10 Best Ethernet Cable Tester of August 2025

• Cable tester with single button testing of RJ11, RJ12 and RJ45 terminated voice and data cables
• Tests CAT3, CAT5e and CAT6/6A cables
• Fast LED responses indicate cable status (Pass, Miswire, Open-Fault, Short-Fault, and Shield)
• Test remote stores securely in tester body
• Compact tester easily fits in your pocket

Klein Tools

• Cable tester tests voice (RJ11/12), data (RJ45) and video (coax F-connector) terminated cables with clearly defined results
• Measure cable length up to 2000 feet (610 m)
• Test for Open, Short, Miswire or Split-Pair faults
• Backlit LCD screen displays cable length, wiremap, cable ID and test results
• Trace cables, wire pairs and individual conductor wires with multiple style tone generator (requires analog probe Cat. No. VDV500-123; sold separately)

Klein Tools

• Automatically runs all tests and checks for continuity, open, shorted and crossed wire pairs. Visible LED status display.
• Cable state testing (2-wire): Line DC detecting, anode and cathode determination,Ringing signal detecting open, short and cross circuit testing
• Cable Type: RJ11 Telephone cable and RJ45 LAN cable
• Connectors: Ethernet Cat 5, Ethernet Cat 5e, Ethernet Cat 6, Ethernet Cat 7, RJ11 6P and RJ45 8P
• Power Source: DC9V Battery Required (not included)

iMBAPrice

• Cable tester tests the continuity of twisted pair data wiring (RJ45) connections
• Displays wire map
• Easy to use, compact tool saves time and money on the job
• Dual function button- operates test functions and tone generator
• Large display for easy identification

Klein Tools

• 100% new network tester, with LED lights and micro-power supply interface.
• Keep your network running smoothly by testing your cables to uncover problematic shorts, open wires, crossing pairs and other wiring mishaps.
• Use for testing your homemade Ethernet patch cables to make sure they are in working order prior to connecting to your devices.Tests RJ45 cables, RJ11 telephone cables and network cables.
• Easy to read LED display indicates problems.Hand-held for portability.
• Requires one 9-volt battery (not included).Battery is advised to change if any weak light appears.Or through the micro-port power work.

Optimal Shop

• Professional Wire Tracker. It can help you quickly find the target line in many pairs. It is suitable for tracking RJ45 internet cable, RJ11 telephone line and other metal wire in low electricity. Please note that it can not be used to track wires with high electricity ( maximum currents for emitter and receiver are 10mA and 30mA respectively, and maximum voltage is 10V ). Besides, you may need two 9V laminated cells, which are NOT included in the packaging of this item.
• Network Cables Verifying. Plug one side of the cable into the emitter and the other side into the receiver. Select "Network" to check and verify whether the network cables are good or not. No need of network tester.
• Wire Tracking. It can trace not only Ethernet LAN wires, but also electrical and speaker wires when connecting to the alligator clip. In this situation, the wires must be in power-off status, otherwise the units will be damaged. It is recommended to stripe down some of the wires when connecting through the clip. Select "SCAN". Emitter works properly if the "SCAN" indicator is on. Use the receiver to find target wires. No need of multi-testers.
• Telephone Line Test. The work of the telephone line of the detection of various states, only the transmitter can be detected, such as determining TIP or PING line, to determine the work of the telephone line idle, ringing and off-hook state.
• Additional Earphone & Equipped Lamp. In a noisy environment, you can put on the earphones to accurately find the target cable through comparing the strength of "beep beep" sound. Adjust the volume knob to make the volume proper and avoid being interfered. At night or in a dark environment, you can turn on the illuminating lamp, which can be helpful during operating.

