Fix PC, Laptop & Wi-Fi Problems — Free IT Tools
Troubleshoot Wi-Fi, Windows errors, slow laptops and everyday devices. Test keyboard, mouse, microphone and webcam — or explore advanced network calculators.
Everyday fixes and advanced IT tools
Search by name or filter by category to find the right utility.
Search across all 40 tools, or explore the four collections below.
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COLLECTION 01 · 7 TOOLS
Internet & Wi-Fi
Diagnose wireless connections, routers, DNS issues and internet access.
Internet Speed Test Guide
Review reliable speed test methods and understand download, upload and latency results.
Internet Connection Checker
Check browser connectivity signals and follow real connectivity tests.
Wi-Fi Troubleshooting Wizard
Find fixes for disconnected or slow Wi-Fi through guided questions.
DNS Troubleshooting Guide
Troubleshoot DNS resolution and sites that will not load.
Router Troubleshooting Assistant
Follow safe steps to diagnose router and modem issues.
Public IP Address Guide
Find your public IP using a reputable external lookup service.
Website Availability Guide
Check whether a website is down with independent external tests.
COLLECTION 02 · 7 TOOLS
PC & Laptop
Find step-by-step help for Windows errors, batteries, overheating and storage.
Slow PC Troubleshooting Wizard
Find common reasons for slow Windows computers.
Laptop Battery Health Guide
Generate a Windows battery report and interpret its values.
Windows Error Code Lookup
Find plain-language explanations and safe first steps for common errors.
Windows Update Troubleshooter
Troubleshoot Windows Update failures step by step.
Storage Cleanup Assistant
Find safe ways to free up drive space without losing files.
Laptop Overheating Assistant
Identify common causes of laptop overheating and shutdowns.
USB Device Troubleshooter
Fix common USB recognition and connection issues.
COLLECTION 03 · 6 TOOLS
Device Testing
Check your keyboard, mouse, screen, camera and microphone in your browser.
Screen Dead Pixel Tester
Use solid screen colors to check for stuck or dead pixels.
Keyboard Key Tester
Test keyboard key presses locally inside your browser.
Mouse Click Tester
Test primary, middle and secondary mouse buttons.
Microphone Tester
Check microphone permission and live audio input level.
Webcam Tester
Preview your webcam locally after granting permission.
Browser Troubleshooting Wizard
Fix common browser loading, cache and extension problems.
COLLECTION 04 · 20 TOOLS
Advanced Networking
Subnetting, IP utilities, data conversion and professional IT calculators.
IPv4 Subnet Calculator
Find subnet masks, networks, broadcast and usable hosts.
VLSM Subnet Planner
Allocate correctly aligned variable-length subnets.
IPv4 Converter
Convert IPv4 to decimal, binary and hexadecimal.
Bandwidth Calculator
Estimate ideal transfer time using link speed.
Password Generator
Secure passwords generated inside your browser.
CIDR / Subnet Mask Converter
Convert between CIDR, subnet and wildcard masks.
IPv4 Address Range Calculator
Find smallest inclusive CIDR blocks for an IP range.
IPv6 Formatter
Validate, expand and compress IPv6 addresses.
MAC Address Formatter
Normalize and validate 48-bit MAC addresses.
Binary / Hex / Decimal Converter
Convert integers exactly across numeral bases.
Storage Unit Converter
Convert MB, MiB, GB, GiB, TB and TiB.
RAID Capacity Calculator
Estimate usable capacity and drive-failure tolerance.
Screen PPI Calculator
Find pixel density using resolution and diagonal.
Display Aspect Ratio Calculator
Reduce resolution to aspect ratio and compute dimensions.
PC Electricity Cost Calculator
Estimate energy and electricity cost for your setup.
TCP Bandwidth-Delay Calculator
Estimate bandwidth-delay product from bitrate and RTT.
DHCP Address Pool Calculator
Count addresses in an inclusive IPv4 DHCP pool.
Wi-Fi Channel Frequency Calculator
Map 2.4 GHz and common 5 GHz channel center frequencies.
SHA-256 File Checksum
Generate a SHA-256 digest locally without uploading files.
IPv4 Address Classifier
Identify private, public, reserved and special IPv4 ranges.
Built for everyday troubleshooting and network professionals
Our guides help you troubleshoot common Windows and Wi-Fi problems. Keyboard, mouse, microphone and webcam tests run in your browser with relevant permissions; they cannot inspect hidden Windows hardware health. Advanced calculators remain available for technical tasks.
We handle IPv4 boundary cases such as /31 and /32, differentiate GB and GiB, and use secure random generation for passwords.