Test your device, connection and privacy — free, no downloads
Everything runs in your browser. Nothing is uploaded, and every result tells you what it cannot measure as well as what it can.
- Runs where
- Runs entirely in your browser
- Account
- No sign-up, no uploads
- Price
- Free
Explore tool categories
23tools across 8categories.
- /test/DeviceConsumers, gamers, WFH, used-device buyers
- /network/ConnectionConsumers + IT/admin
- /printer/PrinterHome + office + technicians
- /image/ImageEveryone
- /interpret/InterpreterRepair techs + IT + consumers
- /ip/NetMathNetwork admins, students
- /privacy/PrivacyPrivacy-conscious consumers
- /security/SecurityConsumers + devs
Available now
- Proxy / VPN Signal CheckCheck whether your traffic is being rerouted — and see what sites see.
- Fingerprint Uniqueness ScoreSee the signals that identify your browser without a single cookie.
- CIDR to IP RangeExpand any CIDR block into its network, broadcast and usable host range.
- CNAME Chain TracerTrace a domain’s CNAME alias chain to where it finally points.
- DNS Lookup (all records)Query any DNS record type against two independent resolvers and compare their answers.
- Image CompressorShrink a photo in your browser. The file is never uploaded.
- IP to Decimal / Hex / BinaryConvert an IPv4 address to its integer, hex and binary forms, and back.
- Is This Site Down?Check whether a site answers from outside your own network.
- True Jitter Calculator (RFC 3550)Measure real jitter — the variation between consecutive packets, not deviation from the average.
- MAC Vendor (OUI) LookupFormat any MAC address and read the properties encoded in it.
- MX Record CheckerFind the mail servers a domain uses, in priority order.
- IP Location LookupSee the location your IP address reveals — and how rough that guess really is.
- ISP / ASN LookupFind out which network your traffic actually belongs to.
- My User AgentSee exactly what your browser announces to every site you visit.
- Nozzle Check PatternPrint a nozzle pattern and find out which print head channels are blocked.
- NS / Nameserver LookupSee which nameservers are authoritative for a domain.
- Password Strength CheckerSee how long a password would actually survive — and why length beats symbols.
- Reverse DNS (PTR)Find the hostname an IP address resolves back to.
- TXT / SPF ViewerRead a domain’s SPF record and see which servers may send its mail.
- Subnet Mask to CIDRConvert between prefix length and subnet mask, with host counts.
- Webcam TestCheck your camera works, and see the resolution and frame rate it actually delivers.
- WebRTC Leak TestCheck whether WebRTC is revealing an address your VPN is meant to hide.
- What Is My IPThe address the internet sees when you connect.