Useful tools.
Zero friction.
A focused collection of free tools for networking, development and everyday tasks. Open a tool and get straight to work — no account, no clutter.
Explore the collection
HostVitals
Compare browser, edge, DNS and official status signals to troubleshoot a website.
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Download Time Calculator
Estimate transfer time or calculate the speed required to meet a deadline.
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Subnet & CIDR Calculator
Calculate IPv4 network details, address ranges, masks and host counts.
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JSON Formatter
Format, minify and validate JSON directly in your browser.
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Unix Timestamp Converter
Convert Unix timestamps to dates and times, and convert dates back.
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Cron Explainer
Understand a cron expression and preview its upcoming run times.
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Network & IP Inspector
View your public IP, ISP and useful network details in one place.
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UUID Inspector
Inspect UUID, ULID, ObjectId and Snowflake identifiers and byte order.
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Network Planner
Compare address blocks and plan IPv4/IPv6 subnets and allocations.
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QR Code Generator
Create QR codes for text, links, Wi-Fi networks, contacts and messages.
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Password Generator
Generate secure random passwords or memorable passphrases locally.
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Base64 Encoder / Decoder
Encode and decode text or files privately in your browser.
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Regex Tester
Test JavaScript regular expressions with match highlighting, capture groups and replacement previews.
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Unit Converter
Convert data sizes, length, mass, temperature and speed with clear SI and IEC units.
Open toolWant to understand the “why” behind a result?
Explore practical, example-led guides for networking, time, data and developer tasks.