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Guías de PDF y cómo hacerlo

Edit any PDF onlinewithout uploading it

Change text in its own font, sign a page and type on a form, right in your browser - no detour through Word, and your file never leaves your computer.

A PDF document with a dashed measuring frame around a small solid block, standing for a file squeezed to fit a size limit
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PDF under 100 KB

How to Compress a PDF to 100 KB (or Any Size a Form Demands)

A visa portal wants 100 KB and your scan is 1.8 MB. Here is how to find out what is making the file heavy, which level to pick, and what to do when Smaller still is not small enough.

10 min readLeer la guía
A PDF document with a red warning triangle over it, marking a file that will not send as an email attachment
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Too big to email

Your PDF Is Too Big to Email: The Limits and What Actually Works

The send button failed, or the message bounced an hour later. Here are the real attachment limits at Gmail, Outlook and a typical company server, why your file gets a third bigger in transit, and the four ways to get the document there.

11 min readLeer la guía
A contract page with a pen angled across it and one line on the page marked in red
Editar PDF

Sign a PDF online

How to Sign a PDF Online, Free, Without Printing It

A contract needs signing today and there is no printer. Draw your name once, put it on the line, type the date, and save. It takes about two minutes in the browser, and the file never leaves your computer.

10 min readLeer la guía
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Filling a PDF form

How to Fill In a PDF Form, Even One That Is Not Fillable

You click where your name goes and nothing happens. A great many of the forms people are sent have no fields in them at all - they are pictures of forms. Here is how to tell the two kinds apart in two seconds, and fill either one so it does not look pasted on.

10 min readLeer la guía
A row of PDF page thumbnails with one page tinted red and lifted out of the row, marked for deletion
Unir, dividir y organizar

Delete pages from PDF

How to Delete Pages from a PDF (and Get the Page Count Right)

The blank backs of a duplex scan, an internal cover sheet, a section that should not leave the building. All three are the same job. Here is how to say which pages go, in one pass, and how to check you got it right.

10 min readLeer la guía
Three separate PDF documents being combined into one, with the middle document marked as the inserted page
Unir, dividir y organizar

How to insert PDF pages

How to Insert Pages into a PDF, or Add One PDF to Another

A signed page has to go back in at page seven, an appendix has to go on the end, a cover sheet has to go in front. All three are one job: a split and a merge. Here is the method and the arithmetic that proves it worked.

10 min readLeer la guía
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Make a PDF editable

How to Make a PDF Editable: Two Routes and When to Use Each

You clicked where the wrong date is, typed, and nothing happened. A PDF is not a document you type into, it is a drawing. Here are the two honest ways to change one, and how to tell which your job needs.

10 min readLeer la guía
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PDF into Google Docs

How to Open and Edit a PDF in Google Docs

Google Drive will open a PDF in Google Docs in one click, and it will flatten your layout while it does it. Here is what that step actually changes, and the free two-step route that keeps far more of the document.

10 min readLeer la guía
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Protección y seguridad

Black boxes hide nothing

Blacking Out Text in a PDF Is Not Redaction

A black rectangle drawn over an account number hides it from your eyes and from nobody else. The text is still in the file, still copyable, still searchable. Here is what is really happening, and what actually removes the words.

11 min readLeer la guía
A magnifying glass held over a PDF document, with one line of the page picked out in red
Protección y seguridad

Is this PDF safe?

Is This PDF Safe to Open? How to Check Before You Click

An invoice from a supplier you half recognise, or a delivery notice for a parcel you are not sure you ordered. Here is what a PDF can and cannot do to your machine, and the short check to run before you open one.

9 min readLeer la guía
Two stacked sheets of paper under a large magnifying glass, standing for a scanner looking at a page as a picture
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Why scans are large

Why Scanned PDFs Are So Large, and How to Shrink Them

Ten typed pages are 200 KB. Ten scanned pages are 40 MB, and they say the same thing. The difference is that a scan is a photograph of a page rather than the words on it. Here is the arithmetic, and what to do about it.

11 min readLeer la guía
A row of scanned page thumbnails with one blank page marked in red, ready to be taken out of the document
Unir, dividir y organizar

Remove blank pages

How to Remove Blank Pages from a Scanned PDF

A double-sided scan of one-sided paper gives you a blank page after every real one, and a file twice the size it should be. Here is how to find them in a minute and take them all out in one pass.

10 min readLeer la guía
Three tilted document sheets feeding through an arrow into one taller PDF sheet
Convertir PDF

Several files, one PDF

How to Convert Several Files to PDF at Once

Forty invoices have to become forty PDFs, or twelve Word documents have to become one pack. Both jobs start the same way and finish differently. Here is the order to do them in, and how naming decides the sequence.

10 min readLeer la guía
A PDF page on a dark field with a warning triangle over it, standing for a document that prints badly
Conceptos básicos del PDF

Why PDFs print wrong

Why Your PDF Prints Wrong: Margins, Scaling and Extra Blank Pages

The file looks right on screen and comes out wrong on paper: an edge cut off, everything a few per cent small, a blank sheet at the end. Four things cause it, and all four are decided before the job reaches the printer.

10 min readLeer la guía
A blue DOC file with an arrow pointing to a red PDF file, showing a document converted before it is sent
Conceptos básicos del PDF

PDF or Word?

PDF or Word: Which File Should You Actually Send?

You are about to attach a file and you do not know which format the other person expects. The answer follows from one difference: a Word file is instructions for building a page, and a PDF is the page. Here is what to send for a CV, a contract, an invoice and the rest.

10 min readLeer la guía

Una guía para cada herramienta

Qué hace cada herramienta, cuándo usarla y los ajustes que conviene conocer antes de subir nada.