Time-saving Apps for KDP Self Publishers.

KDP Doc Sizer

KDP Doc Sizer

Change your Google Doc to exact KDP sizes in just a click.

Perfect for Self-Publishers
KDP Doc Sizer is the easiest way to resize your Google Docs to match Amazon Kindle Direct Publishing (KDP) book formats. Choose from dozens of built-in sizes, or set your own custom page dimensions and margins.

Free and Premium Options
✅ Free resize to KDP-compatible Standard sizes
🔓 Upgrade for Standard + Larger resizes, margin editing, and custom sizes
💳 One-time or monthly payment options available

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Simple Pricing

Free Version

  • Try out the Add-On
  • Resize to Standard KDP sizes completely free
  • Great for new or infrequent publishers

Try the Add-On.

Monthly: $4.99/month

  • All Standard AND Larger KDP Sizes
  • Custom Resize to your own dimensions
  • Custom Margins
  • Set your own custom sizes

One-Off: $29.95 lifetime

  • All Standard AND Larger KDP Sizes
  • Custom Resize to your own dimensions
  • Custom Margins
  • Set your own custom sizes

FAQ: Installation, Pricing and Features
How do I install the add-on?

Click THIS LINK to install KDP Doc Sizer via the Google Workspace Marketplace, Google's official store for installing add-ons.

How do I use it?

Once installed, you'll find the add-on under "Extensions". Click to open it, and you'll see the sizes in the sidebar. Just click to resize. Screenshots below!
How do I access the non-standard sizes and custom resize/margins?

After installing the add-on, you can resize to standard sizes for free. No signup, no payment.

However, to use the 'premium' features such as custom sizes, custom margins, and non-standard larger sizes, you can upgrade to premium. To do that, just click the buttons on this page - either a one-off lifetime purchase, or a monthly subscription.
How much does the add-on cost?

Most of the features are completely free to use. Just install it, and start resizing.

For more advanced features, you can upgrade to the Premium paid version for a small fee of $4.99/month or $29.95 one-time lifetime subscription.

Free: Resize to all standard KDP sizes.

Paid: Resize to non-standard KDP larger sizes; resize to your own custom size; set your own custom mragins.
Where can I see it in action?

You can see screenshots below, or on the add-on page here. Or, you can just install it and try it out for yourself.
I've paid for the premium version. Now what?

First up - thank you! We really appreciate your support.

If you've paid for the premium version, there's nothing else you need to do. Our system will register your email address as having paid. As long as you're logged in with that email address (in the Google Doc) you're editing, it will link up and give you access to the premium features.
What's the difference between installing it and subscribing to the paid version?

You can install the add-on completely free here and start using it in 20 seconds.

Optionally, you can upgrade to the paid version (via the links on this website) to use premium features.

Screenshots