Convert IPv4 addresses between dotted-decimal, hex, integer, and binary forms. Decode 2130706433 to 127.0.0.1 instantly — local math, free, no signup.
Content reviewed October 2026 · About Toolzum
Decode MessagePack binary into readable JSON structures. Debug compact payloads without hex dumps — local decoding, free, no signup.
Displays your public IPv4 and IPv6 addresses with geolocation data (city, ISP, ASN, timezone). Network engineers use it to verify VPN connectivity. Uses cloud-based processing.
Decode QR codes from uploaded images. Scan any QR code image and extract the embedded text or URL. Point it at screenshots, photos, or documents — decoded URLs and text copy out instantly. Runs locally, free, no signup.
Convert numbers between binary, octal, decimal, and hex with bitwise views. Read 0xFF as 255 instantly — local math, free, no signup.
Convert between Roman numerals and numbers both ways — chapters, clocks, movie credits. Decode MCMXCIV as 1994 instantly — local math, free, no signup.
127.0.0.1 (localhost) as a 32-bit integer — some browsers accept it, which phishers abuse to obscure destinations. Convert to dotted form to see through it.
0x7f.0x0.0x0.0x1 also means localhost — mixed-radix forms bypass naive blocklists. Normalize everything to dotted-decimal before comparing.
IPv4 forms convert fully; IPv6 compresses/expands separately where supported. Link-local and mapped addresses parse explicitly.
No — conversion runs locally in your browser. Nothing leaves your device.
Dotted 192.168.1.1, Integer 3232235777, Hex 0xC0A80101, Binary 11000000.10101000.00000001.00000001 (32 bits grouped per 8), Class C (first octet 192 or higher; 128+ is B, else A), Private Yes (10/8, 172.16-31, 192.168, 127 and 0.0.0.0 all count), CIDR /32 with mask 255.255.255.255.
Subnet Calculator
Compute subnet masks, network/broadcast addresses, and usable host ranges from any CIDR. Plan a /24 office network correctly — local math, free, no signup.
IP Range Expander
Expand an IP address range into a list of individual addresses. Useful for network planning and firewall rules. Code never leaves your device — formatting and validation run locally in your browser.