The job, explained — then done on your device.

• Redact PDF · Edit PDF metadata · OCR PDF

  How to redact a PDF properly (a black box is not redaction)

  Why a black rectangle over text leaves it readable, the three places information hides in a PDF, and a redaction workflow that removes it — in your browser.

• Overlay PDF · Watermark PDF · Compare PDF files · Rotate PDF

  How to overlay one PDF on another without hiding the text

  How to overlay two PDFs: a letterhead or background under the text, a stamp over it, lining pages up, and a see-through overlay without an opacity setting.

• PowerPoint to PDF · Create PDF booklet · Compress PDF

  PowerPoint to PDF: why slides move, don't fit, or lose their video

  Why text and shapes shift when a deck becomes a PDF, why slides don't fill the page, and what happens to video, audio and animation, with what to do about each.

• Edit PDF metadata · Redact PDF · Flatten PDF

  How to remove metadata from a PDF before publishing it

  How to remove metadata from a PDF, and whether you should before publishing: what the fields reveal, the second copy in XMP, and how to clear both on your device.

• JPG to PDF · Organize PDF pages · Compress PDF · Extract images from PDF

  Combine photos into one PDF without losing quality

  Why most image-to-PDF tools quietly re-compress your photos, how page size is decided, and how to build a clean multi-page PDF from JPGs on your own device.

• Compress PDF · Flatten PDF · Split PDF by size or bookmark

  Shrink a PDF under a 2 MB, 5 MB or 10 MB upload limit

  Set a PDF size target while preserving document content. Understand safe compression, realistic limits and alternatives when a file is still too large.

• Compare PDF files · Extract PDF pages · Edit PDF metadata

  What actually changed between two PDF drafts

  Pixel comparison marks every reflowed line as a change. Text comparison reports which words were added and removed, the question a reviewer is actually asking.

• Delete PDF pages · Extract PDF pages · Split PDF · Edit PDF metadata

  Removing pages from a PDF without removing the data

  Deleting a page hides it from view but often leaves its contents in the file. What actually gets removed, what survives, and how to check before you send it.

• Create PDF booklet · Add page numbers to PDF · Rotate PDF

  Printing a folded booklet from an ordinary PDF

  Booklet printing needs pages in an order nobody would guess: 8-1, 2-7, 6-3, 4-5. Why that sequence exists and what imposition calculates on your behalf.

• Text to PDF · Add page numbers to PDF · Crop PDF

  Turning plain text, CSV or Markdown into a readable PDF

  Text files carry no layout at all, so converting one means choosing a page size, margins, a typeface and a line length. Those choices decide whether it reads well.

• Rotate PDF · Crop PDF · Extract PDF pages

  Pages that open sideways, and pages with too much margin

  Rotation and cropping both change how a page is displayed without touching what is drawn on it. Why that matters for quality, and where each one goes wrong.

• Edit PDF · Watermark PDF · Delete PDF pages

  How much of a PDF can actually be edited, and why

  PDF is a final-form format with no concept of a paragraph. That is why rewriting existing text is unreliable, and why adding new content on top is not.

• Grayscale PDF · Compress PDF · Edit PDF metadata

  Converting a PDF to greyscale without growing the file

  Removing colour usually shrinks a document and sometimes makes it larger. Why that happens, when greyscale saves real money, and what it quietly destroys.

• Excel to PDF · PDF to Excel · Create PDF booklet

  Getting a spreadsheet into a PDF that reads properly

  Spreadsheets have no pages until something invents them. Why columns land on the wrong sheet, why formulas convert as values, and what to set before exporting.

• PDF to Excel · OCR PDF · PDF to Markdown

  Getting a real spreadsheet out of a PDF table

  Why PDF tables are not tables, which ones convert cleanly and which never will, and how to check the numbers before you trust a converted spreadsheet.

• PDF to JPG · Extract images from PDF · Compress PDF

  Export PDF pages as images at the right resolution

  How DPI decides the size and sharpness of an exported page, when to choose JPG over PNG, and why extracting a PDF's pictures is a different job.

• Repair PDF · Edit PDF metadata · Merge PDF

  A PDF that will not open: what is broken and what can be fixed

  The three things that usually go wrong inside a damaged PDF, how to tell a repairable file from a truly lost one, and what a repair tool can and cannot put back.

• Merge PDF · Split PDF · Sign PDF · Scan to PDF

  How to save, open and share a PDF on iPhone or Android

  Find your finished PDF on a phone. Learn when to use Download, Open, Share or save, and Rename in Filozy, with iPhone and Android troubleshooting.

• Split PDF by size or bookmark · Split PDF · OCR PDF

  Split a scanned book into chapters without uploading it

  Seven ways to cut a long PDF into parts — bookmarks, chapter words, blank separator sheets, ranges, every N pages, equal parts, size targets — and which suits a scan.

• PDF to Word · OCR PDF · Word to PDF

  PDF to Word without losing the layout: faithful vs editable

  Why PDF to Word is hard, what a faithful page reproduction gives you and what it leaves out, and what to check in the Word file afterwards.

• Convert PDF to PDF/A · Edit PDF metadata · Flatten PDF

  PDF/A for archives: what conformance requires and why fonts matter

  What the PDF/A archival standard demands, why many converters produce files that fail validation, how to fix the usual font problem, and how to check a result.

• Protect PDF · Unlock PDF · Redact PDF

  Password-protecting a PDF: what AES-256 does and does not protect

  Open password versus permissions, what AES-256 really guarantees, why 'no printing' is a request not a lock, and how to protect a PDF on your own device.

• OCR PDF · Auto crop PDF · Redact PDF

  OCR a scanned contract on your own computer

  Turn a scanned PDF into a searchable document without sending it to an OCR service: what affects accuracy, the steps, what to check afterwards, and honest limits.

• Merge PDF · Organize PDF pages · Compress PDF

  Merge PDFs on a phone without installing an app

  Combine PDFs on an iPhone, iPad or Android phone using only the browser: choosing the files, the page order you get, where the result saves, and limits.

• Merge PDF · Compress PDF

  How to check whether a PDF tool uploads your file

  A five-minute test with your browser's developer tools that shows what any free PDF site sends to its servers — and what a local tool looks like instead.

• Flatten PDF · Fill PDF forms · Protect PDF

  Flatten a PDF before sending: forms, comments and signatures

  What flattening does to form fields, comments and signature marks, why it prevents accidental edits, what it does not do, and when not to flatten.

• Add PDF header footer Bates numbers · OCR PDF · Protect PDF

  Bates numbering for discovery, done on your own machine

  What Bates numbers are, the rules they follow, how to keep one continuous sequence across a whole production, and how to stamp it in your browser without uploading.

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