Annotate, merge, sign, watermark and convert PDFs — without uploading a thing.
The Mixadù PDF Toolkit lets you annotate, review, merge, organize, sign, watermark, number, fill and convert PDF files without uploading anything. Highlight text, draw, add sticky notes, callouts and stamps, then export an annotated PDF or a review summary. Every operation runs locally in your browser, so sensitive documents never leave your device.
- Annotate & review: highlight, underline, draw, shapes, notes, callouts, stamps
- Merge PDFs and reorder or delete pages
- Add signatures, watermarks and page numbers
- Fill forms, convert images and edit metadata — 100% local, no uploads
Frequently asked questions
Are my PDFs uploaded to a server?
No. All processing happens in your browser; your files never leave your device.
Can I annotate a PDF without Adobe Acrobat?
Yes. The Annotate & Review tool lets you highlight, underline, draw, comment, stamp and sign, then export a standards-compliant annotated PDF — no account needed.
Is the PDF Toolkit free?
Yes, every tool is free with no login.
Can I merge multiple PDFs at once?
Yes. Add several files, reorder the pages, and export a single merged PDF.
Does it work offline?
Yes, once the page has loaded it works without a connection.