What “the file never leaves your desk” actually means.
Clack is a static website. The merge, split, rotate, trim, optimize and image-to-PDF tools run as JavaScript in your tab. Your PDF is not posted to our servers, because we do not have a server that accepts files.
What stays on your computer
- The original file, and the new file you download.
- The bytes held in memory while the job runs. Closing the tab drops them.
What this does not hide
If this device is shared, logged, or backed up, a downloaded PDF can still be copied. A compromised browser can still read a tab. We are not a vault. We are a workbench that does not make an extra copy on our side.
How to tell
Turn on your browser’s developer tools, open the Network panel, and run a job. You should see no upload of the PDF. The only requests are for this site’s own scripts, fonts and pages. You can also use the site offline once those assets are cached, though we do not yet ship a formal offline package.
Price
Free light use covers the tools on the desk. Pack is US$4.99 / KSh 650 a month, at US$1 = KSh 130, set 12 Nov 2026, for batch ZIP and a heavier compress. Payments are not wired yet — get notified.