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Resize Image for A3 (300 DPI)
Resize any photo to 3508 x 4961 pixels, the right size for A3 (300 DPI). A3 poster at print resolution. Nothing uploaded.
or drop image here
JPG, PNG, WebP. Any size works.
0 KB uploaded. Your file never leaves this browser tab.
Open your browser's Network tab while you use this tool, you will see zero data sent to any server.
IYONM
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Your files
Stay on your device
Uploaded to a server
File size limit
None
Capped on free plans
Works offline
Yes
No
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Never
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How to use
📁
1. Add your image
Drop in a JPG, PNG, or WebP.
📐
2. Fit to 3508 x 4961
We scale it to fit fully inside the frame.
💾
3. Download
Save your A3 (300 DPI) ready image.
FAQ
What is the correct size for A3 (300 DPI)?
3508 x 4961 pixels. A3 poster at print resolution.
Are my images uploaded?
No. Resizing runs entirely in your browser. Your image never leaves your device.
Will the image look stretched?
No. We fit the whole image inside the frame with no distortion.
Is this free?
Yes. Free, no signup, no limits.
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