numcal. / PDF / ORGANIZE

Shuffle the pages.

Every page as a thumbnail: drag into order, rotate the sideways scans, drop the blanks. Your PDF never leaves the browser.

Drop a PDF here
or click to browse

Field notes

What can I do to a page?

Drag it anywhere in the order (or nudge with ‹ ›), rotate it a quarter-turn at a time (), or delete it (×). The label under each thumbnail keeps the page’s original number, so you always know what came from where. “Start over” undoes everything.

Why do previews appear gradually?

Pages are rendered one by one, in your browser, and the list is usable immediately — you can start dragging before the previews finish. Very large documents show previews for the first 300 pages and numbers beyond that, to be kind to your machine’s memory.

My files really aren’t uploaded?

Really. The PDF engine is JavaScript running in your browser tab — your file is opened from your disk into your machine’s memory, reassembled there, and saved back to your disk. Our server serves the page and the engine script, then stops being involved; you can watch the network tab, or cut your connection after the page loads and everything still works. For contracts, medical records, payslips — the files people actually need PDF tools for — that is the entire point.

What are the limits?

Your device’s memory — there is no page cap, file cap, daily quota or account. A 200-page report is nothing. A 500 MB scanned tome will make a phone sweat; a laptop handles it. If it fits in your browser, it works.