Topic guide · Cluster A
Fusionar, dividir y organizar archivos PDF — sin subir nada
Herramientas para fusionar, dividir, reordenar, rotar, recortar, renumerar e inspeccionar páginas PDF en el navegador. El conjunto completo de herramientas privadas de organización de PDF, en un solo lugar.
La mayor parte del trabajo con PDF no consiste en crear un documento desde cero, sino en dar forma a un documento que ya existe. Tiene doce facturas de proveedores que combinar en un solo extracto. Un escaneo salió con las páginas desordenadas. Un informe de 90 páginas necesita la portada movida al principio y las páginas en blanco eliminadas. Una pieza procesal necesita extraer la página de firma como archivo aparte. Nada de eso necesita un editor nuevo, y nada de eso tiene que salir de su dispositivo. El conjunto de herramientas Fusionar y Organizar de esta página cubre las operaciones que aparecen con más frecuencia: combinar varios PDF en uno, dividir un PDF en varios, eliminar o extraer páginas concretas, reordenar, rotar, recortar, renumerar, y los pequeños pasos de inspección y preparación que hacen posible el resto (recuento de páginas, detección de páginas en blanco, sugerencias de nombre de archivo, imposición de folleto, superposición de una plantilla sobre un documento base). Cada herramienta se ejecuta en el navegador, por lo que los archivos de origen no se suben a un servidor de conversión, no se requiere cuenta, y los PDF originales nunca se sobrescriben: cada operación produce un archivo de salida independiente que puede revisar antes de compartirlo. Si parte de un documento con la forma equivocada, baje hasta la sección que se ajuste a su problema. Cada entrada de abajo es una herramienta enfocada, no una función de un editor general, así que puede usar exactamente la operación que necesita y omitir el resto.
Merge PDF
How to merge PDF files
The most common PDF job: combining several files into one ordered document. Pick the files in the order you want them to appear, run the merge in the browser, and download the result as a new PDF. The original files are not modified, which makes it safe to experiment with different orderings before settling on a final version. The merge works at the page-object level, so vector content, embedded fonts and image quality are preserved from each source.
Try Merge PDF →Split PDF
How to split a PDF into separate files
When you need to send one chapter, one signed page, or a few scanned invoices out of a larger document, splitting is faster than extracting. The split tool creates one PDF per page and packages the results in a single ZIP, which is convenient for email, filing or uploading to a system that accepts many small files. Splitting also helps when a single PDF needs to be reviewed by several people and you want each reviewer to receive only the relevant pages.
Try Split PDF →Extract PDF Pages
How to extract selected pages from a PDF
Extraction is the precise version of split. Instead of one file per page, you keep only the pages you name (individual pages or ranges like 1-3, 5, 8-12) and produce a single new PDF. Useful for one chapter, a signed page, a single invoice, or a small appendix that needs to be sent without the rest of the document. The source file is left untouched, so the operation is non-destructive and you can re-run with a different selection at any time.
Try Extract PDF Pages →Remove PDF Pages
How to delete pages from a PDF
When the goal is the opposite of extract — keep everything except a few pages — the remove tool deletes the named pages and produces a clean copy of the rest. Useful for blank scans, duplicate pages, outdated sections, or confidential appendices that should not travel with the document. The output is a new file; the original is not overwritten, which means you can review the cleaned copy before replacing anything.
Try Remove PDF Pages →Reorder PDF Pages
How to reorder PDF pages
When a scan came out in the wrong order, or a report needs the cover page moved to the front, you can re-specify the page sequence and produce a new PDF that follows it. Enter the desired order (for example 3, 1, 2, 4) and the tool rebuilds the document. The original remains available, which lets you compare orderings or restore the previous sequence if a reviewer prefers it.
Try Reorder PDF Pages →Rotate PDF
How to rotate PDF pages
Sideways or upside-down scans are common, especially for multi-page documents that were fed into a duplex scanner inconsistently. The rotate tool lets you turn individual pages or ranges by 90, 180 or 270 degrees. Page quality, text and images are preserved — only the page orientation changes — so this is the right operation for fixing a misfeed without re-scanning.
