PDF learning centre

Practical PDF guides

Choose the right PDF workflow, protect document quality and understand what happens to your files before you convert them.

Updated August 12, 2026 · Reviewed by FreePDF Tools

Merge PDF

Merge PDFs safely without losing quality

Plan file order, handle mixed page sizes and understand browser memory limits before combining documents.

Read the merge PDF guide →
Split PDF

Split a PDF or extract selected pages

Learn when to create one page-range PDF and when to split every page into separate files.

Read the split PDF guide →
Unlock PDF

Remove a known PDF password safely

Compare open passwords and permission restrictions, then verify the unencrypted copy.

Read the unlock PDF guide →
Rotate PDF

Fix sideways and upside-down PDF pages

Choose the correct angle and rotate only the pages that need fixing without rasterising their content.

Read the rotate PDF guide →
Images to PDF

Convert JPG or PNG images to one PDF

Compare A4, Letter and image-sized pages while preserving image order and sensible output quality.

Read the images-to-PDF guide →
PDF to images

Choose JPG or PNG for PDF pages

Compare file size, clarity, transparency and resolution for scans, screenshots, diagrams and photos.

Read the PDF-to-image guide →
Watermark PDF

Add a clear, useful PDF watermark

Choose readable wording, opacity and angle—and understand why a watermark is not encryption.

Read the watermark guide →
Organize PDF

Reorder and delete PDF pages safely

Plan a page sequence, remove unwanted pages and verify forms, links and signatures in the result.

Read the organize PDF guide →
Page numbers

Add PDF page numbers correctly

Skip covers, choose a starting value and keep numbers clear of existing headers and print edges.

Read the page-number guide →
PDF privacy

Remove standard PDF metadata

Clear common properties while understanding what identifiers can remain elsewhere in a document.

Read the metadata guide →
Crop PDF

Crop page edges without clipping content

Measure safe margins, handle mixed page sizes and learn why cropping is not redaction.

Read the crop PDF guide →
PDF privacy

Are online PDF converters safe?

Learn what uploads, retention, HTTPS and third-party processing mean before sending a sensitive document to a web service.

Read the PDF safety guide →
No upload

Convert PDFs without uploading files

Understand browser-local processing and which common PDF operations can run directly on your device.

Read the no-upload guide →

Choose a workflow by the result you need

Your goalBest starting pointResult
Combine a cover, report and attachmentsMerge PDFOne PDF containing every source page
Share only one chapter or appendixExtract a page rangeOne smaller PDF with selected pages
Open a protected PDF without future promptsUnlock PDFA new unencrypted copy created with the known password
Fix pages scanned in the wrong directionRotate PDFA corrected PDF without page screenshots
Submit photos or scans as one documentJPG / PNG to PDFOne ordered PDF made from images
Share a PDF page as an imagePDF to JPG / PNGOne image per selected page
Mark a document as draft or confidentialWatermark PDFA PDF with visible text on every page
Reorder pages or remove blanksOrganize PDFA new PDF with only the pages and order you choose
Number a report after the coverAdd page numbersVisible numbers on the selected page range
Clear common author and title fieldsRemove metadataA copy without standard document-info and XMP fields
Hide scanner borders or excess whitespaceCrop PDFA PDF with smaller visible page boxes
Copy text that already exists in a PDFExtract PDF textPreviewed text or a UTF-8 TXT file

Privacy and browser-processing limits

The tools in these guides process selected documents locally in your browser. The PDF or image bytes do not need to be uploaded to our application server for the supported operations. Your device supplies the memory and processing power, which is why a large batch may work more reliably on a laptop than on a low-memory phone.

Keep your original files until you have opened and checked the result. Use the Unlock PDF tool with a known password before another workflow when necessary; browser tools cannot repair every malformed or damaged document.

Start with the task, not the format name. Decide whether you need one combined document, selected pages, corrected orientation, an image or a visible label. The correct tool becomes much easier to choose.