Developer & Sysadmin Tools

My IP Address

See your public IP address, hostname, and current connection details.

IP Lookup

Find the hostname, organization, and network range of any IP address.

Uptime Checker

Check whether a website is online or offline, with real-time response times.

DNS Lookup

View A, AAAA, MX, TXT, NS, CNAME, and SOA records for any domain.

WHOIS Lookup

Check domain registration details: owner, registrar, expiry date, and nameservers.

Reverse DNS Lookup

Find the hostname (PTR record) behind an IP address.

MAC Address Lookup

Identify a device's vendor/manufacturer from its MAC address using the OUI prefix.

Ping & Traceroute

Test connectivity and trace the network route to a host or domain.

Port Scanner

Check whether common ports on a host are open or closed.

Subnet Calculator

Calculate the network address, broadcast, subnet mask, and host count from a CIDR.

DNS Leak Test

See which DNS resolvers your browser is actually using right now.

SSL Checker

Check the validity, expiry date, and chain of a domain's SSL/TLS certificate.

Security Headers Checker

Analyze HTTP security headers (CSP, HSTS, X-Frame-Options, etc.) on any URL.

Mixed Content Checker

Find HTTP resources loaded on HTTPS pages (the cause of browser warnings).

Password Breach Checker

Check whether a password has appeared in public data breaches, without sending the actual password.

CSR Generator

Create a Certificate Signing Request (CSR) and private key for your SSL application.

Certificate Decoder

Read the contents of an SSL/TLS certificate (PEM) - subject, issuer, validity, SAN.

JWT Decoder

Decode the header and payload of a JSON Web Token without sending it to a server.

JWT Generator

Create and sign JSON Web Tokens (HMAC) right in your browser.

Hash Generator

Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes of any text.

Hash Verifier

Compare a text/file against a hash value to verify its authenticity.

Email Health Checker

Check the SPF, DKIM, DMARC, and MX records of your email domain.

BIMI Validator

Validate your BIMI record and SVG logo to display your brand in email inboxes.

HTTP Header Viewer

View every HTTP response header a server sends back.

Redirect Checker

Trace a URL's redirect chain (301/302) from start to final destination.

Open Graph Previewer

Preview how a link looks when shared on social media, based on Open Graph meta tags.

SEO Analyzer

Run a quick on-page SEO audit: title, meta description, headings, and images.

Robots.txt Generator

Build a robots.txt file with allow/disallow rules per user-agent.

.htaccess Generator

Generate .htaccess snippets for redirects, forcing HTTPS, and directory protection.

Web Server Config Generator

Create ready-to-use Nginx or Apache virtual host configs from a simple form.

JSON Validator & Formatter

Validate JSON syntax and prettify or minify it in one click.

Regex Tester

Test regular expressions against text with live match highlighting.

Base64 Encoder/Decoder

Encode and decode text to and from Base64.

URL Encoder/Decoder

Encode and decode strings so they are safe to use as part of a URL.

HTML Entities Converter

Convert special characters to and from HTML entities (&, <, >, etc.).

Case Converter

Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.

SQL Formatter

Turn messy SQL queries into clean, readable formatting.

Text Diff Checker

Compare two blocks of text and see the differences line by line.

JSON Diff Checker

Compare two JSON structures and see which keys/values differ.

Markdown Previewer

Write Markdown and see the rendered HTML live.

Data Format Converter

Convert data between JSON, CSV, and YAML formats.

Cron Job Generator

Build cron expressions for the schedule you want using a simple form.

Cron Expression Humanizer

Translate cron expressions into plain, human-readable sentences.

Unix Timestamp Converter

Convert Unix timestamps to dates and back, with timezone support.

UUID Generator

Generate as many random UUID v4 values as you need.

Word Counter

Count the words, characters, and sentences in a text, plus estimated reading time.

PHP-FPM Calculator

Calculate the optimal PHP-FPM pm.max_children setting based on your server's RAM.

Password Generator

Generate strong random passwords with a custom length and character mix.

QR Code Generator

Create QR codes from text, URLs, or contacts and download them as images.

Data Size Converter

Convert data sizes between bits, bytes, KB, MB, GB, and TB.

Binary/Hex/Decimal Converter

Convert numbers between binary, octal, decimal, and hexadecimal.

Color Converter

Convert color codes between HEX, RGB, HSL, and CMYK.

Image Format Converter

Convert images between PNG, JPEG, and WebP right in your browser.

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text by words, sentences, or paragraphs.