PDF Editor
Edit any PDF online for free — add text, images and drawings to any page, then download instantly.
Drop a PDF to edit
Your file stays on your device — nothing is uploaded
Up to 25 MB per file
Why NinjaPDF is the best free PDF editor online
Most online PDF editors upload your document to their servers, watermark the output or cap how many edits you get per day. NinjaPDF's PDF editor runs entirely in your browser — your file never leaves your device.
| Feature | NinjaPDF | Sejda | iLovePDF | pdfFiller | Lumin |
|---|---|---|---|---|---|
| 100% in-browser (no upload) | Yes | No | No | No | No |
| Free daily edits | Unlimited | 3 tasks / hour | Limited free | Trial only | Limited free |
| Account required | No | For larger files | For larger files | Required | Required |
| Watermark on output | Never | No | No | Trial watermark | No |
| Works offline after load | Yes | No | No | No | No |
| File size limit | Your device memory | 200 pages / 50 MB | Capped on free | Capped on free | Capped on free |
About PDF Editor
NinjaPDF's online PDF editor lets you edit any PDF directly in your browser — add text, insert images, draw with a pen and reposition everything pixel-perfectly on any page. There's no sign-up, no watermark and no daily limit, and because the entire PDF editor runs locally, your document never leaves your device. It's the privacy-first way to edit PDF files online, free, with the polish you'd expect from a desktop editor.
How to use PDF Editor
- 1
Upload the PDF you want to edit — drag it into the upload area or click 'Choose file'. Your file stays on your device.
- 2
Pick a tool from the toolbar: add a text box, drop in an image, or switch to the pen to draw and annotate.
- 3
Click anywhere on the page to place the element, then drag to move it and use the corner handle to resize.
- 4
Jump between pages with the navigation arrows and add as many elements as you need across the document.
- 5
Click 'Apply & download' to export the edited PDF — no watermark, no sign-up.
Why use NinjaPDF
- Free online PDF editor with no watermark or sign-up
- Add text, images and freehand drawings to any page
- Drag, resize and reposition every element
- Edit multi-page PDFs with full page navigation
- 100% in-browser — your PDF never leaves your device
- Works on Windows, macOS, Linux, iOS and Android
Frequently asked questions
How do I edit a PDF online for free?+
Open NinjaPDF's PDF editor, upload your document, then use the toolbar to add text, images or drawings to any page. Drag elements into place, resize them, and click Apply & download to save your edited PDF — no sign-up, no watermark.
Is this PDF editor really free?+
Yes. The online PDF editor is 100% free with no daily limit, no account required and no watermark on the output. You can edit as many PDFs as you want.
Is my PDF uploaded to a server?+
No. Unlike Sejda, iLovePDF, pdfFiller and Lumin, NinjaPDF's PDF editor runs entirely in your browser using WebAssembly. Your file is never uploaded, stored or processed on our servers.
Can I edit existing text in a PDF?+
NinjaPDF lets you cover existing text and overlay new text on top — the standard approach for editing PDFs that weren't created as editable forms. For fully reflowable text editing, the original source document is recommended.
Can I add images and logos to a PDF?+
Yes. Insert any JPG or PNG, then drag and resize it on the page. Use it to add company logos, photos, stamps or scanned signatures to your PDF.
Does the PDF editor work on mobile?+
Yes. The editor is touch-friendly, so you can edit PDFs on iOS and Android tablets and phones with finger gestures for moving and resizing elements.
Are there limits on PDF size or number of pages?+
There's no hard limit — the editor uses your device's memory, so modern laptops and phones can handle PDFs with hundreds of pages.
Will the rest of the PDF stay intact?+
Yes. NinjaPDF only adds the new elements you place onto each page. All original text, images and formatting on other pages are preserved exactly as they were.