How to merge multiple PDFs into one?

Use our "Merge PDFs" tool: select your files, drag to reorder, and click Process. Everything is done in your browser — no files are uploaded to any server.

How to compress a PDF without losing quality?

Our compression tool automatically reduces PDF file size while maintaining visual quality. Simply upload your file and download the result.

How to unlock a password-protected PDF?

Upload the protected PDF to our "Unlock PDF" tool. If the file only has copy/print restrictions, removal is automatic. For open passwords, you'll need to enter the password.

Is it safe to use online PDF tools?

Yes! At Unlocked PDF, all files are processed locally in your browser using WebAssembly. No files are ever sent to our servers.

Can I convert images to PDF for free?

Yes, our "Image to PDF" tool converts JPG, PNG, and WebP into multi-page PDF documents, completely free.

Can I use my logo as a watermark?

Yes. Upload your logo and apply it anywhere.

Can I process multiple images?

Yes. Watermark is applied to all selected images.

Is image quality preserved?

Yes. Overlaid without recompressing the original.

图片水印

关于此工具

Add text or logo watermarks to your JPG and PNG images. Protect photos against unauthorized use with customizable stamps.

图片水印

关于此工具

相关工具