Free online tools
Choose a specific task: check a website or domain, diagnose your connection, or use a browser-based utility that keeps your input local.
Checks
Websites, domains and email
ToolWebsite checker: SEO, HTTPS and HTTP statusEnter a URL and check its HTTP status, HTTPS, redirects, title, meta description, canonical, robots.txt, sitemap and basic security headers.ToolWHOIS domain / RDAP lookupCheck a domain's registration date, expiry, registrar, nameservers, status and DNSSEC using official RDAP data when available.ToolDNS lookup: check your domain's DNS recordsInspect domain DNS records: A, AAAA, CNAME, MX, TXT, NS, SOA and CAA, including TTL, query status and DNSSEC validation by the resolver.ToolSPF, DMARC and DKIM checkerCheck domain SPF and DMARC records and optionally a DKIM selector. View policy settings, common warnings and public email authentication DNS records.ToolEmail header analyzerPaste raw email headers to inspect SPF, DKIM, DMARC, From, Reply-To, Return-Path, Message-ID and the Received server path locally.ToolMy public IP addressSee the public IP address with which your request reached splet.me. We do not save it to a user profile.ToolIPv4 CIDR calculatorCalculate the network address, subnet mask, wildcard mask, broadcast and usable host range from an IPv4 CIDR value locally.ToolIPv6 CIDR calculatorCalculate canonical IPv6 notation, network prefix, first and last addresses, and address count from an IPv6 CIDR value locally.
Connection
Speeds and transfers
ToolInternet speed testFree internet speed test with no app: measure download, upload, ping and jitter, and see whether your connection is good enough for 4K video, video calls and gaming.ToolMbps ↔ MB/s calculatorConvert Mbps to MB/s and back instantly. Table for 10 to 10,000 Mbps with download times for 1 GB, 4 GB and 50 GB files, plus a real speed test.ToolDownload time calculatorEstimate how long a file download will take based on its size and your connection speed.
Local in your browser
Data, text and security
ToolJSON formatter and validatorFormat and validate JSON locally in your browser. Your JSON is not sent to the server for formatting.ToolBase64 encode / decodeEncode or decode text using Base64 locally. Unicode is supported and your input is not sent to the server.ToolURL encode / decodeEncode or decode a URL component with encodeURIComponent and decodeURIComponent, directly in your browser.ToolUnix timestamp converterConvert Unix timestamps to local time and UTC, or convert a date back to a Unix timestamp.ToolStrong password generatorGenerate a random password locally using the Web Crypto API. The password is not sent to splet.me.ToolWord and character counterCount words, characters, characters without whitespace, lines and approximate sentences locally in your browser.