Free tools for IT, networks and everyday tech.

See what a website learns if you allow location access: your precise GPS position on a map, with accuracy. A privacy test, and your location never leaves your browser.

Your public IP address, who your internet provider is, your reverse DNS and what your browser reveals about you.

Who owns any IP address or host name: network and ASN, address block, country, reverse DNS and whether it's a hosting or VPN network. Up to 25 at once.

Find where Wi-Fi networks are from their MAC addresses (BSSIDs). Enter 1 to 5 networks, add signal strengths to sharpen it, and get a triangulated point on a map. For networks you're authorised to locate.

Find where a mobile phone mast is from its cell ID (MCC, MNC, LAC and CID), using Google Geolocation. Add signal strengths for a sharper, triangulated point on a map.

See which mobile networks have masts near a postcode or place, and whether they offer 2G, 3G, 4G or 5G, on a map. A rough coverage guide from OpenCellID.

Find the UK telecoms or VoIP provider behind an Ofcom CUPID code, or look up a provider's code. Covers every landline, mobile and VoIP operator on Ofcom's list.

Look up a mobile network from its MCC and MNC: the country and operator, or search by network or country name. UK networks in full, plus the major ones worldwide.

Find the manufacturer of any device from its MAC address using the official IEEE registry. Paste a whole ARP table, and spot random phone addresses and virtual machines.

Test port forwarding on your own connection, or scan your IP for risky services exposed to the internet: Remote Desktop, file sharing, databases, NAS and CCTV.

Check a website or mail server's certificate: expiry, issuer, names covered, chain and trust, key strength, TLS 1.0 to 1.3 support and CAA records.

Your real download and upload speed, plus how much lag builds up when the line is busy and what that does to video calls, gaming and phone calls.

Watch your connection for 1 to 10 minutes to catch lag spikes, jitter and dropouts, then see whether it's good enough for gaming, calls and streaming.

Check whether your internet provider or VPN is leaking your real IP through WebRTC, or blocking websites on your connection.

See which DNS servers really answer your lookups, so you can tell if your VPN or private DNS is leaking.

Find the fastest DNS server for your connection. Times 32 public resolvers from your browser and compares encrypted DNS, DNSSEC, malware and family filtering, and privacy.

Ping any website, server or IP from our UK server to check it's up and measure latency, jitter and loss, or test a TCP port when ping is blocked.

See every router between our UK server and any website or IP, who runs each network and where delay builds up. Trace back to your own connection too.

See any website's redirect chain and response headers, with a security header grade, cookie and caching checks, certificate expiry and HTTP/2 support.

Share text, passwords, screenshots and files between two computers with a private link. Encrypted, and wiped after 48 hours.

End-to-end encrypted chat rooms for 2 to 20 people, shared by a private link. Send messages and files; everything is deleted after 1, 24 or 48 hours.

Paste a suspicious link instead of clicking it. We follow it safely to where it really goes and check for scam signs: new or blocklisted domains, lookalikes, fake logins.

Scan a QR code with your camera or a screenshot and see where it really goes before you open it. Spots fake parking payment codes, lookalike links and other quishing tricks.

One-click report on any website: HTTPS and TLS, security headers, exposed files, out-of-date scripts, blocklists, SPF and DMARC, plus SEO basics and AI search readiness.

Check an email attachment before you open it: disguised programs, double extensions, hidden macros, Follina-style templates, risky PDFs, password-protected zips and fake sign-in pages.

Encrypt text or files up to 35 MB with AES-256 and a passphrase, in your browser. Paste-safe messages for email, .osir files, and an OpenSSL compatible mode.

See what your photos give away, including GPS location, camera serial numbers, dates and hidden previews, then remove it without losing quality. JPEG, PNG, WebP and HEIC.

See the 100+ details your browser gives away, and test whether websites can recognise you across private windows and VPNs without cookies.

