Does changing DPI resize the image?

No. This tool updates DPI metadata only. Pixel dimensions stay exactly the same. It is a lossless process.

How do I convert an image to 300 DPI?

Upload your image to our converter, enter '300' in the target DPI field, click 'Update DPI', and download the result. It takes just seconds.

What is the best DPI for printing?

300 DPI is the industry standard for high-quality printing. Some large format prints may use 150 DPI, while fine art prints might use 600 DPI.

Which formats does the image DPI converter support?

This converter supports PNG and JPEG (.jpg, .jpeg) files. The conversion is performed entirely in your browser for maximum privacy.

Is this online DPI converter free?

Yes, our Image DPI Converter is 100% free to use with no registration or watermarks.

Image DPI Converter

Change DPI metadata for PNG and JPEG without resizing. Convert 72 DPI to 300 DPI in seconds for print-ready files.

Click or drag an image here

Supported: .png, .jpg, .jpeg

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Target DPI

Updates metadata only. Pixel dimensions stay unchanged.

How to Use the Online Image DPI Converter

Changing your image's DPI (Dots Per Inch) is simple and takes only a few seconds. Follow these steps:

Upload: Click the upload area or drag and drop your PNG or JPEG file.
Select DPI: Enter your target DPI (e.g., 300 for high-quality printing) or use one of the quick presets.
Convert: Click "Update DPI" to process the image metadata locally in your browser.
Download: Hit the "Download" button to save your new file instantly.

What Is DPI and Why Does It Matter?

DPI stands for Dots Per Inch. It is a piece of metadata stored within image files that tells printers and layout software how many pixels should be squeezed into one inch of physical space.

An image that is 3000x2000 pixels will look identical on a screen whether it's set to 72 DPI or 300 DPI. However, when printed, the 300 DPI version will be much sharper and smaller, while the 72 DPI version will be larger and potentially pixelated.

Convert Image DPI to 300 for Professional Printing

Most professional printing services, publishers, and design workflows require images to be set to 300 DPI. Our free Image DPI Converter allows you to update this tag without re-encoding the image data, ensuring zero loss in quality. It is the perfect tool for:

Preparing photos for high-quality lab prints.
Meeting submission requirements for academic journals or magazines.
Optimizing design assets for packaging and brochures.
Quickly checking and fixing DPI metadata for client deliverables.

Features of Our Free DPI Converter

Unlike other online tools, our converter offers several key advantages:

100% Free: No hidden costs or registration required.
Privacy First: Your images never leave your computer. All processing happens in your browser.
Lossless Update: We only change the metadata; your image pixels remain untouched.
Support for PNG & JPEG: Works with the most common image formats used in design.

Privacy & Security

At CusImage, we value your privacy. Our online image DPI converter uses client-side JavaScript to modify your file's header. This means your sensitive photos or proprietary designs are never uploaded to our servers, making it 100% secure and private.