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Creative Management & Compliance Guide
Learn what creatives you can use in Everflow, how to format them to prevent upload errors, and how to use them to optimize campaign performance.
Critical Compliance: Read Before Uploading
Most upload failures happen because of simple formatting errors. Follow these three rules to ensure your files work immediately.
1. The "Lowercase" Rule (Case Sensitive)
- The Rule: File extensions MUST be lowercase.
- Bad: banner_ad.JPG or video.MP4
- Good: banner_ad.jpg or video.mp4
- Why? Our system is case-sensitive. .JPG is treated as an unknown file type.
2. No Special Characters
- The Rule: Filenames (even those inside a ZIP file) must use letters, numbers, underscores (_), or hyphens (-).
- Bad: summer sale banner!.jpg or ad(1).png
- Good: summer_sale_banner.jpg
3. HTML Encoding (UTF-8 Only)
- The Rule: HTML documents must be saved in UTF-8 format.
- Constraint: UTF-16 is not supported. Emojis are not allowed in the code (they will break the display).
Supported File Types Reference
Use this table to check your file limits and naming conventions.
All Types
Archive
Email/HTML
Image
Video
Text
Link
| Creative Type | Acceptable File Types | Max File Size | Example Filename |
|---|---|---|---|
| Archive Adds a folder of separate creatives |
.zip file only that includes: .jpg / .jpeg .png .gif .bmp .svg .tiff / .tif .webp .ico .heic .mp4 .avi .mov .wmv .flv .mkv .webm .mpeg .3gp .ogv |
20 MB limit for photo files 100 MB limit for video files |
all_banners.zip |
| Email or HTML | .zip file only that includes: .html (1 only) .jpg / .jpeg .png .gif .bmp .svg .tiff / .tif .webp .ico .heic |
20 MB | email_template.zip |
| Image | .jpg / .jpeg .png .gif .bmp .svg .tiff / .tif .webp .ico .heic |
20 MB | promo_banner.jpg |
| Link | URL | N/A | https://example.com |
| Text | .txt .csv .log .html .rtf .doc .docx .odt |
20 MB | email_copy.txt |
| Thumbnail | .jpg / .jpeg .png .gif .bmp .svg .tiff / .tif .webp .ico .heic |
20 MB | video_thumb.jpg |
| Video | .mp4 .avi .mov .wmv .flv .mkv .webm .mpeg .3gp .ogv |
100 MB | social_ad.mp4 |
| Bulk Add Adds multiple creatives at one time |
.zip file only that includes: .jpg / .jpeg .gif .bmp .png |
20 MB limit per image file | bulk_images.zip |
No creative types match your search. Try different keywords.
Advanced Creatives: HTML vs. Email
While these look similar, they function differently in the platform.
The Difference
- HTML Creatives: Standard banners or landing page code.
- Email Creatives: Require two extra mandatory fields: Subject Line and From Address. This allows Partners to use your template directly in their mailing systems.
The "Build from ZIP" Tool
Stop manually pasting code. When you upload a .zip file for an HTML/Email creative, Everflow automatically:
- Extracts the .html file and pastes the code into the editor.
- Hosts all images/assets found in the folder.
- Rewrites the image paths in the code to point to our CDN.
Optimization Strategy: Custom Landing Pages
Did you know you can change where a user lands based on the specific image they clicked?
The Strategy:
- You have two creatives: Red_Banner.jpg and Blue_Banner.jpg.
- You want Red_Banner clicks to go to /red-landing-page and Blue_Banner to go to /blue-landing-page.
The Setup:
Reporting: Which Creative Performs Best?
Don't just guess which banner works. Measure it.
Result: You can now see exactly which creative asset generates the most revenue, allowing you to pause the underperformers.