Strong random passwords, easy-to-type passphrases, pronounceable passwords and PINs, made in your browser, with their strength and crack time.

How long would your password take to crack today, and with future GPUs, AI data centres and quantum computers? See what gives it away and check it against data breaches, privately.

MD5, SHA-1, SHA-2, SHA-3 and CRC32 hashes of text or files, checksum verification, HMAC signatures, and bcrypt password hashes for PHP and .htpasswd.

Create a Bitcoin address and private key offline in your browser and print them as a paper wallet with QR codes.

API keys, JWT and session secrets, Laravel, Django and WordPress keys, AES keys, 2FA secrets with QR codes, recovery codes, and SSH, WireGuard and signing key pairs.

Check a domain's SPF, DKIM and DMARC setup, plus MTA-STS, TLS reporting and BIMI, against Google, Microsoft and NCSC requirements, with the records to fix it.

Build ready-to-paste SPF, DMARC, MTA-STS, TLS-RPT and BIMI records. Pick your mail services, check the 10-lookup limit, plan a safe path to p=reject and lock down parked domains.

Open the DMARC reports Google, Microsoft and others email you to see every server sending as your domain, which are real services, which are spoofing, and when to move to p=reject.

Paste an email's headers to trace the servers it passed through, check SPF, DKIM and DMARC, decode spam filter verdicts and spot spoofed or hijacked senders.

Check a mail server IP or domain against Spamhaus, SpamCop, Barracuda and other blocklists, check its reverse DNS, and find out how to get delisted.

Find typo and lookalike versions of your domain that fraudsters register for invoice fraud and phishing, and see which exist, host websites or can send email.

From a domain name: Microsoft 365 tenant ID, region and sign-in type, Google Workspace, email, DNS and web hosts, CDN and platform, and the cloud services it uses.

Look up any DNS record, compare answers across six public resolvers and the authoritative servers, trace a lookup from the root and check DNSSEC.

Who a domain is registered with, when it was registered and when it expires, its status locks, nameservers and where it's hosted. Works for .com, .co.uk and most other endings.

Make a professional email signature for Outlook, Gmail and Apple Mail, with your logo, brand colour and social links, plus the company details UK businesses must show in emails.

Work through the 2026 Danzell question set, see exactly which answers would fail (including the new automatic fails), and keep an evidence log book you can save, share and print.

Get ready for the Cyber Essentials Plus audit: every self-assessment question plus the seven technical tests the assessor runs, with what to check before they arrive.

A 27-area audit well beyond Cyber Essentials: AI tools and agents, Microsoft 365 and Google integrations, deepfake and phishing-kit attacks, cloud servers with weekly testing, pen testing, backups and incident response.

Get ready for the NHS Data Security and Protection Toolkit 2026-27: pick your category, see which mandatory evidence items you meet, and keep a printable log book.

Test everyday computer, Microsoft 365, Word, Excel, Outlook and online safety skills. Marked instantly with explanations and a printable, verifiable result.

Send IT support your device, browser, screen, IP address, provider and a speed check as one short code. Encrypted, nothing to install, deleted after 24 hours.

Test a keyboard, mouse, touchscreen, webcam, microphone, speakers, screen and game controller in your browser. Finds stuck keys, dead pixels and faulty buttons.

Can this PC run Windows 11? Check the processor against Microsoft's lists, plus memory, storage, TPM 2.0, UEFI and Secure Boot, with a read-only PowerShell check.

Is your software still getting security updates? Check Windows, Office, servers, Macs, phones, Linux, PHP and more, see days left and what it means for Cyber Essentials.

Calm first-hour checklists for ransomware, hacked email, invoice fraud, phishing, lost devices and data breaches, with UK reporting contacts, an ICO 72-hour helper and a log.

Plain-English IT policies for UK businesses: passwords and MFA, acceptable use, BYOD, AI, remote working, payment fraud, data handling, backups, incidents, updates and leavers, with a staff sign-off page.

