Free Online Tools
Network, Privacy, Security & Developer Utilities 2026
Access 49 free online tools for network diagnostics, IP lookup, privacy testing, browser fingerprinting, SSL checking, DNS lookup, email verification, and developer utilities. Every tool runs directly in your browser — no software downloads, no account required. Built for developers, sysadmins, security researchers, and privacy-conscious users.
Quick Answer: What Tools Does TrustMyIP Offer?
TrustMyIP provides 49 free online tools across 6 categories: Network & IP (IP lookup, port scanner, ping, DNS), Privacy & Fingerprinting (canvas, audio, battery leak, font leak), Browser & System (browser info, hardware, screen, cookies), Domain & Web (SSL, WHOIS, headers, redirects), Email (verifier, temp checker), and Developer (Base64, Hash, JSON, URL encoder). All tools are free, browser-based, and require no installation.
Network & IP Tools
14 tools for IP lookup, port scanning, speed testing, and network analysis.
IP Geolocation
Trace IP to city, ISP, and coordinates.
Reverse IP Lookup
Find all domains on a server IP.
IP Fraud Score
Check fraud risk and abuse probability.
Random Ip Address Generator
Free random IP address generator.
IP to Binary
Convert IPv4 to binary notation.
IPv6 Expansion
Expand compressed IPv6 to full form.
Cloud IP Check
Detect AWS, GCP, or Azure IPs.
Ping Test
Measure latency to any server.
Port Scanner
Scan for open ports and vulnerabilities.
MTU Test
Find maximum transmission unit size.
CIDR Calculator
Calculate IP ranges from CIDR notation.
Subnet Calculator
Generate subnet masks and IP ranges.
Speed Test
Measure download and upload bandwidth.
MAC Address Lookup
Identify hardware vendor from MAC.
Tor Exit Detector
Check if an IP is a Tor relay node.
ASN Lookup
Find which network owns an IP or domain.
ASN IP Ranges
Every CIDR block an AS announces, ready to export.
Privacy & Fingerprinting Tools
10 tools to audit browser fingerprinting, tracking leaks, and privacy exposure.
IP Blacklist Check
Check if your IP is blacklisted.
JA3 TLS Fingerprint
Detect your SSL/TLS client signature.
Battery Leak Test
Check if Battery API leaks data.
Canvas Fingerprint
Detect GPU-based canvas tracking.
Audio Fingerprint
Analyze audio processing signature.
Font Leak Tester
See which fonts your browser exposes.
Timezone Audit
Detect timezone vs IP mismatches.
Referrer Leak Test
Check if referrer URLs are leaked.
EXIF Data Remover
Strip location metadata from photos.
Browser Leaks
Comprehensive browser leak audit.
Browser & System Tools
5 tools to inspect browser details, hardware specs, display info, cookies, and WebRTC leaks.
Domain & Web Infrastructure
5 tools for DNS records, WHOIS lookup, SSL certificates, HTTP headers, and redirect tracing.
Email Intelligence
Four tools for the questions email raises: is an address real, is the domain disposable, where did a message actually come from, and does the sending domain publish a policy that receivers will honour.
Security & Developer Utilities
8 tools for encoding, hashing, formatting, password generation, and security checks.
Password Generator
Cryptographic random passwords.
Base64 Encoder
Encode and decode Base64 strings.
Hash Generator
MD5, SHA-1, SHA-256, SHA-512.
JSON Formatter
Validate, format, and minify JSON.
Punycode Converter
Convert IDN domains to Punycode.
URL Encoder/Decoder
Encode and decode URL strings.
Proxy Checker
Detect proxy and VPN usage.
Deep IP Scan
Run every IP check on one address in a single pass.
Robert Harrison
OSINT & Network Utility Expert
Robert manages TrustMyIP's 49-tool ecosystem, specializing in network diagnostics, OSINT techniques, privacy analysis, and developer utilities. Each tool is tested for accuracy, speed, and security compliance.
View All ArticlesWhy Use Free Online Tools for Network and Privacy Analysis?
Every time you connect to the internet, your device shares data with hundreds of servers — your IP address, browser fingerprint, hardware specs, screen resolution, installed fonts, and even battery level. Most people have no idea how much information leaks from their browser. That is exactly why free online tools matter.
Our 49 network tools and privacy tools let you see exactly what websites see about you. Instead of installing desktop software or browser extensions (which add their own tracking), our tools run directly in your browser. Enter a domain, click a button, and get instant results. Whether you are troubleshooting a DNS issue, checking if your VPN is actually hiding your IP, or auditing your site's SSL certificate before launch, the right tool is one click away.
