Security & Stamping

Add a QR Code or Barcode to PDF

Create a QR code or barcode, position it on your PDF, and export a new file. Choose a code format, adjust its size and appearance, and select the pages to update.

Note: Codes are embedded as PNG images. Always scan the exported PDF before printing or sharing. Editing a digitally signed PDF may invalidate its existing signature.

Select a PDF file to Stamp

or drag and drop your document here

Browser-Based Processing. Processed entirely on your device
QUICK & EASY TUTORIAL

How to Stamp QR Code & Barcode on PDF in 3 Simple Steps

Process and convert your documents in seconds without downloading third-party software or creating an account.

01
STEP 01

Upload Your File

Choose a PDF from your device or load the sample document to try the editor.

Browser-Side Processing
02
STEP 02

Customize & Configure

Choose QR Code or Barcode, enter the content or identifier, and adjust the format, colour and size.

Precise controls • Live preview
03
STEP 03

Process & Download

Position the code, select the pages to update, then stamp and download your new PDF.

Instant Download • Zero watermark
TRUST & RELIABILITY

Why Users Prefer Our Stamp QR Code & Barcode on PDF

Engineered for maximum security, zero-latency in-browser compilation, and studio-grade document fidelity.

BROWSER-SIDE PROCESSING

Browser-Based PDF Processing

The supplied script reads the selected PDF in the browser and passes it to PDF.js and PDF-Lib for preview and export. The page also loads library scripts from external CDNs.

NO QUEUES

Browser-Based Processing

Preview pages, adjust the stamp and export a new PDF. Processing time depends on document size, page count and device performance.

STUDIO FIDELITY

Multiple Barcode Formats

Create QR codes or choose Code 128, EAN-13, UPC-A, Code 39 and ITF-14 barcodes using the loaded barcode library.

PRO CONTROLS

Adjustable Code Size and Contrast

Set the image size, foreground colour, background shield and opacity. Always test the exported code before printing.

UNLIMITED

Free to Use

Use the tool in the browser without creating an account. Browser memory and device limits still apply.

CROSS-DEVICE

Modern Browser Support

The page uses browser JavaScript and PDF libraries. Performance and compatibility can vary by device and browser version.

VISUAL WORKFLOW & DEMO

See How It Works: Before & After Stamp QR Code & Barcode on PDF

Experience lightning-fast document processing with browser-side processing in the supplied tool code and studio-grade visual output.

Before: Raw Document
Sample_Input_Document.pdf
16 Pages • 8.4 MB • Unoptimized
⚠️ Disorganized pages ⚠️ Large uncompressed size
Processed in < 0.3s Temporary Browser Memory
After: Optimized Output
Output_Processed_Document.pdf
Perfect Layout • Ready for Sharing
PNG Code Image Output
✓ PNG Image Embedding ✓ PDF Export ✓ Instant Download
SPECIFICATIONS & PLATFORMS

Supported Formats & Device Compatibility

The tool relies on current browser JavaScript support and the included PDF.js, PDF-Lib, QRCode.js and JsBarcode libraries. Actual compatibility depends on the browser, file and available device memory.

📄

PDF Input

  • ✓ PDF files that PDF.js can open
  • ✓ Password-protected files must be unlocked first
  • ✓ Damaged or unsupported PDFs may fail
  • ✓ Review signed PDFs before modifying them
⚡

Tool Limits

  • ✓ Maximum input size: 100 MB
  • ✓ Maximum document length: 500 pages
  • ✓ One PDF is processed per session
  • ✓ Large files require more browser memory
💻

Device Support

  • ✓ Use a modern desktop or mobile browser
  • ✓ Keep the browser tab open while processing
  • ✓ Available memory affects large documents
  • ✓ Touch and pointer input are supported
🌐

Required Browser Libraries

  • ✓ PDF.js for PDF preview
  • ✓ PDF-Lib for PDF editing and export
  • ✓ QRCode.js for QR code generation
  • ✓ JsBarcode for linear barcode generation
PRIVACY BY DESIGN

Browser-Side PDF Processing

The supplied tool script reads the selected PDF in the browser and processes it with PDF.js and PDF-Lib. The page also downloads library scripts from external CDNs.

🛡️

File Processing in the Browser

The supplied tool code reads the selected PDF into browser memory and uses PDF.js to display pages and PDF-Lib to create the output file.

