Tamper-evident.
Every signed PDF is cryptographically sealed. Change one character afterward and the signature breaks.
sign multiple W-9 at once
Batch sign W-9 forms in seconds
W-9s show up whenever someone needs vendor paperwork yesterday. The form is standard; the repeated signing should be standard too. PDFBatchSigner does the repeat work in one pass.
No account. No subscription. No server.
Live demo — Add documents to see each file auto-matched to a template, then sign the batch. Nothing leaves this page.
The specific problem
W-9 Forms usually means W-9, taxpayer identification form, vendor packet, certification signature, and date field. The names change. The signature work does not.
That is why this page exists for sign multiple W-9 at once, not for generic PDF signing. This is for the stack, the repeat fields, and the moment where one-by-one signing stops making sense.
How it works for W-9 forms
01
Template the repeat spot.
Mark signature and date on standard W-9 PDFs on a sample PDF. Keep the template for the next batch.
02
Drop the stack.
Add the folder of PDFs. PDFBatchSigner looks for the same form structure and places the signature where it belongs.
03
Review, then seal.
PDFBatchSigner already includes common form templates, and custom W-9 templates are quick to create. One look, one click, tamper-evident output in the folder you choose.
Real signatures, not just pictures of one.
Shows in any reader.
This is a verifiable PDF signature built into the file, not an image pasted on a page.
Really you.
Use a device-generated key protected by Secure Enclave when available, or import a supported .p12 identity.
Two ways to sign, your choice.
Default
Device-protected key
PDFBatchSigner signs with a key generated on your device. It uses Secure Enclave when available and a Keychain-protected fallback otherwise.
Advanced
Bring your own .p12
Already have a signing certificate from a trusted authority? Import your .p12 and your signatures carry your verified identity, recognized in Adobe Acrobat and beyond.
W-9 fields to verify before signing
- Legal name
- Business name
- Tax classification
- TIN area
- Certification signature and date
FAQ
Can I batch sign W-9 forms on iPad?
Yes. PDFBatchSigner works on Mac, iPhone, and iPad, with templates and signatures synced through your own iCloud.
Are these real PDF signatures?
Yes. Each signed PDF is cryptographically sealed. If the file changes afterward, the signature breaks and PDF readers can show that the document was altered.
Do my W-9 forms leave my device?
No files go to a PDFBatchSigner server. Signing happens on your device; templates and signatures sync through your own iCloud.
Can I use my own signing certificate?
Yes. The default key is generated on your device, using Apple's Secure Enclave when available and a Keychain-protected fallback otherwise. You can also import a supported .p12 identity.
Can I sign multiple W-9 forms at once?
Yes. Add the W-9 PDFs, review the certification signature placement, then sign the batch.
Drop the stack, done.
Get one launch notification when PDFBatchSigner becomes publicly downloadable for Mac, iPad, and iPhone.
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Free download. 200 signed documents included. Optional $19.99 US lifetime unlock. No subscription.