Tools

Estimate transfer time from file size, connection speed, and efficiency.

Calculate IPv4 networks, host ranges, and subnet masks.

Look up the public address used by your browser connection.

Generate strong, random passwords on your device.

Calculate allowed downtime per day, week, month, and year.

Query public PTR records for an IPv4 address.

Convert Mbps, Gbps, and bytes per second.

Estimate transfer volume from bitrate, time, and daily usage.

Calculate actual availability from a period and downtime.

Compare two hexadecimal digests without uploading them.

Check IPv6 address syntax, including compressed notation.

Inspect local address ranges, binary notation, and historical IP classes.

Convert a contiguous subnet mask or prefix into network and wildcard masks.

Count addresses between two inclusive IPv4 endpoints.

Look up OSI layers, VLAN ranges, common MTUs, and port ranges.

Calculate SHA-256, SHA-384, or SHA-512 digests.

Validate IPv4 addresses and identify private ranges.

Normalize MAC addresses into common formats.

Look up common service ports and transport protocols.

Generate a random 256-bit hexadecimal token locally.

Escape text for safe inclusion in HTML text content.

Query public DNS records through Google Public DNS.

Follow a guided sequence to isolate connection problems.

Calculate SHA-256 for a local file without uploading it.