About the Online PDF Editor – Add Text & Sign
Edit PDF documents in your browser by adding text notes and handwritten signatures on top of existing pages. Choose a page, click where you want a note or signature, then download the updated PDF file. No registration or upload to ToolMosaic servers is required.
Formula or method
PDF.js renders the original document pages for on-screen previews. Text and hand-drawn signature marks are stored locally as positioned overlays; pdf-lib writes them onto corresponding PDF pages when exporting. The original document content is not reflowed or rewritten.
Worked example
Open a two-page application form. Choose Add text, type 'Approved' and click next to the signature field. Switch to Draw & sign, write your name with your mouse or finger, place it on page two, then download the edited PDF.
How to use the tool
- Open a PDF and choose the specific page to annotate in the preview.
- Add text or draw a signature, then position it carefully on the preview.
- Download the edited PDF and reopen it to verify the final placement.
Common uses
Completing forms, adding approval notes, inserting a drawn signature and commenting on PDF pages.
When this tool is useful
Annotate existing PDFs with text notes or a handwritten signature in the browser.
What to check before relying on the result
Annotations are added over the original page. Existing embedded text is not modified, redacted or removed.
Assumptions and limitations
This is an overlay/annotation editor, not a Word-style PDF paragraph editor. Existing text, images and fonts cannot be selected and rewritten. Text output supports basic Latin characters; encrypted PDFs, advanced forms and certification signatures may not be supported. A handwritten image is not a cryptographic digital signature.
Frequently asked questions
Can I edit existing text in a PDF using this tool?
You can place new text over existing PDF content and add a visible signature, but you cannot directly replace text objects, reflow paragraphs or change the source PDF fonts with this editor.
Can this editor delete confidential text from a PDF?
No. Covering text with a shape or note is not secure redaction. Use a dedicated redaction workflow for sensitive information.
Continue with a related workflow
Privacy and support
Your inputs are processed locally in your browser. ToolMosaic does not upload or store the values you enter in this tool. Our tools are free, and we appreciate your support.