Try Rotate PDF →Crop PDF Pages
How to crop or trim PDF margins
Many PDFs ship with wide margins, scanner edges, headers or footer artifacts that you do not need. The crop tool lets you trim the top, bottom, left, right or all margins of any page (or a range) by a chosen amount in PDF points (72 points equal one inch). Cropping changes the visible rectangle but does not resample page content, so the original quality and searchability are preserved.
Try Crop PDF Pages →Remove Blank Pages
How to strip blank pages from a PDF
Scanned documents often contain blank pages between chapters, especially when a duplex scanner picks up both sides of a sheet. The blank-page tool inspects each page for text and visible pixels, then removes pages that appear empty. Pages with text are always kept, and pages without a text layer are checked for visible scanned content so real images are not deleted by mistake.
Try Remove Blank Pages →Add Page Numbers
How to add page numbers to a PDF
Consistent pagination makes printed documents easier to navigate and helps reviewers refer to exact locations. The page-numbers tool places a number on every page at a position you choose (top or bottom, center, left or right) and lets you start from any value when the PDF belongs to a larger document set. The numbering is overlaid on the page without modifying the underlying content.
Try Add Page Numbers →Booklet
How to prepare a PDF for booklet printing
Printing a folded, stapled booklet requires pages to be reordered so that the correct sheets end up next to each other after folding. The booklet tool pads the document to a multiple of four pages and arranges them in the right order for two-pages-per-sheet duplex printing. The page size is preserved — the tool only changes the order — so you can print on the same paper you would have used for the original.
Try Booklet →PDF Overlay
How to overlay one PDF on another
When you need to layer one document on top of another — a watermark, a form template, a translated page, a corrected version — the overlay tool composites the overlay PDF onto the base PDF with adjustable opacity. You can limit the overlay to the first N pages of the base and control transparency. Useful for stamping a letterhead on every page, applying a signature page, or replacing corrected pages onto an older PDF without re-creating the whole document.
Try PDF Overlay →View PDF Info
How to inspect a PDF before organizing
Before you start reordering or splitting, it is useful to know what you are working with. The PDF info tool produces a read-only report with the page count, file size, PDF version, encryption status, metadata, annotation count, form field count and a few structural flags. It does not modify the document, so it is a safe first step before cleaning, redacting or sharing a file.
Try View PDF Info →Auto-rename PDF
How to auto-rename a PDF from its content
Imported scans and downloaded reports often end up with generic filenames like scan_001.pdf. The auto-rename tool extracts the first readable line on the first page, sanitises it for filesystem compatibility and trims it to 80 characters, then offers it as a suggested filename. The PDF content is not changed — only the filename of the downloaded file — so it is a fast way to clean up a folder of unnamed documents.
Try Auto-rename PDF →Frequently asked questions
- 01Can I merge PDF files without uploading them to a server?
- Yes. The merge tool on this page runs in your browser using pdf-lib, so the source PDFs are read into a local in-memory document and never sent over the network. You can confirm this by opening the browser's Network panel while merging a non-sensitive test file — there should be no request carrying PDF data.
- 02How many PDF files can I combine at once?
- There is no hard limit set by the tool. The practical limit is your browser's available memory, since the source files are held in memory while the new document is assembled. For typical PDFs (a few megabytes each), combining 50+ files works without trouble. If you are working with very large files, do them in batches.
- 03Will merging PDFs reduce the image quality?
- No. The merge operation copies page objects from each source PDF into a new document without re-encoding the image streams, so resolution and JPEG quality are preserved exactly as they were in the source files. If you re-rasterize a page in another tool first and then merge, the loss happens during the rasterization step, not during the merge.
- 04Can I rearrange pages after merging?
- Yes. Use the reorder tool on the merged result to set a new page order, or use extract and remove to keep only the pages you want. Every operation produces a separate file, so you can iterate without overwriting the merged copy until you are happy with the result.
- 05Do I need to create an account to merge PDFs?
- No account is required. The merge tool, like every other tool on this page, runs locally in your browser. There is no sign-up, no email confirmation, and no watermark added to the output.
- 06What happens to PDF metadata when I merge files?
- The merge tool keeps the metadata of the first file in the order you selected. If you want to strip metadata entirely or replace it with new values, the secure & protect cluster has a dedicated metadata cleanup and metadata editor for that.