About

Free tools for small data jobs, built so that what you paste stays on your own machine.

What this is

This is a catalog of single-purpose tools: hashes and checksums, encoders and decoders, text converters, validators, file inspection. Nothing here needs an account. You open a tool, give it your input, and take the result.

Where your input goes

The short answer is nowhere.

Each tool is a Rust program compiled to WebAssembly. Your browser downloads that module and runs it locally, so the text you paste or the file you choose never leaves your computer. The module is built without host access, which means it has no way to open a network connection or reach anything except the input you hand it. All 29 tools published so far work this way.

You do not have to take our word for it. Open your browser's network panel and run a tool. Your input is not in any request.

Working locally also lifts the size limit. A tool running in your browser accepts up to 60 MiB of input, against 20 MiB for anything that has to reach the server.

A tool that works this way says Runs in your browser above its input, so you know before you paste anything.

What we keep

No account is needed to run a tool, so most visits leave nothing behind at all.

When a tool does run on the server, your input is held only while it is being processed and removed once the run finishes. The result stays for at most 24 hours so you can download it, behind a hashed key that other people cannot reach. We do not read it and we do not reuse it. While it exists, it sits in the EU.

We also collect a little analytics:

Which pages get opened.
Roughly what device and software opened them.

That data is aggregated and cannot be traced back to you, your email, or your IP address. Cookies handle sign-in and remember editor preferences.

Read the full privacy policy