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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

About nestoo

A nest of small, useful tools

nestoo brings together the tools you reach for when working online – checking an IP address or a DNS record, generating a password, formatting JSON, converting units – in one fast, uncluttered place. The name joins “nest” and “tools”, and nods to the Czech surname of its author, Hnízdo, which means nest.

It started in 2018 as WebovéNástroje.cz, a Czech site of tools for webmasters and server administrators. nestoo is its rebuilt successor: faster, available in several languages, and with a broader set of tools.

How the tools are built

Everything is free and needs no account. Tools that can run in your browser – passwords, hashes, encoders, converters and calculators – do, so what you type stays on your device. Network tools such as DNS, WHOIS and the port checker have to run on a server; they don’t store what you look up.

Pages are kept light so they load quickly on any connection. To keep nestoo free, some pages may show a small number of clearly labelled ads or recommendations.

Contact

Found a bug, a wrong translation or a tool you miss? Write to [email protected].