Free Tech Tools & Step-by-Step Guides

Network Ustad — tools and guides that get the job done

Two hundred fourteen free online tools that run privately in your browser, plus clear networking and tech guides written to be followed — no sign-up, no uploads, no waiting.

214 free tools No sign-up Runs in your browser Browse all tools →

Main Tools

The most popular and useful tools, picked from every family.

18 tools
IP in CIDR Range Checker Download Time Calculator SPF Record Builder DMARC Record Builder AES Encrypt / Decrypt Tool RSA Key Pair Generator .htaccess Redirect Generator llms.txt Generator API Request Code Generator Dockerfile Generator PC Power Supply Calculator RAID Capacity Calculator GZIP Text Compressor IEEE 754 Float Converter SLA Uptime Calculator Server Log Analyzer AI Prompt Builder Prompt Token Estimator

Networking & IP

Addresses, protocols, and connections

11 tools
IPv6 Expander / Compressor IP Address Validator IP in CIDR Range Checker Port Number Lookup HTTP Headers Viewer Private / Public IP Classifier WiFi Channel Overlap Checker Download Time Calculator IPv4 Decimal Converter My IP Address Tool DNS Lookup Tool

DNS & Domains

Names, records, and domain setup

7 tools
DNS Zone Record Generator SPF Record Builder DMARC Record Builder Domain WHOIS Lookup Domain Typosquat Generator Punycode Converter DNS TXT Record Parser

Security & Privacy

Encryption, keys, and safe headers

10 tools
SHA-1 Hash Generator SHA-512 Hash Generator AES Encrypt / Decrypt Tool RSA Key Pair Generator Email Header Analyzer Cookie Header Parser Content Security Policy Builder Permissions Policy Builder Strong Password Generator SHA-256 Hash Generator

Webmaster & SEO-tech

Site files, tags, and search setup

18 tools
Robots.txt Tester .htaccess Redirect Generator Cache-Control Header Builder llms.txt Generator HTML Accessibility Checker HTML List Generator HTML Form Generator iFrame Embed Code Generator Keyword Density Checker Meta Tag Generator Meta Title & Description Length Checker Slug Generator

View all in Webmaster & SEO-tech (6 more) →

Developer

Code, configs, and dev workflows

36 tools
INI / Properties to JSON Converter Regex Find & Replace Tool Hex Dump Viewer Unicode Escape Converter API Request Code Generator cURL Command Parser .env File Generator Dockerfile Generator Docker Compose Generator .gitignore Generator License File Generator README Generator

View all in Developer (24 more) →

System & Hardware

Machines, circuits, and components

20 tools
JavaScript Benchmark Tool Battery Status Checker GPU Info Checker Display Refresh Rate Tester PC Power Supply Calculator Monitor PPI Calculator RAID Capacity Calculator UPS Runtime Calculator Logic Gate Simulator Boolean Truth Table Generator Karnaugh Map Solver Resistor Color Code Calculator

View all in System & Hardware (8 more) →

Data & Encoding

Formats, codes, and checksums

22 tools
Quoted-Printable Encoder / Decoder UTF-8 Byte Counter Base58 Encoder / Decoder Playfair Cipher Tool Rail Fence Cipher Tool GZIP Text Compressor CRC32 Checksum Generator Hamming Code Calculator Gray Code Converter BCD Converter Endianness Converter IEEE 754 Float Converter

View all in Data & Encoding (10 more) →

Web Performance & Monitoring

Speed, uptime, and reliability

10 tools
SLA Uptime Calculator Uncompressed Image Size Calculator Video Bitrate Calculator Cache Hit Ratio Calculator Server Capacity Estimator Apdex Score Calculator MTBF / MTTR Calculator Server Log Analyzer Resource Hints Generator Image Srcset Generator

AI Tools

Prompts, tokens, and AI workflows

22 tools
AI Prompt Builder AI Prompt Enhancer Prompt Token Estimator AI Token Cost Calculator Context Window Checker System Prompt Generator Few-Shot Example Formatter AI Image Prompt Builder Negative Prompt Generator AI Sampling Parameter Demo AI Glossary Lookup AI Model Comparison Table

View all in AI Tools (10 more) →

More Tools

Everyday tools from the original collection — general calculators, text, image and utility tools

58 tools
Acronym Generator Age Calculator Aspect Ratio Calculator Barcode Generator BMI Calculator Case Converter Character Counter Click Speed (CPS) Test Color Contrast Checker Compound Interest Calculator Countdown Timer CSS Border Radius Generator

View all in More Tools (46 more) →

Explore Categories

All guides →
Streaming & Smart TV 100 guides Mac & macOS 100 guides Gaming Tech & Consoles 100 guides Cloud Storage & Backup 100 guides Email How-Tos 100 guides Social Media Tech Help 100 guides Smart Home 100 guides Linux & Open Source 100 guides Data Recovery & Files 100 guides iPhone & iOS 100 guides AI Tools & Technology 90 guides Web & WordPress 75 guides Programming & Coding How-Tos 61 guides Networking & Wi-Fi 50 guides Windows & PC Tips 50 guides Android & Smartphones 50 guides Mobile Networks & SIM 50 guides Gadgets & Smart Devices 50 guides Software & Apps How-Tos 50 guides Cyber Security & Privacy 50 guides Internet & Broadband 50 guides PC & Mobile Tools 40 guides SEO Tools 40 guides Online Tools 40 guides

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