Web tools
Free online web tools for Developers.
Tools.viweb.net provides fast browser-based utilities for JSON formatting, DNS lookup, SSL and redirect checks, encoding, timestamps, password generation, QR codes, email security, cloud reference data, and everyday website troubleshooting. The previous static version is preserved at /v1/ for compatibility.
Networking Tools
Display IPv4 & IPv6
See your current public IPv4 and IPv6 addresses with connection details.
DNS Lookup
Query DNS records for a domain and inspect the returned values.
Redirect Checker
Follow URL redirects and review each HTTP status in the chain.
SMTP Tester
Test SMTP connection settings and diagnose mail server responses.
IP Checker
Look up location, ASN, and network details for an IP address.
Whois Lookup
Look up domain registration and nameserver information.
Security Tools
SSL/TLS Checker
Check certificate validity, issuer, dates, and TLS configuration for a host.
Password Generator
Generate strong random passwords with configurable length and character sets.
Hash Generator
Create common hashes from text for checksums and verification.
Self-hosted SSL Generator
Create self-signed certificates for local and self-hosted testing.
CSR Generator
Generate certificate signing requests and private keys for SSL issuance.
Email Security Checker
Check SPF, DKIM, and DMARC records for email authentication health.
SSH Key Generator
Generate SSH key pairs for secure server authentication.
Text and Data Tools
Base64 Encoder/Decoder
Encode plain text to Base64 or decode Base64 back to readable text.
URL Encoder/Decoder
Escape or unescape URL text for query strings, paths, and forms.
Text Diff Checker
Compare two text blocks and highlight what changed.
JSON Formatter & Validator
Format, validate, and inspect JSON with readable indentation.
Utility Tools
Slug Generator
Turn titles or phrases into clean URL-friendly slugs.
Random Number Generator
Generate random numbers across a chosen range and quantity.
Timestamp Converter
Convert Unix timestamps and human-readable dates across formats.
UUID Generator
Generate UUIDs for identifiers, fixtures, and development workflows.
Sitemap URL Extractor
Extract URLs from XML sitemaps for audits, crawls, and exports.