🧹

Temporary Page Memory

The PDF data remains in the page's JavaScript memory while you use the tool. Reset the tool or close the tab after finishing.

⚖️

Understand External Requests

The selected PDF is not sent to an application upload endpoint by the supplied tool script. External CDN libraries, analytics and other site-wide scripts require a separate network review.

Browser-Side File Processing
External CDN Libraries
No Account Required
One PDF Per Session
TECHNICAL ARCHITECTURE

Engineered for Privacy & Efficiency

A transparent overview of the components and limits visible in the supplied QR and barcode PDF tool.

PDF.js
Page Preview
Renders the selected PDF page in a browser canvas.
PDF-Lib
PDF Export
Embeds the generated PNG image into selected PDF pages.
PNG Image
Code Output
QR codes and barcodes are raster images in the exported PDF.
100 MB
Input Limit
The updated frontend checks file size and page count before processing.
PDF.js Preview
PDF-Lib Export
PNG Code Images
Browser JavaScript
COMPLETE GUIDE & SPECIFICATIONS

The Complete Guide to Embedding QR Codes & Barcodes in PDF

Everything you need to know about technical execution, page formatting, structural integrity, and best practices.

1

How QR Codes and Barcodes Are Added to a PDF

Practical guidance for creating and checking PDF codes

The tool creates a QR code or barcode image in the browser, previews its placement, and embeds that PNG image into selected PDF pages with PDF-Lib.

  • ✓ QR code content: Add a web address, plain text, contact card details or another payload supported by the QR generator.
  • ✓ Barcode formats: Choose Code 128, EAN-13, UPC-A, Code 39 or ITF-14 and enter a value accepted by that format.
  • ✓ PDF output: The generated mark is embedded as a PNG image. It is not a vector barcode or a cryptographic signature.
2

Choose the Right QR Code or Barcode

Practical guidance for creating and checking PDF codes

QR codes are useful when a phone camera needs to open a link or read a larger text payload. One-dimensional barcodes are useful for compact identifiers that compatible scanners can read.

  • ✓ QR code: Use for URLs, contact information and plain text.
  • ✓ Code 128: Use for many alphanumeric shipping, inventory and reference identifiers.
  • ✓ EAN-13, UPC-A and ITF-14: Use only when the value follows the relevant retail or packaging format requirements.
3

Position and Size the Stamp

Practical guidance for creating and checking PDF codes

Choose one of the nine alignment positions, drag the preview, or click the page to set a custom position. Set width, height, margin and opacity before processing.

  • ✓ Page placement: Choose top, middle or bottom positions, or place the image manually.
  • ✓ Physical dimensions: Width, height and margin are entered in millimetres and converted to PDF points.
  • ✓ Page selection: Apply the mark to the first page, last page, all pages or a custom list of pages.
4

What Happens to the Original PDF?

Practical guidance for creating and checking PDF codes

The supplied script loads the source PDF in the browser and uses PDF-Lib to embed a PNG image on the selected pages. The tool creates a new downloadable PDF rather than editing the source file in place.

  • ✓ Existing content: Review text, links, forms, annotations and page appearance in the exported file.
  • ✓ Digital signatures: Modifying a digitally signed PDF can invalidate its existing signature. Keep an untouched original.
  • ✓ Password-protected files: The current workflow does not provide a password-entry interface for opening encrypted source PDFs.
5

Check QR and Barcode Quality Before Printing

Practical guidance for creating and checking PDF codes

A barcode can be embedded successfully and still fail to scan if it is too small, distorted, low contrast or printed without enough clear space around it.

  • ✓ Keep contrast high: Dark marks on a light background are generally easier to scan.
  • ✓ Use enough space: Do not crop the code or remove its quiet zone.
  • ✓ Test a sample: Scan the exported PDF on screen and on a printed proof before distributing a large batch.
REAL-WORLD APPLICATIONS

Tailored Solutions for Every Stamp QR Code & Barcode on PDF Workflow

Explore how professionals across law, finance, academia, and healthcare rely on our in-browser engine for daily document tasks.

⚖️
Legal & Contracts

QR Codes on Invoices

Add a QR code that contains a payment page, invoice reference or document lookup URL. Test the destination before sending the invoice.

