Mortar Calculator
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100 calls/day, no card, no spam. Built by one person, in public.
About Mortar Calc
Mortar Calc 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 Mortar Calc
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.
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'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 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.
Frequently asked about Mortar Calc
- Can I use Mortar Calc commercially?
- Yes. The output of Mortar Calc belongs entirely to you, with no licensing restrictions.
- Will Mortar Calc change my original file?
- Never. Mortar Calc only reads your input file and produces a new output file.
- Does Mortar Calc work on mobile?
- Yes, Mortar Calc is fully responsive and tested on iOS Safari and Android Chrome.
- Is Mortar Calc really free?
- Yes — Mortar Calc is free for unlimited personal use, with no account required and no watermark on the output.
- Are my files uploaded to a server when I use Mortar Calc?
- Mortar Calc processes everything in your browser using local APIs. Your files never leave your device.