Technical Resource Center

Calculate subnets, valid host ranges, masks and broadcasts from any CIDR block. Essential for segmenting networks and avoiding addressing conflicts.

Design VLSM schemes optimizing address space based on the actual number of hosts per segment. Ideal for multi-VLAN or multi-site networks.

Measure real available bandwidth from the browser without installing software. Useful for validating provider SLAs and detecting network bottlenecks.

Evaluate latency and host availability via HTTP from your browser. A quick first diagnosis before escalating to deeper analysis tools.

Query DNS records (A, MX, TXT, NS), domain ownership and expiration dates. Key for audits and external infrastructure verifications.

Convert between speed units (Mbps, MB/s, Gbps) and calculate real transfer times. Simplifies sizing and bandwidth comparison.

Verify whether a TCP/UDP port is open or filtered from the internet. Useful for auditing firewalls, ACLs and perimeter access policies.

Identify the autonomous system (ASN), announced prefixes and owner organization of any IP address. Essential for route analysis and transit provider evaluation.

Inspect HTTP response headers in real time: Content-Security-Policy, HSTS, X-Frame-Options and more. Quick security and web server configuration audit.

Validate the SSL/TLS certificate of any domain: trust chain, algorithms, active protocols and expiration date. Avoid outages due to expired certificates.

Decode X.509 certificates in PEM format directly in the browser and extract SANs, issuer, validity and extensions — without sending the file to any external server.

Verify syntax, active MX records and basic reputation of an email address. Reduces bounces and detects temporary domains or those with bad reputation.

Generate high-entropy passwords with length, special character and custom exclusion options to meet internal security policies.

Encode and decode Base64, URL encoding, HTML entities, Hex and JWT in one place. Reference tool for token analysis and secure development.

Compare two text blocks with a visual line-by-line diff. Useful for detecting changes in configurations, network scripts or deployment files between versions.

Format, minify, validate and navigate JSON structures with an interactive tree. Speeds up review of API configurations, webhooks and deployment files.

Build and test regular expressions in real time with group highlighting and references. Reduces errors when writing patterns for filters, parsers and log analysis.

Generate QR codes for URLs, WiFi networks, vCards and free text, directly in the browser. Useful for technical signage, quick portal access and physical documentation.

Generate unique UUID v4/v7 and ULID identifiers with cryptographic entropy. Includes a decoder to extract the timestamp embedded in ULIDs and v7 UUIDs.