All 49 Tools Are Free: No accounts, no subscriptions, no hidden limits. Developer tools like the Hash Generator, JSON Formatter, and Base64 Encoder run entirely client-side — your data never touches our servers.
Network & IP Tools: Diagnose Connectivity Issues Fast
Network problems are frustrating because they are invisible. Your website might be down because of a DNS misconfiguration, a blocked port, or a blacklisted IP — and you cannot tell which one without the right diagnostic tool. Our network tools category includes 14 utilities that cover every layer of network analysis.
Start with IP Geolocation to verify your public IP and location, then follow the address up into the routing layer: the ASN Lookup tells you which autonomous system announces it and who to contact about abuse, and ASN IP Ranges exports every block that network announces in iptables, nftables, nginx or Cisco syntax when you need to allow or block the whole operator rather than one address. Use DNS Lookup to check A, MX, and CNAME records. Run the Port Scanner to find open ports that could be security risks. Test your connection quality with Speed Test and Ping. For advanced users, the CIDR Calculator and Subnet Calculator handle IP range planning.
If you are dealing with email deliverability issues, check your IP against blacklists with our Blacklist Check tool. Read our IP reputation score guide and our fix 550 RBL blocked sender guide for step-by-step solutions.
Privacy & Fingerprinting Tools: Know What Trackers See
Modern tracking goes far beyond cookies. Websites can identify your device using browser fingerprinting — a technique that combines your GPU model, audio processing, installed fonts, screen resolution, and dozens of other hardware details into a unique identifier. Our privacy tools expose exactly what trackers can see.
The Canvas Fingerprint tool shows how your GPU renders text differently from every other device. Audio Fingerprint reveals your audio processing signature. Battery Leak Test checks if your exact battery percentage is being used as a tracking identifier. The Font Leak Tester shows which installed fonts your browser exposes to websites.
Use these tools together for a complete privacy audit. Start with Browser Leaks for a comprehensive overview, then drill into specific tests. Read our digital footprint guide for practical steps to reduce your tracking exposure.
Browser & System Tools: Full Device Audit
Your browser reveals a surprising amount about your device. Our Browser Info tool detects 25+ data points including User-Agent, WebRTC leak status, canvas hash, and Do Not Track setting. The Hardware Info tool reads your GPU vendor and model via WebGL, CPU cores, RAM estimate, and battery status.
Check your display with the Screen Resolution Checker — it detects resolution, DPR, aspect ratio, refresh rate, and includes a dead pixel test. Audit your cookies with the Cookie Checker, which categorizes cookies as necessary, analytics, or marketing and lets you delete them individually. Test for WebRTC IP leaks with the WebRTC Probe — essential if you use a VPN.
Domain, Email & Developer Tools: Professional Utilities
Our SSL Checker verifies certificate validity, expiration, and trust chain — essential before launching any website. The Headers Analyzer inspects HTTP security headers like HSTS, CSP, and X-Frame-Options. Verify domain ownership with WHOIS Lookup and trace redirect chains with the Redirect Checker.
Email is where the ground moved most in the last year. Gmail replaced deferrals with permanent rejections for non-compliant bulk mail in November 2025, Outlook applied its own hard refusal the same month, and in May 2026 the IETF published RFC 9989 and its companions, which replace the original DMARC specification from 2015. A domain that was merely untidy in 2024 can now have its mail refused outright.
Four tools cover the questions that raises. Verify an address before you send to it with the Email Verifier, and keep throwaway signups out with the Temp Email Checker. When a message has already arrived and you need to know whether it is genuine, the Email Header Analyzer reconstructs the delivery path, marks which hops can be trusted, and works out SPF, DKIM and DMARC alignment itself rather than reprinting the receiving server’s verdict. And to check your own domain before enforcement bites, the DMARC Checker validates the published record against RFC 9989, including the np tag that closes the non-existent-subdomain gap.
For the reputation side of deliverability, read our IP reputation for bulk email and cold emailing guide.
Developer utilities include Base64 Encoder, Hash Generator (MD5/SHA-256/SHA-512), JSON Formatter, Punycode Converter, URL Encoder, and Password Generator. All run client-side for maximum security.