Fake but realistic UK records for testing: names, example.com emails, Ofcom drama phone numbers, real towns and postcode areas, QQ NI numbers and test cards. CSV, JSON or SQL.

QR codes for links, Wi-Fi, contacts and more, in your own colours, as PNG or SVG.

Random v4 and time-ordered v7 UUIDs (GUIDs), plus v1, v6, v3 and v5, one at a time or up to 10,000 at once. Decode any UUID to see its version and time.

Decode certificates and CSRs, check a chain is complete and in order, see if a private key matches, make a new key and CSR, and convert PEM and DER. Runs in your browser.

Format, minify and validate JSON with exact error locations and plain-English fixes, one-click repair, sorted keys, a tree view and big numbers kept exact.

Test JavaScript regular expressions live with highlighted matches, capture groups, replace and split. Every part explained in plain English, plus ready-made UK patterns.

Decode JSON Web Tokens, see every claim explained and when it expires, spot security mistakes and verify HS, RS, PS, ES and EdDSA signatures. Runs in your browser.

Percent-encode and decode URLs and form data, break any link into its parts with an editable query table, spot lookalike domains and build UTM campaign links.

Compare two texts, config files or JSON documents side by side or unified, with changed words highlighted, whitespace and case options, and a .diff or .patch download.

Build and check cron schedules: plain-English explanations, the next 10 run times in any time zone (clock changes handled), and systemd and Windows schtasks equivalents.

Encode text and files to Base64, or decode Base64 back to text, images or files. URL-safe, MIME and data URIs, with file type detection and JWT decoding.

Convert Unix timestamps in seconds, milliseconds or nanoseconds to dates in any time zone and back, plus Excel, Windows and .NET times and whole log files.

Convert HEX, RGB, HSL, OKLCH, CMYK and CSS names, check WCAG 2.2 contrast and get the nearest passing colour, plus tints, shades, harmonies and colour-blind previews.

IPv4 and IPv6 subnets: network, usable range, broadcast and masks with a binary view, plus a subnet splitter, VLSM planner and route summariser.

How much download and upload speed your business or home needs for staff, Teams, Zoom and Meet calls, phone lines, cloud backup and CCTV, and which UK connections fit.

How many access points you need for coverage and for capacity, with a UK channel plan for 2.4, 5 and 6 GHz, PoE and cabling, and UniFi access point suggestions with rough prices.

Will a fibre run work? Add up fibre, connector and splice loss, check it against 1G to 100G optics, and see the margin, received light level, attenuator needs and longest run.

How big a proper 3-2-1 backup with versions really is, the NAS and drives to hold it, cloud storage costs, and whether your internet can upload, keep up and restore in time.

Usable space for RAID 0 to 60, Synology SHR and ZFS RAIDZ, including mixed drive sizes, with how many drives can fail, rebuild time and the risk of a read error during a rebuild.

How much storage your CCTV needs: bitrate per camera, GB a day, total TB and the drives and RAID to hold it, plus a full UniFi Protect planner with recorders, PoE and UK prices.

What your PCs, servers, NAS, network kit and appliances cost to run per day, month and year at the UK price cap, with CO2 and payback on efficient replacements.

How long a file, game, film or backup takes to download or upload at your speed, compared across UK connections, and the speed you need to hit a deadline.

Will a cable run carry the speed and PoE power you need? Check Cat5e to Cat8 against 1 to 40 Gbps, work out voltage drop and power loss, and find the longest run that works.

The right power cable for AC, DC, 12V, solar and three-phase runs: voltage drop rated from excellent to unacceptable, current capacity, cable temperature and fuse size.

Convert between AWG, mm², SWG and kcmil, and measure a cable with calipers, solid or stranded, to find its true size and spot undersized cable.

How long a UPS or power station keeps your router, NAS, PCs and cameras running, now and as the battery ages, with switchover checks and costs compared.