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nestoo
  • What is my IPYour public IPv4 and IPv6 address, location and provider.Network & IP
  • IP lookupLocation, provider and network of any IP address.Network & IP
  • DNS lookupA, AAAA, MX, TXT, NS and other DNS records for any domain.Network & IP
  • WHOIS lookupOwner, registrar and expiry date of any domain or IP.Network & IP
  • Port checkerCheck whether a port is open on your IP or a server.Network & IP
  • HTTP headers checkerResponse headers, status codes and redirect chain of a URL.Network & IP
  • SSL checkerCertificate validity, expiry and chain of any website.Network & IP
  • Password generatorStrong, random passwords generated right in your browser.Passwords & security
  • Password strength checkerHow long a password would take to crack, and if it leaked.Passwords & security
  • Hash generatorMD5, SHA-1, SHA-256, SHA-512 and CRC32 hashes of text or files.Passwords & security
  • JSON formatterFormat, validate and minify JSON, with exact error locations.Developer tools
  • Base64 encoder/decoderEncode text or files to Base64 and decode it back.Developer tools
  • URL encoder/decoderEncode and decode URLs and query strings, and parse any URL.Developer tools
  • JWT decoderRead the header and claims of a JSON Web Token.Developer tools
  • UUID generatorRandom UUID v4 and time-ordered v7 identifiers.Developer tools
  • Unix timestamp converterConvert Unix timestamps to dates and dates to epoch time.Developer tools
  • Binary converterTranslate text to binary and convert between number bases.Developer tools
  • Word counterCount words, characters, sentences and reading time.Text tools
  • Case converterUPPERCASE, lowercase, Title Case, camelCase, snake_case and more.Text tools
  • Diff checkerCompare two texts and highlight the differences.Text tools
  • QR code generatorFree QR codes for links, text, Wi-Fi and contacts, as PNG or SVG.Everyday tools
  • Percentage calculatorPercent of a number, percentage change, increase and decrease.Everyday tools
  • Unit converterConvert length, weight, temperature, volume, data and more.Everyday tools

Privacy policy

Last updated September 26, 2026

The short version

nestoo has no user accounts and doesn’t keep a database of what you enter. Tools that can run in your browser never send your input to us. Lookups that need a server are processed only to show you the result.

Tools that run in your browser

The password generator, password strength checker, hash generator, JSON formatter, Base64 and URL encoders, JWT decoder, UUID generator, timestamp, binary, text, QR code, percentage and unit tools work entirely on your device. Their input is never transmitted to nestoo.

The password strength checker can also check whether a password appears in known data breaches, but only when you click the button. It then sends the first five characters of the password’s SHA-1 hash to the Have I Been Pwned service and compares the answer on your device, so neither the password nor its full hash leaves your browser.

Tools that run on our server

IP lookup, DNS lookup, WHOIS, the port checker, HTTP header checker and SSL checker send the domain, IP address or URL you enter to our server, which performs the lookup and returns the result. We don’t store these queries. To prevent abuse, your IP address is kept in memory for about a minute to enforce request limits.

To answer DNS queries our server uses the public resolvers of Cloudflare (1.1.1.1) and Google (8.8.8.8); WHOIS and RDAP queries go to the registry responsible for the domain or IP address.

What is my IP

To show both your IPv4 and IPv6 address, your browser contacts Cloudflare’s public 1.1.1.1 service, which answers with the address it sees. Your approximate location is looked up in a database stored on our server.

Hosting and logs

nestoo runs on Railway and may be delivered through Cloudflare’s network. Like any web server, they can record technical request data – IP address, requested page, browser type and time – in short-lived logs used for security and troubleshooting.

Analytics

We may measure visits with privacy-friendly analytics that doesn’t use cookies and only reports aggregated numbers, such as how often each tool is used. This helps decide which tools to improve.

Ads and affiliate links

Some pages may show ads from Google. Google and its partners can use cookies or similar technologies to serve and measure ads; in the European Economic Area, the UK and Switzerland they ask for your consent first, and you can change your choice at any time via the privacy settings link shown with the consent message. See how Google uses information from sites that use its services at policies.google.com/technologies/partner-sites.

Recommendations labelled as sponsored are affiliate links: if you buy something after clicking one, nestoo may earn a commission. The partner’s site may set its own cookies.

Cookies and local storage

nestoo itself only stores your language and colour theme preferences in your browser. Everything else depends on the ads and analytics described above.

Your rights and contact

Under the GDPR you have the right to access, correct and delete your personal data and to object to its processing. Since we don’t keep personal data beyond the short-lived logs described above, there’s usually nothing stored about you. For any privacy question write to [email protected].