About PocketToolz

PocketToolz is a collection of 163 free tools across 14 categories — PDF and image work, text and code utilities, converters, calculators, and a good deal that is simply useful. There is no account, no upload queue and no paywall.

How it works

161 of the 163 tools run entirely inside your browser. Your file is read from disk by the page itself using the File API, processed on your own device with Canvas, WebAssembly or Web Workers, and written back out — it is never transmitted. That is not a policy we promise to keep; it is how the code is built, and you can watch the network tab to confirm it.

The remaining 2 need something a browser cannot do alone — a currency rate, a video host's public thumbnail. Those pages say so plainly at the top, and the request carries what you typed and nothing about you.

Why it is free

Because it costs very little to run. The tools do their work on your machine rather than ours, so there are no processing servers to pay for — the site is static files and a handful of small endpoints. Advertising covers the hosting. There is no premium tier, no export limit and no watermark, and there is no plan to add any.

What we do not do

• No accounts, so there is nothing to sign up for and no password to lose.
• No session recording, no heatmaps, no profiling. We count page visits so we know which tools to maintain — see the privacy policy for exactly what that involves.
• No storing of your files, your text or your results.
• No dark patterns — no fake progress bars, no “processing” delays designed to sell you a faster tier, no download that turns out to need an email address.

Accuracy

A calculator that returns the wrong number is worse than no calculator, because the output looks equally authoritative either way. The maths behind the tools is checked against known values in an automated test suite that runs on every change — unit conversions against their exact legal definitions, hash functions against published test vectors, the chemistry against IUPAC atomic weights, and the random generators against statistical tests for uniformity. Where a tool relies on an estimate or a rule of thumb, its page says so.

Who makes it

PocketToolz is built and maintained by Umer Labs. If something is broken, wrong, or missing, the contact page is the fastest route — corrections to the calculations are especially welcome.