Convection Calc
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About Convection
Convection was built for the moment you just need to handle this task and move on — no signup, no upload to a third-party server. Everything happens client-side, which means your files and data never leave your machine. The interface is intentionally minimal so you can focus on the task instead of learning the tool. It pairs naturally with the other utility utilities here when you need to chain a quick workflow.
When you'd reach for Convection
You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.
Marketers and ops people whose primary tool is metered.
Stay productive without burning credits.
You're cleaning up a folder of files that accumulated over a project and need to standardize them.
Designers, writers, and developers wrapping up deliverables.
Drop each file in, copy the output, move on.
You need to handle a one-off task right before a meeting and don't have time to install anything.
Anyone working remotely on a borrowed or restricted machine.
Open the page, get the result, paste it into your doc — under a minute.
You're on a public or shared machine and don't want to leave traces of what you're working on.
Travelers, contractors, anyone working from a friend's computer.
Nothing is uploaded, nothing persists if you're not signed in.
Frequently asked about Convection
- Will Convection change my original file?
- Never. Convection only reads your input file and produces a new output file.
- Can I use Convection commercially?
- Yes. The output of Convection belongs entirely to you, with no licensing restrictions.
- Are my files uploaded to a server when I use Convection?
- Convection processes everything in your browser using local APIs. Your files never leave your device.
- Does Convection work on mobile?
- Yes, Convection is fully responsive and tested on iOS Safari and Android Chrome.
- Is Convection really free?
- Yes — Convection is free for unlimited personal use, with no account required and no watermark on the output.