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How to use? Read our guide.

Free online image dimension annotation

Add Dimensions and Size Labels to Images

Upload an image, draw dimension lines or arrows, type the size or note you want to show, and export the result. Use it for product photos, ecommerce dimension images, mockups, furniture, packaging, screenshots, and design handoff.

Click or drag image to this area to upload

Support JPG, PNG, GIF formats, file size no more than 10MB

Annotation Property Settings

Annotation Content
Enter content to display on dimensionSet default content for new dimensions
Text Position
Above Annotation
Annotation Style
Line Settings
Line Style
Line Width
1px5px10px
Line Color
#000000
Text Style
Select Font
Arial
Font Size
8px16px32px72px
14px Sample Text
Font Color
#000000
Font Background Color
#FFFFFF,95%

Keyboard shortcuts

  • Tab/Shift+Tab: Navigate between annotations
  • Arrow keys: Move between annotations
  • Delete/Backspace: Delete selected annotation
  • Escape: Cancel selection
  • Ctrl+Z: Undo
  • Ctrl+Shift+Z or Ctrl+Y: Redo
  • Ctrl+S: Export PNG
  • Ctrl+0: Reset zoom
  • Ctrl+1: Fit to screen

How to add dimensions to an image

1

Upload an image

Choose a JPG, PNG, or GIF. The file is processed locally in your browser and is not uploaded to BaseToolbox.

2

Draw and label

Place dimension lines, arrows, or text, then type a manual value such as 42 cm, W × H × D, spacing, or a short callout.

3

Style and export

Adjust line, color, and text settings, then export the annotated image as PNG, JPG, or SVG.

One editor, different dimension-image workflows

Closely related phrases can share this main tool page. A separate scenario page is useful only when the workflow, examples, and guidance are materially different.

Product and ecommerce dimension images

Create manual product-size callouts for Amazon, Ozon, Shopee, TikTok Shop, Temu, AliExpress, Lazada, eBay, Shopify, Etsy, or your own store.

Open the product image dimension maker

Design, furniture, packaging, and mockups

Add verified dimensions, arrows, spacing notes, and visual handoff comments to design images without changing the source file.

Open the design dimension annotation tool

Enter verified values; the tool does not measure objects automatically

The editor displays the dimensions and notes you type. It does not infer real-world size from pixels, calibrate a photo, read CAD dimensions, or resize an image to a marketplace's pixel specification.