Small tools.Clear answers.
Fast utilities for browsers, DNS, email, public IP addresses, images, documents, and the infrastructure behind them.
Privacy-minded
Each tool processes only the information needed to return its result.
Focused results
Every tool is designed to answer one question clearly.
Useful by default
No account is required for the free tools in this directory.
Email infrastructure
MX Checker
Check whether a domain can receive email, inspect its MX hosts, and identify the mail provider.
Text processing
Email Extractor
Find exact unique email addresses in pasted content or text files, then filter, copy, or download them.
Network information
What Is My IP?
Find your public IPv4 or IPv6 address, approximate location, provider, and ASN.
Browser information
What Is My Browser?
Identify your browser, version, engine, operating system, device, and common capabilities.
Browser information
Browser Size
Measure your live viewport, browser window, screen, pixel density, and responsive breakpoint.
DNS lookup
Domain to IP
Resolve a domain into its current IPv4 A and IPv6 AAAA records through redundant DNS providers.
Authoritative DNS
DNS Zone Lookup
Query authoritative nameservers for live A, CNAME, TXT, SPF, DKIM, and NS records.
Website security
SSL Verification
Verify certificate trust, hostname coverage, validity dates, issuer, and subject identities.
Reverse DNS
IP to Domain
Find the PTR hostname published for a public IPv4 or IPv6 address.
Network diagnostics
IPv4 & IPv6 Ping
Send four ICMP requests and see response time, individual replies, and packet loss.
Web development
HTML Editor
Write HTML, CSS, and JavaScript with a sandboxed live preview, responsive sizes, and one-file export.
Image processing
Image Resizer
Resize JPG, PNG, or WebP images with exact dimensions, aspect-ratio locking, and quality controls.
PDF workflow
Merge PDF
Arrange and combine up to 20 PDFs, preview the final document, and keep vector pages sharp.
Document editing
PDF Editor
Reorder, rotate, remove pages, and add sharp text or watermarks without rasterizing the PDF.