✓ Indelible In-Browser Security • Zero Server Traces
📊
Corporate & Finance

Product and Inventory Labels

Place a supported product barcode on PDF labels or inventory sheets. Confirm the selected barcode format matches the identifier you use.

✓ Clean Professional Layout for Board Presentations
🎓
Academic & Research

Shipping and Packing Documents

Add a Code 128 or ITF-14 identifier to packing slips and shipping paperwork for compatible scanners.

✓ Preserves Math Formulas, Charts & Citation Footnotes
💼
HR & Operations

Event Tickets and Passes

Add a QR code containing a ticket reference or event check-in URL. Use a separate system to validate or redeem each ticket.

✓ Universal Compatibility Across Mobile & Desktop
🧾
Tax & Bookkeeping

Certificates and Document References

Place a QR code that links to a verification page or contains a document reference. The QR code itself does not authenticate the document.

✓ Court & Tax Authority Audit-Proof Formatting
🩺
Healthcare & Records

Multi-Page PDF Records

Apply the same QR code or barcode to the first page, last page, all pages or selected page numbers.

✓ 100% Sandboxed Local PDF workflow
DIAGNOSTICS & QUICK FIXES

Common Issues & Troubleshooting Fixes

Encountering an unexpected hurdle with your document? Here are the most effective solutions and diagnostics.

🔒

The PDF Will Not Load

Possible cause: The file may be damaged, password-protected, too large or unsupported by the browser PDF parser.

✓ Instant Solution

Try an unlocked copy, confirm the file opens in a PDF reader, and choose a smaller PDF if the browser runs low on memory.

📦

The QR Code Preview Does Not Update

Possible cause: The QR payload may be empty or too long for the selected error-correction level.

✓ Instant Solution

Enter a shorter payload and wait for the preview to finish updating before processing.

⚠️

The Barcode Value Is Rejected

Possible cause: Barcode formats have different character and length requirements.

✓ Instant Solution

Choose the correct format and enter a value that meets its requirements. EAN-13 and UPC-A require numeric data with the correct check digit behaviour.

📐

The Stamp Looks Too Large or Too Small

Possible cause: The stamp dimensions are physical millimetre values and may not suit every page size.

✓ Instant Solution

Adjust width and height, check the preview on the current page and review the exported PDF at 100% zoom.

📝

The Stamp Is in the Wrong Position

Possible cause: PDF pages can use different dimensions or rotations, and page ranges may include mixed layouts.

✓ Instant Solution

Check the selected page, set a custom position if needed and inspect pages with different orientation before sharing.

🔁

The Downloaded PDF Does Not Scan

Possible cause: The code may be too small, low contrast, distorted or printed without enough clear space.

✓ Instant Solution

Increase the code size, use a dark foreground on a light background, preserve the quiet zone and test the exported PDF with a scanner.

POWER TIP

Before sharing: Open the downloaded PDF, scan the code, and verify the destination or identifier. A QR code is a data carrier, not proof that a document is genuine.

QUESTIONS & ANSWERS

Frequently Asked Questions

Questions regarding dynamic QR codes, Code128 barcodes, error correction, and positioning.

Q Which QR code and barcode formats can I add to a PDF?

The tool can create QR codes and supports Code 128, EAN-13, UPC-A, Code 39 and ITF-14 barcode formats through its barcode library. Each barcode format has its own value requirements.

Q Can I move and resize the QR code or barcode?

Yes. Choose one of nine preset positions or drag the preview to a custom location. You can also set the width, height, margin and opacity.

Q Can I add a code to selected PDF pages?

Yes. Choose the first page, last page, all pages or enter custom page numbers and ranges such as 1, 3-5.

Q Will the QR code or barcode always scan after export?

Not automatically. Scanning depends on the code format, payload, printed size, contrast, quiet zone, print quality and scanner. Test the exported PDF before distributing it.

Q Are my PDF files uploaded by this tool?

The supplied tool JavaScript reads the selected PDF in the browser and processes it with PDF.js and PDF-Lib. The page loads its JavaScript libraries from external CDNs. This source review does not audit every site-wide network request or third-party script.

USER COMMUNITY & SUPPORT

Help Us Improve Stamp QR Code & Barcode on PDF

Encountered an issue with a document, or have an idea to make this tool better? Share your thoughts directly with our engineering team.