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Show HN: WhatCable, a tiny menu bar app for inspecting USB-C cables
A simple, free, open-source utility that demystifies USB-C cable functionality by displaying charging wattage, data speed, display support, and Thunderbolt capabilities in plain English.
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AI Executive Synthesis
A simple, free, open-source utility that demystifies USB-C cable functionality by displaying charging wattage, data speed, display support, and Thunderbolt capabilities in plain English.
WhatCable addresses a pervasive consumer and professional frustration: the opaque and inconsistent capabilities of USB-C cables. The problem statement is clear: identical-looking cables with vastly different performance profiles. This utility provides immediate, actionable information by leveraging existing macOS system data, translating technical specifications into plain language. While a free, open-source tool, it highlights a market need for clarity and transparency in hardware ecosystems. The simplicity of its execution (menu bar app, no tracking) enhances its utility. This type of diagnostic tool, by solving a common "quality of life" problem, demonstrates the value of focused software solutions that enhance hardware usability, potentially reducing support inquiries and user confusion in broader tech environments.
USB-C cables can be a mess. One cable charges at 5W, another does 100W and Thunderbolt 4, and they look identical in the drawer.WhatCable sits in your menu bar and reads the cable data your Mac already has access to. Plug in a cable and it tells you in plain English what it can actually do: charging wattage, data speed, display support, Thunderbolt, etc.Built in Swift/SwiftUI. Open source, free, no tracking.GitHub: https://github.com/darrylmorley/whatcable
Related Ecosystem & Alternatives
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Deep-Dive FAQs
What is WhatCable, a tiny menu bar app for inspecting USB-C cables?
WhatCable, a tiny menu bar app for inspecting USB-C cables is analyzed by our AI as: A simple, free, open-source utility that demystifies USB-C cable functionality by displaying charging wattage, data speed, display support, and Thunderbolt capabilities in plain English.. It focuses on WhatCable addresses a pervasive consumer and professional frustration: the opaque and inconsistent capabilities of USB-C cables. The problem statem...
Where did WhatCable, a tiny menu bar app for inspecting USB-C cables originate?
Data for WhatCable, a tiny menu bar app for inspecting USB-C cables was aggregated directly from the Hacker News community ecosystem, representing raw developer and early-adopter sentiment.
When was WhatCable, a tiny menu bar app for inspecting USB-C cables publicly launched?
The initial public indexing or launch date for WhatCable, a tiny menu bar app for inspecting USB-C cables within our tracked developer communities was recorded on May 1, 2026.
How popular is WhatCable, a tiny menu bar app for inspecting USB-C cables?
WhatCable, a tiny menu bar app for inspecting USB-C cables has achieved measurable traction, logging over 265 traction score and facilitating 98 recorded discussions or engagements.
Which technical categories define WhatCable, a tiny menu bar app for inspecting USB-C cables?
Based on metadata extraction, WhatCable, a tiny menu bar app for inspecting USB-C cables is categorized under topics such as: USB-C cables, menu bar app, Mac, charging wattage.
What are some commercial alternatives to WhatCable, a tiny menu bar app for inspecting USB-C cables?
Our semantic intelligence engine identifies potential commercial alternatives in the SaaS space, such as u2m.io, which offers overlapping value propositions.
How does the creator describe WhatCable, a tiny menu bar app for inspecting USB-C cables?
The original author or development team describes the product as follows: "USB-C cables can be a mess. One cable charges at 5W, another does 100W and Thunderbolt 4, and they look identical in the drawer.WhatCable sits in your menu bar and reads the cable data your Mac alr..."
Community Voice & Feedback
Props to @sleepingNomad here, who has done 16 releases in the last 7 hours, incorporating feedback from HN on the fly!* Don't like menubar apps? you you can run it as a normal app* Don't like GUIs? Now you can run it on the command lineJust look at that Changelog:https://github.com/darrylmorley/whatcable/releases?page=2
I tried to contribute back adapter current Wattage display to stats, but I got my PR closed without comment. It is similar to this:https://github.com/exelban/stats/pull/3024
Thanks for creating this. I'm blind so the $16 USB tester off amazon to sort through my drawer of cables is not an option. This will stop me from needing to buy a sbc just so I have something running Linux to test cables.
I love that this is a native mac app. Thanks for building this, and thanks for sharing.
Cool. Just want to chime in that I wanted to see how quickly GPT-5.5 can turn this into a KDE Plasma 6 Plasmoid. Took about 10 minutes and two dollars, and now I have a nice QML app showing the same information in my taskbar.Just wanted to say this because I feel it's really crazy that I can just do this today...
This is pretty nice, but why do a lot of Mac apps insist on living in the menu bar?
I remember seeing a recent analysis where the vast majority of cables from Amazon misreported their capabilities. Is this tool going to be able to catch those, or blindly report what the chip advertises?
Doesn't work for me. Says "No USB-C ports detected", although I'm pretty sure my monitor is connected via USB-C, and the monitor also has a built-in USB hub where my USB keyboard is connected to.
can something like this be done for linux? maybe a wrapper for lsusb. I just found https://github.com/doug-gilbert/lsucpd which adds PD and more.
Discovery Source
Hacker News Aggregated via automated community intelligence tracking.
Tech Stack Dependencies
No direct open-source NPM package mentions detected in the product documentation.
Media Tractions & Mentions
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Deep Research & Science
No direct peer-reviewed scientific literature matched with this product's architecture.
where I'm trying to land my own scope right now.What was the hardest thing you cut to keep it tiny? I keep
adding "one more useful thing" and have to talk myself down.