Tools that never upload your files

Why every other converter uploads

Not because it is better, but because it is easier and older. Processing on a server was the only option when these sites were built: browsers could not open a PDF, re-encode an image or parse a spreadsheet, so the file had to be sent somewhere that could. That architecture then became the business — a server you must pay for is a reason to meter usage, demand a signup and sell a subscription, which is why upload-based tools cap your file size and count your conversions.

Browsers caught up. WebAssembly runs the same libraries at close to native speed, on the machine already sitting in front of you. Doing the work locally costs us nothing per file, which is the real reason there is no size limit, no daily quota and no account here — and, incidentally, why your file has nowhere to leak from.

PDF documents

Contracts, invoices, statements and signed agreements.

Images

Scans of identity documents, screenshots with data in them.

Spreadsheets and data

Payroll, client lists, exports from internal systems.

Text and documents

Drafts, notes and anything under an NDA.

Common questions

How can a PDF be merged without uploading it?

Modern browsers can do the work themselves. The page loads a PDF library as ordinary JavaScript and WebAssembly, then reads and rewrites the file inside the tab using your own computer's processor. The file is opened from disk by you, handled in memory, and written back to your downloads folder. At no point is there a request carrying it anywhere, because no server is involved in the work.

How do I check that for myself rather than believing you?

Two ways, both take seconds. Open your browser's developer tools, switch to the Network tab, and run the tool: your file appears in no request. Or simpler — load the page, disconnect from the internet, and use the tool anyway. It still works. A site that uploads your file cannot do that, because it genuinely needs the server it sends the file to.

Is this safe for documents my employer will not let me upload?

That is exactly the case these were built for. Because the file never leaves the browser, using one of these tools is closer to opening the file in an application on your machine than to using a website. We cannot see the file, cannot store it, and have nothing to hand over if anyone asks. That said, your organisation sets its own policy, and some prohibit the category regardless of how a tool works — check yours.

Do all your tools work this way?

Almost all, and the exceptions are stated on the tools themselves rather than buried here. A few need the network mid-task: OCR downloads a recognition engine, documents in non-Latin scripts fetch a font, live currency rates need today's rates, and the AI features send your text to a model by definition. Those carry a visible notice, and the ones that cannot honestly promise offline operation do not display the offline invitation at all.

What is the catch? Why is this free?

The pages carry a small number of ads and some link to products we earn a commission on. That is the whole model. Because the tools run in your browser, they cost us almost nothing to operate no matter how many people use them — which is precisely why there is no file size cap, no daily limit and no account.

Does anything at all get sent when I use a tool?

The page itself is downloaded, like any website. Beyond that we record that a tool was opened and whether it produced a result, plus a random id used only to count unique visitors. No file names, no file sizes, no contents, and Do Not Track is honoured. That is disclosed in full on the security page.