Which Tool Do You Need? Start From the Symptom
Most people arrive here with a problem rather than a tool name. Find the line that matches what is actually happening and start there.
| What you are trying to do | Start here | Category |
|---|---|---|
| My site is down and I do not know why | DNS Lookup | Domain |
| Find my public IP and where it resolves to | IP Geolocation | Network |
| Check whether my VPN is actually hiding me | WebRTC Leak Test | Privacy |
| See everything my browser gives away | Browser Leaks | Privacy |
| My email is landing in spam | Blacklist Check | Network |
| Work out why a message failed authentication | Email Header Analyzer | |
| Check whether my domain will survive DMARC enforcement | DMARC Checker | |
| Find out who owns an IP address | ASN Lookup | Network |
| Block or allow an entire network in a firewall | ASN IP Ranges | Network |
| Verify an email address before sending to it | Email Verifier | |
| Filter disposable addresses out of a signup form | Temp Email Checker | |
| Confirm a certificate before launch | SSL Checker | Domain |
| Audit HTTP security headers | Headers Analyzer | Domain |
| Find open ports on a host | Port Scanner | Network |
| Diagnose a slow or dropping connection | Ping Test | Network |
| Fix large uploads that stall halfway | MTU Test | Network |
| Plan an addressing scheme | Subnet Calculator | Network |
| Check whether an address belongs to a cloud provider | Cloud IP Check | Network |
| Trace a redirect chain | Redirect Checker | Domain |
| Format or validate an API response | JSON Formatter | Developer |
Working through a real fault, in order: confirm what the outside world sees with DNS Lookup, check the certificate with the SSL Checker, confirm the port is actually open with the Port Scanner, then measure the path with Ping. Four checks in that order rule out most of what breaks a site.
Frequently Asked Questions
Which tool tells me why my email is going to spam?
Three, in order. Start with the DMARC Checker to confirm your domain publishes a policy receivers will honour, and that your reporting address will actually receive anything. Then check whether the sending address has picked up a bad reputation with the Blacklist Check. If a specific message was rejected, paste its headers into the Email Header Analyzer, which reads the spam filter’s own score out of the X-headers and usually names the reason outright.
How do I block an entire hosting provider rather than one IP?
Look the address up with the ASN Lookup to find the autonomous system that announces it, then feed that AS number into ASN IP Ranges. It returns every block the network announces and exports them in iptables, ipset, nftables, nginx, Apache, Cisco, MikroTik or pfSense syntax, with adjacent blocks merged so the rule count stays manageable.
Do any of these tools need a download or an account?
No. Every tool runs in the browser at the URL you visit. Several of them — the header analyzer, the hash generator, the JSON formatter, the Base64 encoder and the fingerprint tests — never send your input anywhere at all; the work happens in the page. Where a tool does need an external lookup, such as DNS or WHOIS, the page says so.
Which tools were added most recently?
Four, all in 2026: ASN Lookup and ASN IP Ranges for the routing layer, and the Email Header Analyzer and DMARC Checker for email authentication. The last of those validates against RFC 9989, published in May 2026, rather than the 2015 specification most checkers still use.
Q Are all 49 tools completely free?
Yes. Every tool on TrustMyIP is free with no account, no subscription, and no hidden usage limits. Developer tools like Hash Generator, JSON Formatter, and Base64 Encoder run entirely in your browser — your data never leaves your device.
Q Is my data safe when using these tools?
Privacy is our core principle. Client-side tools (browser info, hardware, screen, cookie checker, hashing, encoding) process everything locally. Server-side tools (DNS, WHOIS, SSL) send only the domain you enter — never your personal data. We do not log queries or sell data.
Q Which tools should I use for a VPN leak test?
Start with IP Geolocation to check your visible IP. Then run WebRTC Leak Test to see if your real IP leaks through WebRTC. Also check DNS Lookup for DNS leaks and Timezone Audit for timezone mismatches.
Q Can I use these tools on mobile devices?
Yes. All 49 tools are fully responsive and work on iPhone, Android, iPad, and any mobile browser. Some hardware features (like battery API or WebGL) may have limited availability on certain mobile browsers, but the tools gracefully handle these differences.
Q How do I run a complete privacy audit?
Follow this order: Browser Info → Hardware Info → Canvas Fingerprint → Audio Fingerprint → Cookie Checker → WebRTC Leak → IP Fraud Score. This covers your browser fingerprint, hardware leaks, cookie tracking, and IP reputation.
49 Free Online Tools — Always Available
No Account, No Limits, No Downloads
From IP lookup and DNS diagnostics to browser fingerprinting and developer utilities — everything you need for network security, privacy testing, and web development in 2026.