How to Add Watermarks to PDF & Images Online Free (Batch Text & Logo Stamping)
Prevent unauthorized distribution and copyright theft by stamping confidential text watermarks or company logos across your PDF documents and photo files. iEditPDF provides full control over font size, color, opacity, diagonal rotation, and tiled repeat patterns—100% free with zero cloud uploads.
Abrir Watermark PDF en el Navegador
Sin marcas de agua, sin subidas y sin registro.
Ventajas clave
- Universal Watermarking: stamp both multi-page PDF documents and graphic images (JPG, PNG, WebP)
- Custom Text & Logo Support: enter custom text ('CONFIDENTIAL', 'SAMPLE', copyright ©) or upload transparent PNG logos
- Tiled Pattern Protection: repeat watermarks across the entire page diagonally to stop cropping theft
- Precision Opacity & Angle Sliders: adjust transparency from subtle 15% watermark to prominent stamps
- 100% Client-Side Privacy: confidential agreements and unreleased product photos never touch a remote server
Instrucciones Paso a Paso
4 PasosSelect Your PDF Document or Image Batch
Open the Watermark tool and drag your PDF document or images into the workspace. The tool renders high-resolution live previews in real time.
Choose Text Watermark or Image Logo Stamp
Select 'Text Stamp' to type words like 'CONFIDENTIAL', 'DRAFT', or your company name. Alternatively, select 'Image Stamp' to upload your high-res transparent PNG brand logo.
Configure Opacity, Rotation, and Tiling Layout
Adjust the transparency slider between 15% (subtle background mark) and 50% (clear ownership stamp). Set the rotation angle to 45° and enable 'Tile Pattern' to cover the whole document diagonally.
Preview Live Stamp & Download Watermarked Files
Review the live canvas preview across every page. Click 'Save Watermarked PDF' or 'Download Images' to export the secured files immediately with zero server delays.
Preguntas frecuentes
Can I watermark both PDF documents and photo files (JPG/PNG)?
Yes! iEditPDF supports stamping watermarks onto multi-page PDF contracts as well as image formats like JPG, PNG, and WebP, making it ideal for both business documents and photography portfolios.
What is the benefit of a tiled watermark over a single center stamp?
A single watermark placed in the center or corner can often be cropped out or obscured. Tiling repeats the stamp diagonally across the entire surface of each page, ensuring that no section can be reused without displaying your copyright.
Can someone easily remove the watermark using an online editor?
To ensure your watermark is irreversible, we recommend chaining the Watermark tool with our Flatten PDF tool. Flattening converts the watermark annotations and text layers into an uneditable static graphic, locking it permanently into the document.
Are my confidential files uploaded to any server during watermarking?
Never. Watermark rendering, canvas composition, and PDF re-encoding take place entirely inside your device's browser memory via WebAssembly. Your proprietary files remain 100% private.