IPv4 Converter

Related

Use Cases

• When learning network protocols, convert dotted IPs to binary to observe subnet mask bitwise operations and understand the division principle between network and host addresses
• When writing firewall ACL rules or routing tables, convert IPs to decimal integers for range matching, or to hexadecimal for packet analysis
• When analyzing network logs, convert decimal or hexadecimal IPs in logs back to dotted format to quickly identify source addresses
• When writing Python/Shell scripts to process IP data, use this tool first to verify conversion results before writing logic into code
• During network operations troubleshooting, compare the same IP in different bases to help diagnose subnet boundary and address conflict issues

How to Use

1. Enter an IPv4 address (dotted decimal format, e.g., 192.168.0.1) or decimal integer (0–4294967295) in the input box
2. The tool automatically detects the input format and completes 4-way conversion in real time — no button click needed
3. View the four result fields: IPv4 (dotted decimal), Decimal (integer), Binary (32-bit), and Hex (8-digit hexadecimal)
4. Click the "Copy JSON Result" button to copy the complete conversion results to your clipboard for use in scripts or documentation

Features

• 4-way conversion: Automatic conversion between dotted decimal, decimal integer, 32-bit binary, and 8-digit hexadecimal — enter once to see all four results simultaneously
• Smart detection: Automatically identifies whether input is a dotted IP or decimal number, enabling bidirectional conversion without format switching
• Range validation: Automatically validates IP legality and decimal integer range (0–4294967295), with instant prompts for invalid input
• Pure client-side calculation: All conversions run locally in the browser with no data sent to any server — zero latency and zero privacy risk
• One-click JSON copy: Copy conversion results in JSON format with one click, convenient for pasting into scripts, config files, or technical documentation

FAQ

Glossary

Dotted Decimal

The most common human-readable IPv4 format, dividing the 32-bit address into four 8-bit groups, each converted to a decimal number 0–255 and connected by dots, e.g., 192.168.1.1.

Decimal Integer

Treating the 32-bit IPv4 address as a single unsigned integer in the range 0–4294967295. Commonly used for database storage (e.g., MySQL's INET_ATON function) and range comparison.

Binary

The raw 32-bit binary representation of an IPv4 address, with 8 bits per octet. Bitwise operations for subnet masks and CIDR prefixes all occur at the binary level.

Hexadecimal

An 8-digit hexadecimal representation prefixed with 0x, where each 2 digits correspond to one octet. Commonly seen in packet capture analysis (e.g., Wireshark) and low-level protocol debugging.

Octet

Each dot-separated 8-bit segment in an IPv4 address is called an octet, with values from 0–255. Four octets make up the complete 32-bit address.

Network Byte Order

TCP/IP protocols specify Big-Endian for transmitting multi-byte data, meaning the most significant byte comes first. The writing order of dotted decimal is consistent with network byte order.

CIDR (Classless Inter-Domain Routing)

A notation using a /prefix length to indicate network bits, e.g., /24 means the first 24 bits are network bits and the last 8 bits are host bits.

Subnet Mask

A 32-bit binary number where network bits are all 1s and host bits are all 0s, used to distinguish the network portion from the host portion of an IP address, e.g., 255.255.255.0.

Wildcard Mask

The bitwise NOT of a subnet mask, where 0 means must match and 1 means ignore. Used in ACL and routing configurations, e.g., 0.0.0.255 corresponds to /24.

INET_ATON / INET_NTOA

Classic function names for IP address-to-integer conversion. ATON (ASCII to Number) converts dotted IP to integer; NTOA (Number to ASCII) does the reverse. Available in MySQL, PHP, and C.

Common IPv4 Address Ranges and Base Comparison

Reserved/Special IPv4 Address Range Quick Reference

Authoritative References

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