Direct answer
Add a typed signature in a mobile browser.
Reviewed by PlainPDF on . How we review our tools.
When this page helps
- Adding a simple typed acknowledgement.
- Documents that accept a visible typed signature.
Will this approach work?
Best suited to
- Adding a simple typed acknowledgement.
- Documents that accept a visible typed signature.
Not designed for
- Certificate-backed digital signatures.
- Placing signatures interactively on any page.
How the related tool works
The browser embeds an italic standard font and writes the entered text onto the first page before downloading a new PDF. The original PDF remains unchanged.
How to complete this task
- Open the Sign PDF tool.
- Choose a supported file and review the task settings.
- Process the file and check the downloaded result.
Privacy and trust notes
- Files are processed in your browser and are not uploaded to our servers. Closing or resetting the tool clears the selected files from this page.
- Core tools do not require an account or email address.
- Review the downloaded result before sharing it.
Practical notes
- Keep an original copy before changing a document.
- Check the output before sending or uploading it.
- For strict file limits, allow extra space because portals may count file size differently.
Common errors and limitations
- This adds typed text, not a cryptographic digital signature.
- The signature is placed on the first page.
- Large files can exceed available browser memory.
Frequently asked questions
Can I sign pdf on mobile online?
PlainPDF adds typed signature text near the bottom-right of the first page. This is a visible typed acknowledgement, not a certificate-backed cryptographic digital signature.
Do I need to provide an email?
No. Core tools do not require email.