What this is
SiriTools is a set of 32 free tools for working with PDFs, Word documents and images — merging, splitting, converting, compressing, resizing. The difference from most tools like it is where the work happens: on your own computer, inside your browser tab, rather than on somebody else's server.
Why that matters
The usual way a file converter works is that you upload your document, a server processes it, and you download the result. That means your contract, your CV, your medical scan or your ID photo sits on a machine you do not control, for an amount of time you cannot verify. For a lot of everyday documents, that is a bad trade for the sake of a small convenience.
SiriTools does the same job using JavaScript running in your browser. Because there is no upload, there is no copy of your file to leak, sell, retain or hand over. It also means there is no file-size cap and no daily limit, because we are not paying for the processing — your own machine is doing it.
How to check the claim
Do not take our word for it. Open any tool, press F12 to open your browser's developer tools, and switch to the Network tab. Run a conversion. You will see no request carrying your file. Every tool page also shows a live counter of file bytes uploaded, which stays at zero.
Limitations, honestly
Local processing has real trade-offs, and it is better that you know them:
- Very large files are limited by your device's memory, not by us.
- PDF-to-Word extracts text, but complex layouts will not survive perfectly.
- Scanned PDFs contain images, not text, so there is no text to extract without OCR.
- Password-protected PDFs must be unlocked before the tools can read them.
- Older browsers may not support everything; a current Chrome, Edge, Firefox or Safari is best.
Who runs it
SiriTools started with a small, irritating problem. I needed to merge a few PDFs on a work laptop, searched for a tool, and found a dozen sites that all wanted me to upload the documents first. The files were nothing dramatic — but they were mine, and handing them to a company I had never heard of, to do something my own computer could manage in a second, felt like a bad trade. I closed the tab and did it the long way instead.
It turned out the upload was never necessary. Browsers have been able to read, edit and write PDFs, Word files and images locally for years; most tools send your file to a server because servers are easier to build, easier to meter, and easier to monetise — not because the work requires one. So I built the version I had wanted: the same tools, running entirely inside the browser tab, with nothing leaving the machine. There are 32 of them now.
That single decision explains almost everything else about the site. There is no account, because there is nothing to attach one to. There is no file size limit, because your computer is doing the work rather than mine. There is no paid tier, because there are no processing costs to recover — the site is supported by advertising instead. And the privacy claim is not a policy promise you have to trust; it is a property of how the thing is built, which you can verify in about ten seconds with your browser's developer tools.
SiriTools is a one-person operation, not a company with a team behind it. There are no investors and no growth target, which mostly works in your favour: nobody here has a reason to want your data, and no product manager is going to decide next quarter that the tools should require a login.
If something breaks, or a tool mangles a file it should have handled, I would genuinely like to know — write to hello@siritools.com. Please describe the problem rather than sending the file; keeping your documents away from me is the whole point.
Cost
SiriTools is free to use with no account. The site is supported by advertising; see the Privacy Policy for what that involves.