog/2026-05-21-ferrlens-ip-cidr/ Thu, 21 May 2026 06:10:00 GMT IPv4 and IPv6 CIDR math: network, broadcast, usable host range, netmask, total hosts, and address classification. ferrlens new https://ferrlens.com/changelog/2026-05-21-ferrlens-user-agent/ https://ferrlens.com/changelog/2026-05-21-ferrlens-user-agent/ Thu, 21 May 2026 06:05:00 GMT Break down any User-Agent string into browser, engine, OS, device and bot heuristics. No remote call. ferrlens new https://ferrlens.com/changelog/2026-05-21-ferrlens-http-status/ https://ferrlens.com/changelog/2026-05-21-ferrlens-http-status/ Thu, 21 May 2026 06:00:00 GMT Searchable dictionary of HTTP status codes: number, reason phrase, category and what each one actually means in practice. ferrlens new https://ferrlens.com/changelog/2026-05-20-ferrlens-sitemap/ https://ferrlens.com/changelog/2026-05-20-ferrlens-sitemap/ Wed, 20 May 2026 06:25:00 GMT Fetch a sitemap.xml or a sitemap index, validate the XML, list child sitemaps or sample the URLs with lastmod / changefreq / priority. ferrlens new https://ferrlens.com/changelog/2026-05-20-ferrlens-robots/ https://ferrlens.com/changelog/2026-05-20-ferrlens-robots/ Wed, 20 May 2026 06:20:00 GMT Fetch and parse a domain's robots.txt, simulate a crawl decision for any User-Agent + path, list every declared sitemap. ferrlens new https://ferrlens.com/changelog/2026-05-20-ferrlens-sec-headers/ https://ferrlens.com/changelog/2026-05-20-ferrlens-sec-headers/ Wed, 20 May 2026 06:15:00 GMT Score any URL on CSP, HSTS, X-Frame, X-Content-Type, Referrer-Policy, Permissions-Policy, COOP and CORP. A+ to F grade out of 90 points. ferrlens new https://ferrlens.com/changelog/2026-05-20-ferrlens-http-headers/ https://ferrlens.com/changelog/2026-05-20-ferrlens-http-headers/ Wed, 20 May 2026 06:10:00 GMT Fetch any URL, see every response header, the full redirect chain, and the time it took. Like curl -ILv but rendered nicely. ferrlens new https://ferrlens.com/changelog/2026-05-20-ferrlens-reverse-dns/ https://ferrlens.com/changelog/2026-05-20-ferrlens-reverse-dns/ Wed, 20 May 2026 06:05:00 GMT IP address (v4 or v6) → PTR hostname lookup. Useful for tracing the rDNS of a mail server or checking that your IP resolves to the hostname you think it does. ferrlens new https://ferrlens.com/changelog/2026-05-20-ferrlens-dns-lookup/ https://ferrlens.com/changelog/2026-05-20-ferrlens-dns-lookup/ Wed, 20 May 2026 06:00:00 GMT A, AAAA, MX, TXT, NS, SOA, SRV in one shot, queried in parallel against Cloudflare's public resolvers. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-diff-tool/ https://ferrlens.com/changelog/2026-05-19-ferrlens-diff-tool/ Tue, 19 May 2026 22:00:00 GMT Paste two blobs, get a side-by-side or unified diff with inline character highlights. Whitespace and case toggles. Fully client-side: the URL fragment encodes both inputs so you can share without uploading anything. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-localtime-and-sse-hook/ https://ferrlens.com/changelog/2026-05-19-ferrlens-localtime-and-sse-hook/ Tue, 19 May 2026 19:00:00 GMT Snapshot timestamps and scan-fetched-at on shared SEO pages used to render in the server's timezone. They now show in yours. Plus a reusable SSE hook so future streaming tools share the same pattern as the SEO checker. ferrlens fix https://ferrlens.com/changelog/2026-05-19-ferrlens-spam-score/ https://ferrlens.com/changelog/2026-05-19-ferrlens-spam-score/ Tue, 19 May 2026 17:45:00 GMT Drop a subject + body, get a 0-10 spam score with the exact rules that flagged each line. Runs entirely in your browser: your draft never leaves the page. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-email-verify/ https://ferrlens.com/changelog/2026-05-19-ferrlens-email-verify/ Tue, 19 May 2026 17:40:00 GMT Syntax + MX record check + disposable-provider list + role-based local-part detection. Real SMTP probe comes later. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-blacklist/ https://ferrlens.com/changelog/2026-05-19-ferrlens-blacklist/ Tue, 19 May 2026 17:35:00 GMT Query an IP or domain against 30 major DNSBLs (Spamhaus, SpamCop, Barracuda, SORBS, UCEProtect, Mailspike, …) in parallel. Verdict in under a second. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-spf-dmarc/ https://ferrlens.com/changelog/2026-05-19-ferrlens-spf-dmarc/ Tue, 19 May 2026 17:30:00 GMT Pull, parse and score a domain's email-authentication TXT records: SPF mechanisms, DMARC policy + reports, ~30 common DKIM selectors checked in parallel. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-french-localisation/ https://ferrlens.com/changelog/2026-05-19-ferrlens-french-localisation/ Tue, 19 May 2026 16:30:00 GMT 38 nouvelles routes /fr/ (home, pricing, account, les 8 pages légales, le changelog et les 21 outils), avec un sélecteur EN/FR en haut de chaque page. