StampIf is a web-based PDF stamping tool that applies visible marks to PDF documents using rules. You define which pages to stamp — every page, every Nth page, specific pages, or pages containing a keyword — upload a PNG stamp image, and StampIf processes all pages automatically without you opening a single file.

What is PDF stamping?

PDF stamping is the process of embedding a visible mark — such as APPROVED, CONFIDENTIAL, PAID, VOID, or a company seal — directly into the pages of a PDF. StampIf flattens every stamp into the document content layer, making it permanent and impossible to hide or remove through a standard PDF reader.

What is the difference between a stamp and a watermark?

A watermark sits behind document content at reduced opacity and is used for background branding (DRAFT, CONFIDENTIAL). A stamp sits on top of content at full opacity and signals document status (APPROVED, PAID, VOID). StampIf supports both — placement and opacity are fully configurable per job.

What stamp images can I use?

Any PNG image works: text marks such as APPROVED, PAID, CONFIDENTIAL, FOR CONSTRUCTION, or VOID; company seals and logos; handwritten signature scans; revision identifiers; or custom compliance marks. PNG files with a transparent background blend cleanly over document content. There is no restriction on image design.

How does rule-based stamping work?

When configuring a stamp job you choose a page selection rule: Every page stamps all pages, Every Nth page stamps on a repeating interval (e.g. every 10th page), Specific pages targets a list of exact page numbers, and Text match stamps only pages that contain a keyword or phrase. Rules are reusable — upload a new document and the same rule applies automatically.

Does StampIf work on scanned PDFs?

Yes for stamping. StampIf applies stamps visually to every page regardless of whether the PDF was digitally created or scanned. Note: the text-match rule requires a searchable text layer, which scanned PDFs typically lack unless they have been processed by OCR software beforehand.

Are my uploaded PDFs stored permanently?

No. Documents are processed and then automatically deleted from StampIf servers after your download is ready. Your files are never shared, indexed, or used for any purpose other than completing your stamp job.

Is StampIf free to use?

Yes. StampIf has a free plan that lets you stamp up to 100 pages per month with no credit card required. A Pro plan is available for teams that need unlimited monthly processing, multi-file batch jobs, saved stamp presets, and priority support.

StampIf is a web-based PDF stamping tool that applies visible marks to PDF documents using rules. You define which pages to stamp — every page, every Nth page, specific pages, or pages containing a keyword — upload a PNG stamp image, and StampIf processes all pages automatically without you opening a single file.

What is PDF stamping?

PDF stamping is the process of embedding a visible mark — such as APPROVED, CONFIDENTIAL, PAID, VOID, or a company seal — directly into the pages of a PDF. StampIf flattens every stamp into the document content layer, making it permanent and impossible to hide or remove through a standard PDF reader.

What is the difference between a stamp and a watermark?

A watermark sits behind document content at reduced opacity and is used for background branding (DRAFT, CONFIDENTIAL). A stamp sits on top of content at full opacity and signals document status (APPROVED, PAID, VOID). StampIf supports both — placement and opacity are fully configurable per job.

What stamp images can I use?

Any PNG image works: text marks such as APPROVED, PAID, CONFIDENTIAL, FOR CONSTRUCTION, or VOID; company seals and logos; handwritten signature scans; revision identifiers; or custom compliance marks. PNG files with a transparent background blend cleanly over document content. There is no restriction on image design.

How does rule-based stamping work?

When configuring a stamp job you choose a page selection rule: Every page stamps all pages, Every Nth page stamps on a repeating interval (e.g. every 10th page), Specific pages targets a list of exact page numbers, and Text match stamps only pages that contain a keyword or phrase. Rules are reusable — upload a new document and the same rule applies automatically.

Does StampIf work on scanned PDFs?

Yes for stamping. StampIf applies stamps visually to every page regardless of whether the PDF was digitally created or scanned. Note: the text-match rule requires a searchable text layer, which scanned PDFs typically lack unless they have been processed by OCR software beforehand.

Are my uploaded PDFs stored permanently?

No. Documents are processed and then automatically deleted from StampIf servers after your download is ready. Your files are never shared, indexed, or used for any purpose other than completing your stamp job.

Is StampIf free to use?

Yes. StampIf has a free plan that lets you stamp up to 100 pages per month with no credit card required. A Pro plan is available for teams that need unlimited monthly processing, multi-file batch jobs, saved stamp presets, and priority support.

Automated PDF Stamping & Rule-Based PDF Stamps | StampIf

StampIf

Document stamping, done right

Automate PDF stamping with rules, not repetitive clicks.

Stamp every PDF like it matters.

Automatically stamp PDFs based on page number, intervals, text conditions and custom rules. Batch-process approval stamps, seals and document marks with precise placement.

No credit card required · Free to start

See all stamping options →

APPROVED

Trusted by teams who process paperwork all day

Legal contracts

Approved, executed, redlined

Invoices & finance

Paid, void, reconciled

Property & compliance

Filed, permitted, inspected

Certificates & records

Verified, issued, archived

Engineering drawings

Approved, revised, released

How it works

Three steps. Every time.

No learning curve, no menus to hunt through. StampIf is built so the stamp is always one click away from the document.

Upload your PDF

Drag in a contract, invoice, or certificate. Batches of hundreds are handled the same as one.

Place the stamp

Click to position — APPROVED, PAID, CONFIDENTIAL, or a custom mark. Rules apply it automatically next time.

Export, done

A stamped, flattened PDF lands in seconds. Original formatting and signatures stay untouched.

Built for volume

A tool that respects your queue.

Batch stamping

Apply one stamp across an entire folder of documents in a single pass — no repetitive clicking.

Audit-ready output

Every stamp is flattened into the document layer, timestamped, and impossible to silently remove.

Precise placement

Pixel-level positioning with page-aware anchoring, so stamps land correctly no matter the layout.

Built for speed

Sub-second processing per page. Built for people who stamp hundreds of documents a week.

All stamping modes

Every way you might need to stamp.

From a single document to a folder of hundreds, StampIf has a mode purpose-built for the job.

PDF StampingCore stamp placement: position, content, and page targeting in one tool.

Automated StampingSet a rule once — every page, specific pages, or intervals — and never click again.

Batch PDF StampingSubmit an entire folder of PDFs as one job and download a ZIP of stamped results.

Conditional StampingStamp only the pages that contain a specific keyword or phrase — everything else stays untouched.

PDF Approval StampsApply APPROVED, PAID, VOID, CONFIDENTIAL, or a fully custom mark in seconds.

Stamp Every Nth PageStamp page 1, then every 5th page, odd pages only — precise interval targeting.

PDF Watermark AutomationApply diagonal or full-page watermarks automatically across batches of documents.

“We stamp around 400 closing documents a month. StampIf cut what used to be a two-day task down to an afternoon.”

Priya Anand

Operations Lead, Kessler & Voss LLP

“The batch rules mean our AP team never has to touch a paid invoice by hand again. It just works, quietly, every day.”

Marcus Webb

Controller, Fenwright Logistics

Why StampIf

Stop stamping PDFs by hand in a design tool.

Most teams still open a PDF editor, paste in a scanned stamp image, and nudge it into place — one document at a time. StampIf turns that into a rule you set once and trust forever.