Is it free to edit a PDF online?

Yes — PortImg PDF Editor is completely free. There are no hidden charges, no subscription required and no usage limits. All features including text, draw, shapes and image tools are free forever.

Do I need to upload my PDF to edit it?

No. Our PDF editor works entirely inside your browser using WebAssembly technology. Your PDF file is never transmitted to any server. Everything — rendering, editing, and saving — happens locally on your device.

Do I need to create an account or log in?

No account, no login, no registration. Open the page, choose your PDF and start editing immediately. We do not collect any personal information.

Can I sign a PDF document online for free?

Yes. Select the Draw tool and use your mouse, trackpad or touchscreen to hand-draw your signature directly on the PDF page. Your signature is saved as a crisp transparent image embedded in the document.

Can I fill in a PDF form online without printing?

Yes. Use the Text tool to click on any form field and type your information. You can match the font size and colour to blend seamlessly with the form, then download the completed PDF.

What annotation types are supported?

Text annotations (with font, size, colour and style controls), freehand drawing and signatures, 20+ shape types (rectangles, stars, arrows, clouds, speech bubbles and more) and embedded JPEG/PNG images.

Will my edits be visible in all PDF viewers?

Yes. Annotations are baked directly into the PDF using pdf-lib, so they appear as permanent content in every PDF viewer including Adobe Acrobat, Chrome, Safari, Preview, and mobile apps.

Can I edit existing text inside the PDF?

The editor adds new annotations on top of the existing page content. Modifying original embedded PDF text requires a more advanced OCR-based tool. You can, however, cover existing text with a white rectangle and place new text on top.

What is the maximum PDF file size?

You can edit PDFs up to 50 MB in size. For larger documents, consider splitting the PDF into smaller parts first using a PDF splitter tool.

Does it work on iPhone, iPad and Android?

Yes. The editor runs in any modern browser including Safari on iOS and Chrome on Android. Touch drawing and touch-based annotation are supported.

Free PDF Editor Online — Add Text, Sign & Annotate Instantly

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