Every PDF tool you need, private by default.
Merge, split, compress, watermark and sign PDFs right in your browser — your files never get uploaded.
In short
PDF tools are utilities for editing PDF documents — merging, splitting, compressing, rotating, watermarking and signing. CorePDF runs entirely in your browser, so documents never leave your device, and includes a large-page editor for placing watermarks and signatures before exporting.
Processed privately in your browser
Unlike most online PDF sites, CorePDF processes files locally — nothing is uploaded to a server, which keeps sensitive documents private.
- Merge, split, reorder and rotate
- Compress to shrink file size
- Watermark with text or images
- Draw, type or upload a signature
- Images to PDF
- No uploads — fully in-browser
Frequently asked questions
Are the PDF tools free?+
Yes. Core operations are free, with higher daily limits on paid plans.
Are my files uploaded?+
No. CorePDF processes documents in your browser, so files never leave your device.
Can I sign a PDF?+
Yes — draw a signature, type one in a cursive font, or upload an image, then place and resize it on any page.
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