Skip to content
English
The WorkbenchTools that upload nothing
A workshop by the ODERSA associationNothing leaves, nothing is kept, nothing reaches us.

The workshop · The image corner

The image corner

Mask a face, a plate or a bank number on an image

This tool does not blur, and that is deliberate: blurring and pixelation both come undone. It replaces the pixels with an opaque fill, the only method of which it can be said that nothing is left to recover.

.png · .jpg · .webp · .avif

Your file never leaves your device

This tool works entirely inside your browser. Not one byte of your file is sent anywhere, and nothing is kept once the tab is closed.

Checkable in ten seconds, without taking our word for it:

  1. Open your browser's inspector: the F12 key (or Ctrl+Shift+I, or Cmd+Option+I on a Mac).
  2. Go to the “Network” tab, then clear the list.
  3. Process a file on this page. The list stays empty: no request goes out.
  4. To go further: cut your connection and do it again. The tool still works.

This absence of requests is also checked BY MACHINE before every release: a lock drives a real browser, processes a real file, and refuses to publish if a single byte goes out.

The proof page, step by step and in pictures

Going further

InstructionsHow it works

Any format your browser can display can be masked. The output is PNG or JPEG: those are the two formats every browser can write.

VerifyThe proof, step by step

The network inspector check, explained one gesture at a time, with screenshots.

The cornerThe image corner

The other tools in this corner of the workshop.

UnderstandHow this is built

The formats actually handled, browser by browser, and what we ruled out.