What does editing a PDF online mean?
Editing a PDF online means modifying a PDF document directly in your browser without installing any software. You can edit text, update images, add annotations, fill forms, rearrange pages, add watermarks, and more. All changes are applied instantly, and you can download the edited PDF immediately. No upload to servers – everything happens locally in your browser for complete privacy.
Can I edit text in a PDF?
Yes. You can click on any text in the PDF and edit it directly. Change words, update dates, fix typos, or rewrite entire paragraphs. The editor preserves original fonts, sizes, colors, and formatting. For scanned PDFs, the built-in OCR feature converts images to editable text first.
Can I add comments and annotations to a PDF?
Yes. Our editor allows you to add comments, highlights, underlines, strikethroughs, and sticky notes. You can choose colors for annotations and show or hide them. Perfect for document review, feedback, and collaboration. Annotations are non-destructive and can be removed anytime.
Can I fill out PDF forms online?
Yes. The editor supports all standard PDF form fields including text fields, checkboxes, radio buttons, dropdown menus, and signature fields. Fill out forms, add digital signatures, and save filled forms as new PDFs. No need to print, fill, and scan – complete everything online.
Can I edit images in a PDF?
Yes. You can replace images with new ones, resize them, rotate them, or remove them entirely. Support for JPG, PNG, GIF, and SVG formats. Upload new images from your device and position them precisely. Maintain quality with optional compression settings.
Can I reorganize pages in my PDF?
Yes. The editor includes a visual page organizer with thumbnail previews. You can reorder pages by drag-and-drop, rotate pages (90°, 180°, 270°), delete unwanted pages, extract specific pages into new PDFs, and insert blank pages. Full control over document structure.
Is my PDF document secure during editing?
Absolutely. All editing happens directly in your browser using client-side libraries. Your PDF never leaves your device – no upload to external servers, no cloud processing, no third-party access. Complete privacy for confidential documents, legal contracts, and sensitive information. Files are cleared from memory after you close the page.
What is the maximum file size and number of pages?
The tool accepts PDF files up to 50 MB. For page count, typical documents edit without issues. For extremely large files (hundreds of pages), performance depends on your device memory and browser capabilities. Most business and academic documents fall well within these limits.
Can I edit scanned PDFs or image-based documents?
Yes. Our built-in OCR (Optical Character Recognition) technology converts scanned PDFs and image-based documents to editable text. Supports 50+ languages including Arabic, English, Chinese, French, German, Spanish, Japanese, Korean, and Russian. Edit scanned documents just like native PDFs.
Can I add watermarks and branding to my PDF?
Yes. Add text watermarks (Confidential, Draft, Sample, or custom text) and image watermarks (logos, signatures). Control opacity, position, rotation, and apply to all pages automatically. Perfect for branding, legal protection, and document status marking.
What browsers and devices are supported?
Our PDF editor works on all modern browsers including Chrome, Firefox, Safari, Edge, and Opera on both desktop and mobile devices. For the best experience with complex editing, we recommend using a desktop browser. The tool uses standard web technologies and requires no plugins.
Can I add headers, footers, and page numbers?
Yes. Add custom headers (company name, document title) and footers (date, author, document ID). Insert page numbers with multiple formats (1,2,3 or i,ii,iii or 001,002). Customize fonts, alignment, and positioning. Apply to all pages or specific page ranges.
Can I undo changes while editing?
Yes. The editor supports full undo/redo functionality. You can undo any change – text edits, image modifications, annotations, page reorganizations, and more. Compare before and after with one click. Perfect for experimenting without permanently altering your document.
Is this tool free? Are there any limits?
Yes, our PDF editor is 100% free. There are no hidden fees, subscription requirements, watermarks, or daily limits. You can edit as many PDFs as you need, as often as you like. We believe essential document editing tools should be accessible to everyone – from students to professionals.
What can I do after editing my PDF?
After editing your PDF, you can: (1) Download the edited PDF directly, (2) Add password protection for security, (3) Compress the PDF for easier sharing, (4) Convert to Word for further editing, (5) Merge with other PDFs, (6) Sign the PDF electronically, (7) Extract pages or split the document, (8) Print or share with colleagues. All DonePDF tools work seamlessly together.