When a production outage strikes or DNS propagation stalls, engineers need answers in seconds—not friction. Yet, standard troubleshooting usually requires opening terminal tabs, remembering differing CLI syntax across platforms (dig vs. nslookup, whois vs. rdap), or turning to ad-bloated web diagnostic portals that log your target hostnames and sell threat-intelligence telemetry to third parties.
Today, we are announcing the official launch of the 99tools Network Toolkit—a lightweight, lightning-fast suite of 9 active, browser-based networking diagnostics engineered specifically for systems administrators, DevOps engineers, site reliability teams, and web developers. No signups, zero ad bloat, zero tracking, and instant client-side execution.
Explore the 99tools Network Toolkit
Inspect DNS records, verify SSL certificates, audit HTTP security response headers, and calculate complex CIDR subnet blocks directly in your browser.
The Everyday Network Friction Engineers Face
Modern cloud infrastructures across AWS, GCP, and Cloudflare are distributed and complex. In our technical interviews with sysadmins and web engineers, three systemic pain points consistently surfaced:
- DNS & Propagation Delays: When deploying custom domains, reconfiguring MX records for Google Workspace, or validating TXT verification tags, engineers need raw record feedback immediately. Standard recursive DNS caches on local machines can hold stale TTLs for hours.
- Subnet Bit-Math Mistakes: Designing cloud Virtual Private Clouds (VPCs) or Kubernetes pod CIDR allocations requires precise subnetting. A single miscalculated netmask can exhaust available IP pools or introduce overlapping routing conflicts across peering connections.
- SSL Expiration & Header Vulnerabilities: Expired TLS certificates and missing security headers (such as
Content-Security-PolicyandHSTS) remain among the most common vulnerabilities leading to site downtime, browser security warnings, and compliance penalties.
Privacy-First Architecture: Built for Speed & Security
Unlike legacy network portals that route your queries through remote tracking proxies and log queried target hosts, the 99tools Network Toolkit employs a modern browser-first security model:
Browser-First Diagnostic Pipeline
[ Engineer Input ] (Domain, IP Address, CIDR Mask, Payload)
│
▼
[ Client-Side Engine ] ──────► Local JavaScript Processing
│
├──────► DNS-over-HTTPS (DoH) Direct Resolver (Cloudflare / Google)
├──────► Client-Side 32-bit Bitwise Subnet Math (Zero Remote Latency)
├──────► Raw TLS Certificate & Header Inspection
│
▼
[ Clean Diagnostic UI ] ─────► Instant Results Rendered Without Video Ads or Telemetry
Directory of 9 Active, Production Network Diagnostics
Every tool below is live, responsive, and directly accessible via its unique hash URL. Click any tool to launch its diagnostic workspace:
1. Domain & Routing Diagnostics
-
IP Address Finder (
#ip_finder):
Immediately discover your current public IPv4/IPv6 address, Internet Service Provider (ISP), autonomous system number (ASN), and geographic coordinates with map visualization. -
DNS Lookup Tool (
#dns_lookup):
Query all authoritative DNS records for any domain—including A (IPv4), AAAA (IPv6), MX (Mail Exchange), TXT (SPF, DKIM, DMARC), NS (Nameservers), and CNAME aliases with exact TTL values. -
Whois Domain Lookup (
#whois_lookup):
Retrieve domain ownership, registrar details, registration dates, expiration timelines, and raw RDAP registry status without running terminal commands.
2. Cloud Architecture & Subnet Engineering
-
Subnet Calculator (CIDR & IPv4) (
#subnet_calculator):
Calculate Network IDs, Broadcast Addresses, usable Host ranges, binary netmasks, and total addressable nodes across any CIDR prefix (from /8 down to /32). Essential for AWS VPC and cloud network topology planning. -
Bandwidth & Transfer Time Calculator (
#bandwidth_calculator):
Accurately estimate data migration, backup upload, and file download durations based on payload file size and available network throughput (Mbps/Gbps). -
Base64 Network Converter (
#base64_converter):
Encode and decode Basic Auth headers, raw packet binary data, and web payloads instantly in browser memory without sending credentials over the wire.
3. Security, TLS & HTTP Auditing
-
SSL / TLS Certificate Checker (
#ssl_checker):
Inspect SSL certificate validity, expiration dates, Common Name (CN), Subject Alternative Names (SAN), and root certificate authority (CA) chains to prevent unexpected TLS outages. -
HTTP Response Header Checker (
#http_header_checker):
Inspect live HTTP status codes, server headers, redirect chains (301/302), and crucial security policies includingStrict-Transport-Security,X-Frame-Options, andContent-Security-Policy. -
Port Scanner (Simulated) (
#port_scanner):
Simulate scanning standard networking ports (HTTP 80, HTTPS 443, SSH 22, FTP 21, DNS 53, SMTP 25) to verify firewall rules and open service availability.
Comparison: Traditional Web Portals vs. 99tools Network Suite
| Feature / Criteria | Legacy Network Portals | 99tools Network Toolkit |
|---|---|---|
| Query Privacy | Target domains and IPs are stored, logged, and monetized | Zero-Telemetry (Client-Side execution) |
| Advertising & Clutter | Heavy interstitial banners, popups, and slow scripts | Zero Ads (Clean, high-performance UI) |
| Direct Bookmarkability | Session-locked dynamic query URLs | Clean Hash Routing (e.g., #dns_lookup) |
| Execution Speed | Delayed by server queue queues and anti-bot captchas | Instantaneous (Sub-millisecond local processing) |
| Cost & Limits | Daily query quotas with expensive Pro subscriptions | 100% Free Forever (Unlimited queries) |
Frequently Asked Questions
Does 99tools log the IP addresses or domains I troubleshoot?
No. We do not store or track your queried domains, IP addresses, or network payloads. Bitwise subnet computations and Base64 translations happen entirely on your machine. Queries requiring external lookup (like DNS or WHOIS) query authoritative public DoH resolvers without intermediate storage.
How is the Subnet Calculator calculated without server latency?
Our subnet calculator uses pure client-side 32-bit binary arithmetic. When you type an IPv4 address and change the CIDR slider, the browser instantly computes the bitwise AND operation for the network address, flips bits for the broadcast address, and calculates host boundaries locally in zero milliseconds.
Can I link directly to a specific network diagnostic tool?
Yes. Each of the 9 active tools has its own unique hash link (e.g., https://99tools.in/network-tools/#dns_lookup). You can bookmark these directly in your browser or share them with colleagues during an incident response.
Are there query limits on the DNS and SSL checkers?
No. The 99tools Network Suite is 100% free with no daily caps, no account registration, and no paywalls.
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How to Use 99tools Network Suite: 9 Essential, Client-Side Diagnostics for Sysadmins & Web Engineers in 3-4 Simple Steps
Access Tool
Open the tool workspace on 99tools.
Enter Required Inputs
Provide your input parameters or text in the calculator fields.
Generate Results
Instantly review, copy, or export your processed output.
Frequently Asked Questions
Everything you need to know about this tool, accuracy, formulas, and privacy.
Is this tool free to use on 99tools?
Does this tool store my personal data?
