How to Use VeryPDF JavaScript PDF Annotator API to Add Color, Highlight, and Strikeout Annotations Effortlessly

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How to Use VeryPDF JavaScript PDF Annotator API to Add Color, Highlight, and Strikeout Annotations Effortlessly

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Easily highlight, strike through, and annotate PDFs in any browser with the VeryPDF JavaScript PDF Annotator API. No plugins, just powerful control.

How to Use VeryPDF JavaScript PDF Annotator API to Add Color, Highlight, and Strikeout Annotations Effortlessly

Every week, I get sent contracts, invoices, and scanned reports from multiple teams. The first thing I used to do? Open a separate desktop app, download the PDF, make notes, save it, upload it again, send it back and hope the version history didn't get messed up.

Honestly, it was a pain.

I just wanted a quick way to highlight sections, strike out outdated content, and add comments directly in the browser without downloading anything. That's when I found VeryPDF JavaScript PDF Annotator Source Code License.

It changed the way I work. Here's why.

A Real Browser-Based PDF Annotation Tool That Just Works

I stumbled upon VeryPDF JavaScript PDF Annotator API while hunting for a lightweight PDF markup tool I could embed into a client portal. Most solutions either required bulky plugins or didn't support real-time collaboration. This one? Built entirely with HTML5 and JavaScript. No downloads. No plugins. It just loads in the browser Chrome, Firefox, Safari, you name it and runs flawlessly on Windows, Mac, Linux, iOS, and Android.

So if you're like me juggling feedback loops across documents this is a tool worth checking out.

What It Does (And Why That Matters)

You can embed this into your app or workflow to:

  • Draw directly on PDFs

  • Highlight text

  • Strikeout irrelevant content

  • Change annotation colours

  • Add point comments, area comments, or just type text notes

  • Support for 50+ file formats not just PDFs (think Word, Excel, images, CAD, etc.)

It's not just a basic highlighter.

The annotation layering system lets multiple users mark up the same file. You can choose whether to burn annotations into the final PDF or keep them editable. That's huge for teams working on drafts or legal reviews.

And yes, I've used this exact tool to:

  • Review contracts in real time with legal

  • Mark up screenshots and CAD files during client calls

  • Highlight issues in scanned TIFF documents from archives

3 Key Features I Loved Using

1. Color and Highlight Customisation

It might sound minor but being able to change the colour of highlights or text annotations made my markups way easier to skim. I could mark urgent items in red, notes in blue, and strikeouts in grey.

Tip: Use colour to build your own system. It's surprisingly effective when reviewing with others.

2. Cross-Platform Freedom

I tested this on Windows, macOS, iPad, and even an older Android tablet. It worked consistently across all platforms no lag, no crashes. Clients could view and annotate without me walking them through installations.

3. Fast, Responsive Viewer

I've used clunky viewers that take forever to render large PDFs. Not here. Even with complex layouts and thumbnails active, the performance held up. Zooming in, page navigation, and search were fast.

Why It's Better Than Most Tools Out There

Let's be real most browser-based PDF editors are either too simple or too bloated.

  • Adobe's cloud tools? Great but overkill, expensive, and require accounts.

  • Free browser annotators? Often lack advanced options or break with large files.

  • Other APIs? Charge per annotation or per user, and can be a nightmare to customise.

VeryPDF offers the source code license. That means full control. You can integrate it, tweak it, deploy it however your workflow demands.

Final Thoughts: A Serious Time-Saver

If you're working with contracts, reports, manuals, or any documents that need feedback this API is a game-changer.

You can highlight text, strike through outdated info, and add comments without any extra tools.

I'd highly recommend this to developers building apps, legal teams, educators reviewing papers, or any business needing a better PDF feedback loop.

Start your free trial and explore the live demo here:
https://veryutils.com/html5-pdf-annotation-source-code-license

Need Custom Features? VeryPDF Has You Covered

VeryPDF isn't just a product it's a platform. They offer custom development services for businesses that need tailored document solutions.

Whether you're working on Windows, macOS, Linux, or mobile, they can help you:

  • Create PDF tools in C/C++, Python, JavaScript, PHP, .NET

  • Build virtual printer drivers that intercept print jobs

  • Add barcode recognition, OCR, digital signatures, and more

  • Convert, split, annotate, secure, or watermark documents on the fly

  • Integrate font management, DRM protection, or cloud-based viewers

Got something specific in mind?

Talk to their dev team at: http://support.verypdf.com/

FAQs

1. Can I embed this annotator into my web app?

Yes. The JavaScript HTML5 PDF Annotator is designed for integration into web and mobile apps. Source code access gives you full control.

2. Does it work with file types other than PDF?

Absolutely. It supports over 50 formats including Word, Excel, PowerPoint, TIFF, PNG, SVG, CAD files, and more.

3. Can multiple users annotate the same document?

Yes. The annotation layering system supports multi-user collaboration with real-time updates.

4. Are annotations burned into the document?

You choose. You can either keep them as editable layers or burn them into a final version before download or sharing.

5. Is it mobile-friendly?

Yes. The annotator runs on iOS and Android browsers with full functionality.

Tags / Keywords

  • JavaScript PDF Annotator

  • PDF annotation API

  • HTML5 PDF markup tool

  • PDF highlight and strikeout

  • Web-based PDF annotation

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