Edit PDF
Edit PDF documents directly in your browser with complete privacy. Modify existing text, conceal sensitive information with whiteout, draw shapes and freehand lines, add custom text annotations, and insert images—all processed 100% locally on your device.
Your files never leave your device. All processing happens locally in your browser with no file uploads or account required.
How to edit a PDF
- 01
Select PDF file
Upload or drag and drop the PDF you want to edit into the secure browser editor.
- 02
Edit pages and content
Use the top toolbar to edit existing text, add shapes, draw freehand, apply whiteout, or place images on any page.
- 03
Download edited PDF
Click Download PDF to export your edited document instantly with all changes embedded locally.
Important details & limitations
Visually edit existing text, cover sections with whiteout, add shapes, draw freehand, and insert images. 100% private in your browser.
Edit PDF files online for free
PDFira provides a full-featured browser-based PDF editor that runs entirely on your device. Whether you need to update a typo in an existing document, fill out non-interactive sections, highlight crucial passages, or add brand imagery, you can make visual adjustments with pinpoint precision.
Unlike traditional cloud editors that require you to upload your sensitive PDFs to remote servers, PDFira executes all rendering and editing inside your browser using client-side WebAssembly and JavaScript. Your contracts, bank statements, personal records, and confidential files never leave your computer or phone.
Powerful visual editing tools
Edit existing text
Detect text runs in vector PDFs and replace or correct typos directly on the page.
Whiteout & conceal
Cover up sensitive numbers, private details, or obsolete sections with clean whiteout rectangles.
Shapes & annotations
Draw rectangles, circles, lines, and directional arrows with customizable colors and border widths.
Freehand drawing & images
Sketch diagrams or annotations freehand, and insert PNG, JPG, or WebP graphics anywhere.
Editing native vector PDFs vs. scanned documents
PDF documents generally fall into two categories: native vector documents created from Word or design software, and scanned documents that contain full-page images.
• For native vector PDFs: PDFira detects text positions directly, allowing you to select text blocks, cover the original text, and replace it with newly formatted text in standard typefaces.
• For scanned documents and images: Since the page content is a flat image, direct character editing is not possible without OCR reconstruction. However, you can seamlessly use the Whiteout tool to cover outdated details and place fresh text, shapes, or images directly over the blanked area.
Private, browser-based PDF editing
Your privacy is paramount. Traditional online PDF tools upload your documents to third-party conversion servers, which poses severe data privacy and compliance risks. PDFira eliminates this risk entirely: all document parsing, canvas rendering, vector drawing, and PDF saving occur inside your browser's local sandbox. No account registration, no credit card, and no subscriptions required.
Frequently asked questions
How do I edit a PDF online for free?+
Open PDFira's Edit PDF tool, select or drop your PDF document, and use the top toolbar to edit existing text, add shapes, draw, or insert images. When you are finished, click Download PDF to save your edited file.
Can I edit existing text in my PDF?+
Yes. In the Edit Text mode, PDFira detects text blocks across your document pages. Clicking a detected text block allows you to replace or correct the text, adjusting font family, font size, and color to match the page.
How do I whiteout or erase content in a PDF?+
Select the Whiteout tool from the toolbar and draw a rectangle over the content you want to hide. This covers the underlying area with an opaque white box, making it clean and ready for new annotations.
Can I add shapes, arrows, and lines to my PDF?+
Yes. PDFira includes tools for rectangles, circles, straight lines, and directional arrows. You can adjust the stroke color, fill color, line thickness, and opacity for every shape.
Can I insert images into my PDF?+
Yes. Click the Add Image button in the toolbar to upload any PNG, JPG, or WebP image. You can reposition and resize the image anywhere on your document pages.
Are my PDF files uploaded to a server?+
No. PDFira processes 100% of your edits locally in your browser using client-side WebAssembly and JavaScript. Your documents and images never leave your device.
Can I edit scanned PDFs?+
Yes. While scanned pages consist of flat image data rather than editable font glyphs, you can use the Whiteout tool to conceal existing scanned text and place new text boxes, shapes, or stamps on top.
Is PDFira's PDF editor free without limitations?+
Yes. PDFira is completely free to use with no account creation, no subscriptions, no daily file limits, and no watermarks added to your documents.