Application identifiers
UUID Generator offers v4 and v7. Choose randomness or time ordering for your use case, and keep identifiers separate from authentication secrets.
Online Developer Tools
Use a focused utility to inspect bytes, create identifiers or exercise a network-related field. A value with the right shape is not proof that a device, host or registered manufacturer exists.
Tools in this category
Search all tools →MAC Address Generator
Generate random MAC address test data in four formats, choose address flags and inspect MAC addresses.
DeveloperHex to Text Converter
Convert hexadecimal to text and text to hex online. Strict ASCII and UTF-8 support, byte counts and browser-local processing.
DeveloperIMEI Generator
Generate 15-digit IMEI test numbers with valid Luhn checksums and check IMEI format. Synthetic samples for developers and QA.
DeveloperIP Lookup
Find your public IP address and look up approximate location, ISP and network details for IPv4 and IPv6.
DeveloperUUID Generator
Generate random v4 or time-based v7 UUIDs.
DeveloperWhich tool fits your task?
Text and bytes
Hex to Text Converter supports strict ASCII and UTF-8 in both directions. An invalid byte sequence should produce an explicit error instead of silently changing data.
Device-shaped fixtures
MAC and IMEI generators create synthetic format samples. MAC flags and IMEI check digits describe a format, not ownership or registration.
Public network information
IP Lookup provides approximate network information with provider and privacy notes. IP-derived location is not a precise address.
A useful workflow
- 01
Choose a field or format and record its expected behavior.
- 02
Use a valid example and one targeted malformed input.
- 03
Save the input, configuration and expected result with your regression test.
Worked example
UTF-8 round trip Input text: café Hex bytes: 63 61 66 c3 a9 Expected: decoding in UTF-8 returns café Negative case: an incomplete c3 byte must not silently become another character