Network Tools Hub

SSL Certificate Check

Inspect SSL/TLS certificate validity, issuer, and security configuration

HTTP Header Checker

Inspect a URL's HTTP/HTTPS response headers, redirect chain, and security configuration

HTTP Protocol Support Test

Detect which HTTP versions a site supports — HTTP/1.1, HTTP/2 (ALPN), and HTTP/3 (Alt-Svc advertisement)

WHOIS Lookup

Query domain registration details, registrar, and expiry date

ICP Filing Check

Check China ICP (Internet Content Provider) filing status for a domain

IP Geolocation

Look up IP address geolocation, ASN, and ISP information

IP Reputation / Risk

Risk score and type labels for an IP (proxy / VPN / hosting / Tor)

TCP Port Test

Test TCP port reachability and response time from multiple global nodes

MTR Test

Combined ping and traceroute — multi-pass hop measurements visualized on a path map

SMTP Test

Test SMTP mail server connectivity

Reverse DNS Lookup

Look up the reverse DNS (PTR record) hostname for an IP address

ASN Lookup

Look up the autonomous system, ISP, and country for an IP address or AS number

MX Record Lookup

Look up MX mail exchanger records for a domain, showing mail server priority and hostname

SPF Record Lookup

Look up the SPF (Sender Policy Framework) record for a domain and verify mail send authorization

DMARC Record Lookup

Query the DMARC policy record for a domain and check email authentication configuration

NTP Test

Test NTP time synchronization server

UDP Port Test

Send a UDP datagram to a host:port and check for a reply

WebSocket Test

Perform a WebSocket handshake against a ws:// or wss:// endpoint

DKIM Record Lookup

Query the DKIM (DomainKeys Identified Mail) signing record for a domain

Email Blacklist Check

Check whether an IP or domain is listed on common DNSBL email blacklists

BGP Route Lookup

Look up BGP routing information for an IP address, including prefix and AS path

IP WHOIS Lookup

Look up the RIR record for an IP — network range, owner, and abuse contact

CDN / WAF Fingerprint

Detect the CDN and Web Application Firewall in front of a site from its response headers

Speed Test

Test network download and upload bandwidth

DNS Lookup

Global DNS resolution with DNS pollution detection across multiple resolvers

DNS Propagation Checker

Check whether a DNS change has taken effect across China and worldwide, node by node, and watch it converge in real time.

DNSSEC Check

Validate a domain's DNSSEC chain of trust: DS/DNSKEY/RRSIG, signing algorithms, expiry, and trust status

Ping Check

Global multi-node ICMP ping from multiple regions — measure latency and packet loss

Realtime Ping Dashboard

Multiple nodes continuously Ping / TCPing a target, plotting live latency curves and packet loss per location — a screenshot-friendly big-screen view

HTTP Check

Multi-region HTTP/HTTPS connectivity test — verify uptime and response times worldwide

TCP Ping

Test TCP port reachability and response time from multiple global nodes (TCPing)

Traceroute

Trace the network path and each hop from global nodes to your target

Network Diagnostics

One-click comprehensive network diagnostics — automatically detect common issues

Domain Combo Bulk Lookup

Combine number, letter, pinyin and word slots to bulk-generate candidate domains and stream-check which are available.

Email health score

One-click check of a domain's SPF, DMARC, DKIM and MX configuration, with a weighted overall score and recommendations.

Security score

One-click check of a domain's SSL certificate, security headers and DNSSEC, with a weighted overall score and recommendations.

CSR Generator

Generate a CSR and private key online — fully in your browser, key never uploaded

Certificate Decoder

Decode SSL/TLS certificates and CSRs online — paste PEM or upload, fully in your browser

Certificate Format Converter

Convert certificates between PEM, DER, PKCS#12/PFX and PKCS#7/P7B — fully in your browser

Certificate / Private Key Match Checker

Check whether an SSL/TLS certificate or CSR and a private key belong together — entirely in your browser

Certificate Chain Checker

Paste one or more certificates to order them leaf → intermediate → root, verify each link and flag gaps and expiry — fully in your browser

Key Pair Generator

Generate an RSA or EC key pair in your browser and export PEM private and public keys — fully local, private key never uploaded

Self-Signed Certificate Generator

Generate a self-signed X.509 certificate and a fresh private key in your browser — the key is never uploaded

AES Encrypt / Decrypt Online

Encrypt and decrypt text with AES-256-GCM using a password-derived key (PBKDF2) — entirely in your browser

JSON Formatter

Format, minify, and validate JSON with syntax highlighting

YAML Formatter

Format, validate, and beautify YAML documents

XML Formatter

Format, validate, and beautify XML documents

URL Encoder / Decoder

Encode or decode URL-encoded strings

Unicode Converter

Look up Unicode characters and convert between code points and glyphs

JWT Decoder

Decode and inspect JWT headers, payloads, and signatures

Regex Tester

Live regular expression testing with match highlighting

Cron Expression Parser

Parse and visualize cron schedule expressions

CIDR Calculator

Calculate subnet masks, host ranges, and broadcast addresses

IPv6 Check

Validate, expand, and compress IPv6 addresses with format conversion

Color Converter

Convert colors between HEX, RGB, HSL, OKLCH formats

Markdown Preview

Edit Markdown with a live rendered preview

Text Diff

Compare two text blocks line by line

Word Counter

Count words, characters, lines, and paragraphs in text

Password Generator

Generate strong random passwords and passphrases

UUID Generator

Generate UUID v1/v4/v7 and Nanoid in bulk

Number Base Converter

Convert numbers between binary, octal, decimal, hex, Base32, and Base36

Text Case Converter

Convert text between camelCase, snake_case, PascalCase, and more

HTML Entity Encoder

Encode and decode HTML entities

Data Format Converter

Convert between JSON / YAML / XML / CSV

URL Parser

Parse URL components and edit query parameters

User-Agent Parser

Parse User-Agent strings to identify browser, OS, and device

HTTP Status Codes

Look up HTTP response status code meanings

MIME Type Lookup

Look up MIME types for file extensions

Timezone Converter

Compare times across global timezones

Date Calculator

Date differences, offsets, and date info

Image to Base64

Convert images to Base64-encoded Data URLs

CSV Formatter

Parse and display CSV data as a table

Number Formatter

Format numbers with thousands separators, currency styles, and custom decimal places

Lorem Ipsum Generator

Generate Lorem Ipsum or Chinese placeholder text

Line Sorter

Sort text lines in ascending or descending order

Duplicate Line Remover

Remove duplicate lines from text, keeping only unique lines

Text Statistics

Word frequency, character frequency, and text analysis

HTML Escape

Safely escape HTML content

chmod Calculator

Visualize and calculate Unix file permissions

JSON Key Sorter

Sort JSON object keys alphabetically

QR Code Generator

Create QR codes for URLs, text, or contact info

Timestamp Converter

Convert Unix timestamps to readable dates and back across any timezone

Base64 Encoder/Decoder

Encode or decode Base64 strings and files online

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes

Report Diff

Paste two report IDs or share URLs to see a structured, field-level diff of their key metrics — what stayed the same and what changed.