✓ Free • No Login • Privacy-Friendly
The IT Toolbox That
Stays Out of Your Way
15 browser-based tools for developers, sysadmins, and network engineers. No sign-up, no data collection, no nonsense — just open and use.
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 cryptographically random v4 UUIDs in bulk — with uppercase and no-hyphens options.
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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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Why ToolsKit
Built for the work, not the pageview
Most online tools are wrapped in ads, paywalls, or sign-up prompts. ToolsKit is different — every tool runs entirely in your browser, processes nothing on a server, and has zero friction between you and the result.
Instant Results
Every tool runs client-side. No waiting for a server response — results appear as you type.
Private by Design
Your data never leaves your browser. Sensitive inputs like passwords, tokens, and keys are never transmitted.
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, find a sketchy site, and wonder if your input is being logged.
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
Networking
Subnetting Without the Headaches: A Practical Guide
CIDR notation, usable host counts, and how to plan an address scheme that won't bite you later.
Encoding
Base64 Is Not Encryption — Here's What It Actually Is
A common misunderstanding that causes real security bugs. What Base64 does, where it appears, and how to use it correctly.
Security
Decoding JWTs: What's Actually Inside That Token
Three dot-separated strings that carry your authentication state. Here's how to read them, what the claims mean, and what not to store in them.