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-compressed-share-links/ https://ferrlens.com/changelog/2026-05-19-ferrlens-compressed-share-links/ Tue, 19 May 2026 16:00:00 GMT Share links from any tool now embed state as a single lz-string-compressed JSON blob instead of plain key=value pairs: 30-70% shorter, no longer human-readable. ferrlens perf https://ferrlens.com/changelog/2026-05-19-ferrlens-live-seo-scan/ https://ferrlens.com/changelog/2026-05-19-ferrlens-live-seo-scan/ Tue, 19 May 2026 16:00:00 GMT The SEO checker no longer waits 20 s before showing anything. Core Web Vitals appear in ~3 s, then full Lighthouse scores fill in. Chromium is now pooled, K8s right-sized, perf flags fixed. ferrlens perf https://ferrlens.com/changelog/2026-05-19-ferrlens-text-stats/ https://ferrlens.com/changelog/2026-05-19-ferrlens-text-stats/ Tue, 19 May 2026 14:20:00 GMT Characters, words, lines, sentences, paragraphs, reading time and approximate LLM token count for any block of text. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-luhn-iban/ https://ferrlens.com/changelog/2026-05-19-ferrlens-luhn-iban/ Tue, 19 May 2026 14:18:00 GMT Validate credit card numbers with the Luhn algorithm and issuer detection, or IBANs with a mod-97 check and per-country length validation. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-file-hash/ https://ferrlens.com/changelog/2026-05-19-ferrlens-file-hash/ Tue, 19 May 2026 14:15:00 GMT Drop a file, get its MD5, SHA-1, SHA-256 and SHA-512: computed locally, the file never leaves your browser. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-jwt-signature-verify/ https://ferrlens.com/changelog/2026-05-19-ferrlens-jwt-signature-verify/ Tue, 19 May 2026 14:12:00 GMT Verify a JWT against a public key (PEM or JWK) through the native Web Crypto API: HS, RS, PS and ES families, all algorithms. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-base-converter/ https://ferrlens.com/changelog/2026-05-19-ferrlens-base-converter/ Tue, 19 May 2026 14:10:00 GMT Convert between binary, octal, decimal and hex with BigInt arithmetic. No precision loss even on 128-bit numbers. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-slugify/ https://ferrlens.com/changelog/2026-05-19-ferrlens-slugify/ Tue, 19 May 2026 14:08:00 GMT Turn any string (accented, punctuated, multi-word) into a clean URL slug. Configurable separator, max length, and case. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-case-converter/ https://ferrlens.com/changelog/2026-05-19-ferrlens-case-converter/ Tue, 19 May 2026 14:05:00 GMT Convert between 11 case styles: camelCase, PascalCase, snake_case, SCREAMING_SNAKE, kebab-case, COBOL-CASE, dot.case, Title Case, Sentence case, lower, UPPER. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-user-menu/ https://ferrlens.com/changelog/2026-05-19-ferrlens-user-menu/ Tue, 19 May 2026 14:00:00 GMT Signed-in users now see an avatar + tier pill in the FerrLens navbar instead of a plain Account link. The dropdown surfaces email, plan, Upgrade CTA and Sign out. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-password-generator/ https://ferrlens.com/changelog/2026-05-19-ferrlens-password-generator/ Tue, 19 May 2026 13:42:00 GMT Generate strong passwords with configurable charsets, a "no look-alikes" mode, an entropy bar and a crack-time estimate: backed by crypto.getRandomValues. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-color-converter/ https://ferrlens.com/changelog/2026-05-19-ferrlens-color-converter/ Tue, 19 May 2026 13:41:00 GMT HEX ↔ RGB ↔ HSL ↔ OKLCH with a live colour preview, alpha-aware. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-timestamp-converter/ https://ferrlens.com/changelog/2026-05-19-ferrlens-timestamp-converter/ Tue, 19 May 2026 13:40:00 GMT Convert between Unix seconds, Unix milliseconds and ISO 8601, with a live view in any IANA timezone plus a relative reading ("3 days ago"). ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-hmac-generator/ https://ferrlens.com/changelog/2026-05-19-ferrlens-hmac-generator/ Tue, 19 May 2026 13:38:00 GMT Generate HMAC-SHA1/256/384/512 of a message with a key in UTF-8, hex or Base64: through the native Web Crypto API, in your browser. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-encoders/ https://ferrlens.com/changelog/2026-05-19-ferrlens-encoders/ Tue, 19 May 2026 13:35:00 GMT Encode and decode between text and URL-percent / Base64 / Base64-URL (RFC 4648 §5) / hex, with a single shared input that toggles direction in one click. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-hash-generator/ https://ferrlens.com/changelog/2026-05-19-ferrlens-hash-generator/ Tue, 19 May 2026 13:30:00 GMT MD5, SHA-1, SHA-256, SHA-384 and SHA-512 of any input. SHA-* through the native Web Crypto API, MD5 through a small pure-JS implementation. Your input never leaves the browser. ferrlens new https://ferrlens.com/changelog/2026-05-19-ferrlens-sign-in/ https://ferrlens.com/changelog/2026-05-19-ferrlens-sign-in/ Tue, 19 May 2026 10:00:00 GMT ferrlens.com now uses the central FerrLabs identity, so the same account works across every product site. Cross-domain auth handled server-side by the Astro SSR layer. No token in JavaScript. ferrlens new https://ferrlens.com/changelog/2026-05-18-ferrlens-headless-lighthouse/ https://ferrlens.com/changelog/2026-05-18-ferrlens-headless-lighthouse/ Mon, 18 May 2026 14:00:00 GMT ferrlens.com now runs a real Lighthouse against a real Chromium in-cluster, instead of waiting for Google PageSpeed Insights. Faster, no quota, more signals. ferrlens perf