Upload Tool


  1. Tool intro
  2. Sources for images and files
  3. Supported formats
  4. Image editing
  5. Quality check
  6. Further details


1. Tool intro

The Upload tool allows you to upload your images and files to the customizer to personalize your items.


2. Sources for images and files

You can:

  • Upload multiple images from local storage or mobile image gallery;
  • Import images from Instagram or Facebook;

3. Supported formats

  • Standard formats: JPGPNG and SVG

    TIP: if the file is in SVG format, you can change the colors of the artwork.

  • Files in PDF, AI, and EPS

    upload files in PDF, AI, and EPS.

    If you upload a vector PDF, EPS, or AI file, Zwelli.com automatically converts it to an SVG file in order to keep it as a vector file in the final print-ready file.

IMPORTANT: After the process to generate print-ready files, some PDF files may show some differences (transparency, saturation, missing elements, etc) from the original uploaded. We double-check the original PDF file uploaded before fulfilling the order since we provide you with original files along with processed print-ready files.

4. Image editing

4.1 Editing tools and filters

Zwelli.com provides you with an advanced image editor which empowers you with editing tools, effects and filters.

In particular, you can use the following tools to edit an image:

  • Filters
  • Adjustments
  • Focus
  • Brush
  • Frames
  • Overlay

You can access those tools by clicking the “edit & filters” button when you upload the image:








4.2 Masks

Zwelli.com provides you with  gallery of masks that you can use with the images you upload.


4.3 Other effects

For those who want our engraved products, Zwelli.com offers a specific feature to automatically convert images and artworks (along with texts) to simulate engraving.

The tool is very flexible and can also be used by those who do not sell engraved products to apply automatic effects on images, such as:

  • Greyscale
  • Black and white
  • Black and transparent
  • Silhouette
  • Dark and light
  • Blend modes

5. Quality check

Zwelli.com automatically checks if the quality of the uploaded image is good enough for printing. The quality check calculation is based on the size of the entire print area and the DPI value that you require (by default, the DPI required is 300 but you can change it by creating a Printing Method). When the quality is not good, you will be informed by a warning message that suggests uploading a better quality image.

6. Further details

  • Uploaded images are stored in the image gallery for reuse. When you access the customizer from the same browser, you can find the images that you’ve previously uploaded in the Upload section.