Sign PDF online — PDFWhirl

What Sign PDF does

Sign PDF draws a named visual signature block in a selected bottom corner. It does not create a certificate-backed cryptographic signature.

Sign PDF runs as a queued server job after the source upload completes. The generated artifact receives a separate download link, so the original device file remains unchanged.

How to use this tool

Prepare the source
Confirm that a visible acknowledgement block is suitable; use a qualified digital-signature product when identity validation is required. This preparation matters specifically before using Sign PDF.
Upload and inspect
Select one PDF and a signer name, wait for the Sign PDF upload to finish, and confirm that the displayed source is the intended file.
Choose the available options
Set only the Sign PDF controls needed for this output and review required fields before starting the job.
Download and verify
Inspect the final page placement and confirm recipients understand that the block is visual rather than certificate validation. Keep the source until the Sign PDF result has passed that review.

Common use cases

Prepare a delivery copy

Use Sign PDF to create a separate copy for a recipient without overwriting the maintained source.

Correct one document workflow

Apply Sign PDF to a known document problem after confirming the operation matches the intended outcome.

Create a review candidate

Generate a Sign PDF result that can be checked before it enters a records, publishing, or sharing process.

Supported inputs

one PDF and a signer name
One Sign PDF job at a time through the current public workspace

Output

One PDF with a dated visible signature block on the final page.

Limitations to know

This tool does not verify identity, use a private signing key, create a trusted timestamp, or provide legal signature assurance.
Sign PDF cannot reconstruct source information that is absent, damaged, or inaccessible in the uploaded document.
Viewer, font, image, form, signature, and accessibility behavior can change after Sign PDF; compare important output with the source.
No Sign PDF result should be treated as legal, archival, accessibility, or compliance certification without the required independent review.

Privacy and document handling

Sign PDF uploads the selected source to configured object storage so the worker can process it.
The worker attempts to remove temporary Sign PDF workspace files after the job, which is separate from stored input and output retention.
Avoid using Sign PDF with confidential material unless the published storage and retention information is suitable for the document.

Stored input and output objects are deleted automatically: files uploaded without an account are removed about 24 hours after upload, and files belonging to a signed-in account are removed after 7 days. A scheduled sweep enforces this hourly against the object store itself. Workers attempt to remove per-job temporary directories after processing. This does not delete stored input or output objects.

Read the Privacy Policy and Security page for verified implementation details and open questions.

Troubleshooting

Sign PDF cannot start

Confirm the expected one PDF and a signer name finished uploading and every required Sign PDF option contains a valid value.

Sign PDF reports a processing error

Open the source locally, remove unsupported encryption where authorized, and retry Sign PDF with a smaller valid file.

Sign PDF output is not suitable

Inspect the final page placement and confirm recipients understand that the block is visual rather than certificate validation. If it still differs, retain the source and use a workflow designed for that document feature.

Still stuck? Review Help and common questions or contact support.

Frequently asked questions

Does Sign PDF replace my original file?

No. Sign PDF creates a separate stored output and does not edit the source on your device.

Is every Sign PDF result guaranteed to look identical?

No. Sign PDF depends on the source structure and processing engine, so important pages and features must be checked.

Should I delete my source after Sign PDF?

No. Keep the source until the Sign PDF output has been opened, compared, and accepted for its intended use.

How should I check my Sign PDF result?

Open every Sign PDF download and compare it with the unchanged source before sharing or deleting anything. Pay particular attention to this documented limitation: This tool does not verify identity, use a private signing key, create a trusted timestamp, or provide legal signature assurance.