Wrong number of octets
IPv4 needs exactly four octets.
Fix: Ensure there are three dots and four 8-bit groups.
Binary to IP Converter
Convert four 8-bit binary octets (separated by dots) into a standard dotted-decimal IPv4 address.
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What is Binary to IP Converter
Written by Giorgos Kostas. Last reviewed:
Binary to IP Converter assembles four 8-bit binary octets separated by dots or whitespace into a single dotted-decimal IPv4 address.
It pairs naturally with the IP to Binary tool and is the fastest way to finish subnet exercises and CIDR math without dropping into a calculator.
Why use it
- Finish subnetting and VLSM exercises quickly.
- Validate manual bit arithmetic in the classroom.
- Translate binary snippets from pcap dumps or textbooks.
- Spot-check routing-table entries described in binary.
- Cross-reference firewall rules written as binary masks.
Features
- Accepts both zero-padded and short octets
- Reports the first bad octet clearly
- Runs fully client-side
- Great pair for subnet exercises
- Copy-ready IPv4 output
How to use Binary to IP Converter
- Paste four binary octets. Enter binary octets separated by dots or spaces.
- Read the IPv4. The tool returns the dotted-decimal IPv4 instantly.
- Copy the address. Copy the IPv4 into your subnet worksheet.
Example (before/after)
Binary octets
11000000.10101000.00000000.00000001
IPv4 dotted-decimal
192.168.0.1
Common errors
Non-binary characters
Digits other than 0 or 1 in an octet trigger an error.
Fix: Edit the offending octet so it contains only 0s and 1s.
Wider-than-8-bit octets
Each octet must fit in 8 bits so the value stays below 256.
Fix: Trim the octet to 8 digits by removing leading zeros or fixing a typo.
FAQ
Which separators work?
Dots are preferred, but whitespace is also accepted.
Do I need to zero-pad?
The parser accepts 1-8 bit octets and zero-pads internally.
Does it support IPv6?
No. Use the IPv6 binary tool for 128-bit addresses.
Is this done offline?
Yes. The tool runs in your browser with no uploads.
What if an octet is 300?
Any octet value above 255 is rejected with an error message.
Why does my input fail?
Common causes include fewer than four octets, stray spaces, or non-binary characters.
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