How to Edit Any PDF for Free

PDFs are designed to be hard to edit. That is the point: they preserve formatting. But when you need to change text, fill a form, merge pages, or sign a document, these free tools handle it without paying for Adobe Acrobat.

Edit Text and Images: LibreOffice Draw

Open any PDF in LibreOffice Draw (part of the free LibreOffice suite). It imports the PDF as an editable document. Click on text to modify it, drag images to reposition them, add new text boxes, and change fonts. When done, export back to PDF via File > Export as PDF.

Limitation: complex PDFs with unusual fonts or heavy graphics may not import perfectly. For simple documents like contracts, invoices, and reports, it works well.

Fill Forms and Sign: Browser Built-In

Modern browsers (Chrome, Edge, Firefox) open PDFs with form-filling capability built in. Click any form field and type. For signatures, most browser PDF viewers now include a “Fill and sign” tool in the toolbar. Draw your signature with a mouse or trackpad, place it on the document, and save.

macOS Preview: Open the PDF, click the markup toolbar icon (pen tip in a circle), then use the Signature tool to create and place your signature. Preview also lets you add text boxes anywhere on the page.

Merge PDFs: Smallpdf or PDFsam

Smallpdf.com: Drag multiple PDFs onto the merge tool, arrange the order, and download the combined file. Free for a few tasks per day.

PDFsam Basic (free, offline): Download from pdfsam.org. Merge, split, rotate, and extract pages from PDFs with no file size limits and no internet required. It does not edit content but handles structural changes to PDFs perfectly.

Split a PDF: Extract Specific Pages

PDFsam Basic: Select “Split by pages” or “Extract pages.” Enter the page numbers you want (e.g., 1-3, 7, 10-12). Save the new file.

Chrome method: Open the PDF in Chrome. Press Ctrl+P (print). Change the destination to “Save as PDF.” Under Pages, enter the specific pages you want. Click Save. You get a new PDF with only those pages.

Compress a Large PDF

Smallpdf.com or iLovePDF.com: Upload, choose compression level, download. Typically reduces file size by 50% to 80% by compressing embedded images. The “basic” compression preserves quality for most purposes.

Ghostscript (free, command-line): For offline compression, install Ghostscript and run a command to compress at your chosen quality level. More control than online tools but requires comfort with the command line.

Convert PDF to Word (for Heavy Editing)

When you need to restructure an entire PDF, convert it to Word first. Upload to Google Drive, right-click, Open with Google Docs. Google’s OCR converts the PDF to an editable document. Make your changes, then export back to PDF (File > Download > PDF).

Microsoft Word: File > Open, select the PDF. Word converts it to a .docx file. Formatting may shift on complex layouts, but text and tables usually convert cleanly.

Add Watermarks or Headers

LibreOffice Draw: Open the PDF, insert a text box with your watermark text (e.g., “DRAFT” or “CONFIDENTIAL”), set the text to a large font with low opacity, position it diagonally across the page, and export.

PDFsam Basic: Does not support watermarks. Use LibreOffice or Sejda.com (free online, 3 tasks/day) for this.

Bottom Line

LibreOffice Draw for text editing, your browser for form filling and signing, PDFsam for splitting and merging, and Smallpdf for compression. No need for Adobe Acrobat for any common PDF task.