Tools

Free online tools for proxies, IP addresses, DNS and email

Everything we built for daily work with proxies and networks. Most tools run in your browser and query public services directly, so you need no sign-up.

Proxies

Check proxy lists and process them in bulk

Anonymity checkWebRTC leaks, time zone and language against the IP Proxy list converterChange the list format, drop duplicates and errors cURL to codeA curl command to Python, Node.js or PHP code with a proxy Proxy checking softwareWindows program and Linux script for bulk checks

IP and browser

Your address and browser, network owner, blacklists and subnets

My IP addressYour address, provider, country and connection headers My User-AgentYour browser string, OS and device User-Agent generatorFresh browser strings for scraper rotation ASN and providerOwner, ASN and networks of any IP or AS RBL checkWhether an IP sits in spam blacklists Subnet calculatorNetwork, mask, hosts and range of a CIDR block

Domain and DNS

Domain records and registration data

DNS lookupAll records of a domain in one query Domain health checkNS, SOA, A, MX, SPF, DMARC, CAA, DNSSEC and propagation WHOISOwner, registrar and dates of a domain Subdomain finderSubdomains and SSL certificates from CT logs Punycode converterIDN domains to xn-- and back, in bulk

Email

Sender authentication checks and record builders

Email domain checkMX, PTR, blacklists, SPF, DKIM, DMARC, BIMI, MTA-STS Email address checkSyntax, MX, disposable mailboxes and typos in addresses SPF checkSPF record, include tree and the 10-lookup limit DMARC checkDMARC policy, reports and a record builder DMARC report analyzerA DMARC XML report as a table of senders by IP DKIM checkDKIM key by selector and its length Email header analyzerMail route, delays and SPF, DKIM, DMARC results Email spam checkerContent score for text, links and markup, SpamAssassin style

Questions about the tools

01Are the tools free?

Yes, every tool is free and works without sign-up.

02Does the service see what I check?

Most tools run in your browser and call public services directly: Cloudflare and Google DNS, RIPEstat, RDAP. Our server only delivers the page itself.

03Why does a check sometimes not answer?

The tool waits for a public service. When that service is overloaded, the page takes a backup source or says plainly that there is no data. Repeat the check in a minute.

04Which tools help with proxy work?

My IP and the anonymity check show what sites see, RBL looks for the address in blacklists, the converter changes the list format, and SLP checks large lists.

05Is there an email check?

Yes. The domain email check looks at MX, SPF, DKIM, DMARC and blacklists, and separate pages read email headers, spam scores and DMARC reports.