ELEGIANT

• ACCURATELY CHECK CABLES & PORTS: The comprehensive cable tester for network professionals allows you to accurately check pin configurations for Ethernet cables, USB cables (with TC-NTUF sold separately), BNC cables, and patch panel ports.
• CABLE TESTING DISTANCE: Tests over cables lengths of up to 300 meters (984 ft.)
• PIN TESTING: The network cable testers identifies proper, severed, short circuit, and cross connected pins.
• LOCAL & REMOTE TESTING: A transmitter unit facilitates loop testing and a receiver unit allows for cable testing in locations away from the transmitter unit
• TRANSMITTER INTERFACE: 2 x test ports, Manual test button, Auto test button, Power/tone switch, LED indicators.
• RECEIVER INTERFACE: Test port, LED indicators
• CONTINUOUS SCAN: Continuous scan mode is design to accommodate testing with cable ends in different locations
• MANUAL SCAN: Manual scan is well suited for loop back cable testing
• COMPATIBLE CABLES: Cat 7, 6, 6e, 6a, 5, 5e, 4, 3, 3e, Coax cable, USB and 1394 cable (with TC-NTUF). Not designed for live wires. Connecting tester to a live wire may damage the tester.
• ALSO INCLUDED: 2x RJ-45-to-BNC Adapters, Network Patch Cable, Carry Pouch

TRENDnet

• 【AUTOMATIC OPERATION】The network cable tester runs automatically, and the LED display status can easily and quickly determine the short circuit, open circuit, cross line, and other faults of the self-made network cable or telephone cable.
• 【REMOTE TEST】The host and auxiliary machines of the RJ45 cable tester can be separated, and the maximum separation test distance is 100 meters. You can also use the host to test one end of the network cable to determine whether the other end of the network cable is connected to the device or whether one of the cable cores is disconnected.
• 【MULTI-PURPOSE】The ethernet cable tester suitable for the testing of Ethernet Cat 5, Ethernet Cat 5e, Ethernet Cat 6, Ethernet Cat 7, RJ11 4P, RJ12 6P, and RJ45 8P telephone lines and network lines.
• 【SIMPLE AND EASY TO USE】The Cat5 Cat6 tester is easy to use, accurate test, hand-held, and easy to carry. Note: Please install the battery before use.
• 【STURDY AND DURABLE】The LAN phone line tester is made of environmentally friendly PC material with high hardness, drop resistance, and durability.

HZYH

• ▲WIRE TRACING MULTIFUNCTION - Fast to locate the breakpoint without wire's cover damage, Find wire on all types of connected operating Ethernet switch /Router/PC terminal. Perfect for tracking RJ11, RJ45, cables or other metal wire (via adapter)；And also with the Battery（10V-110V） positive and negative measurements function.
• ▲WIRE TRACKER - The Line Finder can trace not only Ethernet LAN wires, but also electrical and speaker wires when connecting to the alligator clip; In this situation, the wires must be in power-off status, otherwise the units will be damaged; It is recommended to stripe down some of the wires when connecting through the clip; Select "SCAN"; Emitter works properly if the "SCAN" indicator is on; Use the receiver to find target wires.
• ▲NETWORK & TELEPHONE LINE TEST - The Line Finder testes physical connection status of network cable, such as open circuit, short connection, miswire and reverse connection; Use the emitter to test the status of working of telephone lines (such as judging TIP or RING line), test the line level, positive and negative polarity detection; Adjust the volume of receiver by pressing the volume rotary knob.
• ▲EARPHONES DESIGN - With a pair of Earphone, you can just connect the earphone to the headset jack of receive to get clear information in a noise environment, Adjust the volume knob to make the volume proper and avoid being interfered. Notice that if the sound is low, you should check whether the battery is powered off or not, and the LED flashlight allows operation in dark situation.
• ▲24-Month Warranty and You Will Get: 1x Emitter with double RJ11 RJ45 interface, 1x Receiver with BNC interface,1x Pair of Earphone ,1x RJ11 Clip Adapter Cable,1x RJ45 Cable,1x Storage Box,1x English User Manual , Battery Not Included.

BOOGIIO

• PROFESSIONAL VDV CABLE MAPPER: Quickly test voice, data and video cabling for common wiring faults including split pairs
• MAPS MULTIPLE CABLE RUNS: Includes RJ45 & Coax "F" ID remotes (5 of each are included)
• EASY TO READ: The LCD display with backlight allows you to test even in dimly lit areas
• DURABLE: The rugged durable molded housing with snap-in remote is impact resistant for long lasting performance and use
• ACCURATE READINGS: Tone generator for cable tracing (separate Amplifier Probe required)
• PORT COVERS: These covers protect RJ45 and RJ11 ports from dust and debris
• TESTING TIP: If you receive a “U” when testing a cable then it indicates an unidentifiable error. This typically is a result of multiple wiring errors on one particular cable. Typically this is resolved by terminating the ends again

Southwire