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nestoo
  • What is my IPYour public IPv4 and IPv6 address, location and provider.Network & IP
  • Speed testMeasure your download and upload speed, latency and jitter.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
  • Prefix lookupCheck a prefix in BGP, RPKI and the IRRs before you announce it.Network & IP
  • ASN lookupOwner, announced prefixes and neighbours of any AS number.Network & IP
  • Subnet calculatorNetwork, broadcast, host range and mask of any IPv4 or IPv6 subnet.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
  • SPF, DKIM and DMARC checkerCheck a domain’s SPF, DKIM and DMARC records for mistakes.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
  • Image compressorMake JPG, PNG, WebP and AVIF files smaller, many at once.Image tools
  • Image resizerResize images to exact pixels or by percentage, many at once.Image tools
  • Image converterConvert HEIC, PNG, WebP, AVIF and more to JPG, PNG, WebP or AVIF.Image tools
  • Crop imageCrop, rotate and flip images to any size or aspect ratio.Image tools
  • EXIF viewer and removerSee the hidden data in photos, including location, and remove it.Image tools
  • Favicon generatorTurn a logo into favicon.ico, Apple touch icon and app icons.Image tools
  • Image to Base64Turn images into Base64 data URIs, and data URIs back into images.Image 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

Terms of use

Last updated September 26, 2026

Using nestoo

nestoo’s tools are free to use for personal and commercial purposes. By using the site you agree to these terms.

Fair and lawful use

Use the network tools only on systems you own or are allowed to test. Don’t use nestoo to attack, scan or overload other people’s servers, to get around security measures, or for anything illegal.

Requests are rate-limited to keep the service available for everyone. Automated or bulk use of the API without permission isn’t allowed.

No warranty

The tools and their results are provided as they are, without any warranty. Location data, WHOIS records and other lookups come from third-party sources and can be incomplete or out of date. Don’t rely on them for decisions where an error could cause harm.

Changes

Tools may change, be added or be removed at any time, and these terms may be updated. The date above shows the latest version. Questions? Write to hello@nestoo.io.