The workshop, corner by corner

Drop your PDFs in together. The tool stacks them end to end in the order you can see on screen, and hands you back a single file. None of the documents ever leaves your device.

Type “1-3, 7, 12-” the way you normally type it. The tool shows you the exact list of pages it is about to take BEFORE it acts, and names the ones you asked for that do not exist.

The tool shows the angle of EVERY page before acting, then reads back the angles of the file it produced. Rotating a page touches no pixel: a display angle changes, so it is lossless.

The weight of a PDF is nearly always its images. The tool lists them one by one, says what it can do with each, and shows the real gain before and after. When there is nothing to gain, it says so instead of handing you the same file under another name.

This tool fills PDFs that HAVE real form fields, and it tells you straight away if yours has none. It lists every field by its name, fills it, then reopens the produced file to check your answers really are in there.

Positions are systematic, never picked with the mouse: that is what makes it possible without displaying the page, and so without carrying a rendering engine. The tool shows you BEFORE the act what will be written on each page, and it names the pages whose display angle is going to tip everything sideways.

Drop your photos in together: they become a PDF, one page per image. A JPEG and a PNG go in UNTOUCHED; any other format is re-encoded, and the file's line tells you so.

A PDF does not keep its metadata in one place, it has three. The tool shows you all three, empties them, then REOPENS the file it just made to tell you what is left.

The direction is deduced from the file: a document in the clear gets locked, a protected document gets opened. The method is shown before the act, revision included, and the file you get is REOPENED to check that it really opens.

Drop a file in and give a password: you walk away with a strongbox nobody can open without it. Drop a strongbox in, give the password, and you get the original file back, with its name.

Six random words beat an eight-character password, and the tool PROVES it by the arithmetic. It also says what is useless: the capital and the separator are worth zero bits.

Drop any file in and its fingerprint appears. Paste the one the download site publishes, and the tool tells you whether the two match, character by character.

Paste a link: the tool shows every tracker, says who it belongs to, and hands you the clean address. It never goes to see where the link leads, and it does not break the parameters that actually do something.

Almost every free QR code generator builds a redirect link that goes through THEIR server: they count every scan, and the code dies if the service shuts down. This one writes your data INTO the code, here, sending nothing, and shows you the codewords it computed.

A timer that counts what is left from a fixed end instant, never by adding up ticks: that is the only way not to drift when the browser slows its timers down, which it does to save power and documents openly.

Nearly every online draw uses the browser's ordinary random function, which is predictable. This one uses the system's cryptographic generator, with rejection, and it shows you the exact count of possible outcomes.

A PDF, not a page to print: what comes out of a browser's print dialogue depends on its settings, its margins and its mood, whereas a PDF gives the same sheet on every printer.

Your revision schedule lives in YOUR file, not in our database: you drop it in, you revise, you export it again. No account, no subscription, and nothing to rescue if the service shuts down, because there is no service.