Free online tools for Linux admins, developers, IT teams, and web professionals.
Fast browser-based utilities for DNS lookups, SSL checks, server config generation, network troubleshooting, data formatting, and everyday infrastructure tasks.
Use this site to solve common technical tasks faster without digging through scattered commands, notes, or one-off snippets.
From DNS and HTTPS checks to Linux permissions, cron schedules, Subnet calculations, JSON formatting, and config generation, these tools are built to be practical, lightweight, and easy to use.
Quick Start
Popular tools:
- DNS Lookup Tool
- SSL Certificate Checker
- HTTP Header Checker
- Nginx Config Generator
- CIDR / Subnet Calculator
- JSON Formatter
- Password Generator
Browse by Category
Linux & Server Tools
Tools for setup, configuration, permissions, scheduling, and server administration.
- Ansible Playbook Writer
Generate starter playbooks for common Linux server stacks. - Nginx Config Generator
Build common Nginx server block configs for websites and reverse proxies. - Chmod Calculator
Convert Linux file permissions into numeric and symbolic modes. - Cron Generator
Create standard 5-field cron schedules for Linux tasks. - .htaccess Redirect Generator
Generate common Apache redirect rules for HTTPS, domain moves, and URL changes.
Networking & DNS Tools
Tools for DNS checks, subnet planning, IP review, and connectivity troubleshooting.
- DNS Lookup Tool
Query live DNS records for domains and subdomains. - Reverse DNS Lookup
Check PTR records and hostname mapping for IP addresses. - WHOIS Lookup
Review registrar, nameserver, and domain registration details. - IP Lookup Tool
Inspect IP address type, format, and network context. - CIDR Subnet Calculator
Calculate network ranges, masks, and usable host counts. - Port Lookup Tool
Identify what common TCP and UDP ports are used for. - TCP Port Tester
Test whether a TCP port is reachable on a host.
Website & HTTPS Diagnostics
Tools for checking site responses, certificates, redirects, and speed.
- SSL Certificate Checker
Review certificate validity, expiration, and hostname coverage. - HTTP Header Checker
Inspect response headers, redirects, caching, and security headers. - Website Speed Test
Check response time, status, final URL, and page size.
Developer & Data Utilities
Tools for formatting, decoding, transforming, and generating technical values.
- JSON Formatter
Format and validate JSON for easier debugging. - Base64 Encoder / Decoder
Encode plain text to Base64 or decode it back. - JWT Decoder
Inspect JWT headers and payload claims. - Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes. - UUID Generator
Generate version 4 UUIDs for apps, APIs, and databases. - Random String Generator
Create custom random strings for tokens, IDs, and test data. - Case Converter
Convert text to uppercase, lowercase, title case, or sentence case.
Security & Utility Generators
Quick tools for passwords, identifiers, and common admin values.
- Password Generator
Create stronger random passwords for websites, servers, and apps. - Random String Generator
Build flexible random strings for many technical workflows. - UUID Generator
Generate standardized unique identifiers quickly.
Who This Site Is For
- Linux system administrators
- developers
- DevOps and infrastructure teams
- freelancers and consultants
- hosting users
- self-hosters
- small business site owners managing their own websites or servers
Some tools are beginner-friendly. Others are meant for users who already know the workflow and just want a faster way to get the job done.
Why Use These Tools
These tools are built to help with the technical tasks that come up all the time, such as:
- checking whether DNS changes are live
- validating an SSL certificate
- testing whether a service is reachable
- generating a clean server config
- formatting JSON or decoding a token
- building a cron schedule
- calculating Linux file permissions
- planning a subnet or checking a port
The goal is simple: save time, reduce mistakes, and make common admin and development work easier.
About the Project
Tech Utility Tools is an independent collection of practical browser-based utilities for Linux, networking, web infrastructure, and technical troubleshooting.
The site is designed to keep things simple: fast tools, clear output, and useful pages that support real technical work.