✓ Free • No Login • Client-Side Processing
✓ Works Offline • No Account Required
The IT Toolbox That
Stays Out of Your Way
For sysadmins and devs who need fast, reliable tools without the clutter.
Runs entirely in your browser. No login required. No data stored or collected by us.
Popular Tools
All Tools
Subnet Calculator
Calculate network address, broadcast, usable range, and total hosts from IP + CIDR.
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Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text instantly.
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JSON Formatter
Paste minified or messy JSON and get it pretty-printed with syntax highlighting.
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Password Generator
Generate strong random passwords with configurable length and character sets.
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IP Lookup
Find your public IP address, ISP, city, country, and timezone information.
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Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input.
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URL Encoder / Decoder
Encode or decode URL strings, handling special characters and percent-encoding.
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Timestamp Converter
Convert Unix timestamps to human-readable dates and back, with live current time.
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WHOIS Lookup
Query WHOIS/RDAP data for any domain — registrar, creation date, expiry, and more.
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DNS Lookup
Query DNS records (A, MX, CNAME, TXT, NS) for any domain via Google's DNS API.
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Regex Tester
Test regular expressions in real time — highlights all matches as you type.
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Binary Converter
Convert numbers between binary, decimal, hexadecimal, and octal instantly.
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JWT Decoder
Decode JWT header and payload instantly — inspect claims, expiry, and algorithm in your browser.
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UUID Generator
Generate UUIDs in versions v1, v4, v5, v6, and v7 — bulk generation, uppercase, and no-hyphens options included.
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Cron Expression Parser
Convert cron schedules to plain English and preview the next 5 run times instantly.
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YAML ↔ JSON Converter
Convert YAML to JSON or JSON to YAML instantly. Auto-detects input format — no server needed.
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Port Checker
Check if a port is open, closed, or filtered on any public host — tested from the internet, not your machine.
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Meta Tag Generator New
Generate standard meta tags, Open Graph, and Twitter Card tags instantly. Live Google and social preview included.
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Robots.txt Tester New
Validate your robots.txt syntax, test URL rules, and generate a clean robots.txt file instantly.
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Email Auth Checker
Check SPF, DKIM & DMARC records for any domain instantly.
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Security Headers Analyzer
Check which HTTP security headers a site has configured.
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Browse by Category
Network Tools
Subnet calculator, DNS lookup, IP lookup, WHOIS, and port checker for network engineers and sysadmins.
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Security Tools
Hash generator, password generator, JWT decoder, and Base64 encoder for developers and security professionals.
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Developer Tools
JSON formatter, YAML converter, regex tester, UUID generator, timestamps, and cron parser for developers.
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Why ToolsKit
Built for the work, not the pageview
Most online tools wrap simple tasks in unnecessary complexity — sign-up prompts, paywalls, and clutter. ToolsKit is different — every tool runs entirely in your browser, processes nothing on a server, and delivers results instantly.
Instant Results
Every tool runs client-side. No waiting for a server response — results appear as you type.
Private by Design
Every tool processes your input locally. Sensitive inputs like passwords, tokens, and keys are never sent to our servers.
No Account Required
Open a tool and use it. There is no registration, no email required, and no session to manage.
Works Everywhere
Clean responsive layout that works on a laptop at a desk, a tablet in a server room, or a phone on the go.
What's Here
Tools for the work you actually do
ToolsKit covers the tasks that come up repeatedly in daily IT and development work — the kind of thing you'd normally Google and find buried under clutter. Clean tools, instant results.
Networking
Subnet Calculator, IP Lookup, DNS Lookup, WHOIS Lookup — the tools you reach for when something on the network is wrong.
Security & Encoding
Password Generator, Hash Generator, Base64 Encoder, URL Encoder, JWT Decoder — for cryptography, APIs, and debugging auth flows.
Developer Utilities
JSON Formatter, Regex Tester, Timestamp Converter, Binary Converter, UUID Generator, Cron Parser — the tabs every developer keeps open.
From the Blog
Guides written for real-world use
Developer Tools
UUID v4 Explained: What It Is, How It Works, and When to Use It
What makes a UUID unique, how v4 differs from other versions, and when to reach for one in your architecture.
SEO
Meta Tags Explained — How to Control What Google and Social Media Show About Your Page
The handful of tags that determine your search snippet, social share previews, and whether Google indexes your page at all.
SEO
Robots.txt Explained — How to Control What Search Engines Can Crawl
How the robots exclusion protocol works, common mistakes that accidentally block your own pages, and how to test your rules.