Access the Image Library
Admins can access the Image Library from the Admin section.
Click Admin in the upper left.
Go to Company.
Select Image Library.
From here, you can:
Upload images
Create shared folders
View your folder structure
Upload Images
You can upload images in several ways.
Drag and Drop Uploads
Drag one or multiple images directly into the Image Library.
You can drag files from:
The standalone Image Library
The Image Library inside the builder
Drop images into:
The main library
A specific folder
Folder breadcrumbs to upload directly into that location
You can also:
Upload more than 100 images at once.
Track upload progress for every file.
Retry failed uploads without starting over.
Supported File Types
You can upload the following image formats:
JPEG
PNG
GIF
TIFF
WEBP
Note: WEBP images are supported for upload. However, they are not supported in email content. If you upload a WEBP image, use it in landing pages only.
Upload Limits
Recommended maximum file size: 2 MB
This helps optimize deliverability and performance.
Maximum allowed file size: 10 MB
Uploads larger than 10 MB generate an error message.
Manage Default Alt Text
Store default alternative text (alt text) with each image to improve accessibility across your content.
Add or Edit Default Alt Text
You can add or update default alt text directly from the Image Library.
You do not need to open each image individually.
The default alt text is automatically applied whenever you add the image to new content.
View Alt Text in the Library
The file list displays each image's default alt text.
This makes it easy to identify images that need updates.
AI-Generated Alt Text
Artificial Intelligence (AI) generated alt text suggestions remain available in the builder for:
JPEG
PNG
WEBP
These suggestions can help you write accessible image descriptions more quickly.
To Manage Access
Control who can view, edit, and manage each folder using customizable permissions:
Click the Edit icon on any folder to open the permissions panel.
By default, all users have full access. To restrict access, remove the default setting using the trash can icon.
Click Add Permission and choose from the following access types:
Everyone – All users in your account
User – Specific individual users
Role – Based on assigned role (Builder, Approver, Administrator)
Brand – Based on assigned brand
Each permission type allows you to enable or disable:
Read – View folder contents and insert images into emails
Write – Upload, edit, and delete images
Manage Folders – Change folder structure and permissions
You can create multiple combinations for fine-grained control.
Subfolder Access
Subfolders can either:
Inherit permissions from their parent folder
Use custom rules set specifically for the subfolder
Role-Based Access
Go to Company Settings > Roles, select a role, and click View Permissions to adjust:
Update Folder Permissions – Allows the role to change folder permissions
Read All Folders – Allows full read access, even when restricted (default for Admins)
Supported File Types and Upload Limits
You can upload the following image formats:
JPEG
PNG
GIF
TIFF
Best practices:
Recommended max size: 2 MB (to optimize deliverability and performance)
Maximum allowed size: 10 MB
Uploads over 10 MB will generate an error message.
Troubleshooting Image Upload Fails
If an image fails to upload:
Confirm the file type is supported.
Verify the file extension.
Remove special characters from the file name.
Special characters in file names can prevent successful uploads to the Knak Image Library.
FAQs
1. How can I control the default static image for a GIF?
The first frame of the GIF is used as the default static image. Make sure the first frame looks good on its own.
2. How can I add a link to a PDF in my asset?
Upload the PDF to the Image Library in the admin panel. Then, link it in your asset (e.g., add it to a button).
Need more help? Contact support via live chat within Knak using the chat bubble in the bottom right corner or email support@knak.com.