Resize Image to Postcard Size
Prepare a postcard photo with a 4x6 inch default, then adjust the size, orientation, DPI, quality, or format to match your printer or submission requirements.
Upload Your Image
Drag & drop or click to select your image (Max 20MB)
Supports JPG, PNG, GIF, WEBP formats
Multiple images? Resize them all at once
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Prepare postcard photos for real print requirements
Start with a familiar 4x6 inch canvas while keeping control over orientation, output detail, framing, and service-specific dimensions.
4x6 inch postcard default
Open the tool with a common 4x6 inch postcard photo size already selected, without treating that size as the only postcard standard worldwide.
Editable print dimensions
Change the width and height when a postal service, print shop, event organizer, or online form requests a postcard specification other than 4x6 inch.
Portrait or landscape orientation
Use a vertical postcard portrait or reverse the dimensions for a horizontal travel scene, invitation, announcement, or promotional card.
Adjustable print DPI
Choose a supported DPI for photo printing or digital submission, using the destination service guidance instead of assuming every postcard workflow is identical.
Composition preview
Inspect faces, captions, borders, and key artwork before export so a change in proportions does not remove important content near the postcard edges.
Local photo processing
Resize personal postcard images in your browser, so the source photo is not uploaded to ResizeBox while you prepare the downloadable result.
Resize a postcard photo in three steps
Use the 4x6 inch starting point, then compare the settings with the exact print or submission instructions you received.
Upload the postcard photo
Choose the original portrait, landscape, artwork, or promotional image you want to prepare for postcard use.
Confirm size and orientation
Keep 4x6 inch or enter the required alternative, select print DPI, and position important content inside the frame.
Resize and check the result
Process the image locally, download it, and compare the dimensions and preview with the printer or form instructions.
Prepare your postcard photo
Start at 4x6 inch, choose the right orientation and DPI, and create a file that matches your actual print or submission brief.
Postcard photo resizing FAQ
Practical answers about 4x6 inch defaults, regional postcard sizes, print DPI, orientation, cropping, and submissions.
The page starts at 4x6 inch, a common postcard photo and printing size. Postcard dimensions differ between countries, postal systems, printers, and submission services, so confirm the required specification before using the result.
No. It is the default used by this tool, not a universal standard. Other postcard formats and regional postal specifications may use different dimensions, proportions, margins, or bleed requirements.
Yes. Choose the custom option and edit the width and height when your print shop, postal service, school, event, or online submission provides another postcard specification.
Either orientation can work. Keep 4x6 inch for portrait or reverse the dimensions for landscape, then inspect the composition so people, text, and important artwork remain inside the final frame.
Use the DPI requested by your printer or service. 300 DPI is common for detailed photo printing, but the best setting depends on the source resolution and the destination workflow. Increasing DPI cannot restore missing detail.
The source photo and postcard canvas may have different proportions. Reposition the image and inspect the preview so faces, captions, logos, borders, and other important elements are not cut off.
Yes, when the generated dimensions, orientation, format, and file quality match the receiving service. Always follow the current submission instructions if they differ from this page’s 4x6 inch default.
No. Image processing takes place locally in your browser. You retain control of the source and downloaded file, but should still review the final result before printing or submitting it.
Popular resize presets
Jump to the most commonly used image sizes for your projects