Set any JPG or PNG image to 300 DPI in one click, without losing quality. How it works: Choose one or more JPG or PNG images. Keep 300 DPI selected (you can pick another value if needed). Optionally enter the required print size in centimetres.
About the 300 DPI Converter
This 300 DPI converter changes the resolution recorded in your image to 300 dots per inch. 300 DPI is the standard for sharp photo prints and professional printing, and it is often requested for passport photos and print-ready artwork.
For JPG and PNG files only the resolution field in the file header is rewritten, so the pixels and quality are untouched. If a form also specifies a physical size, enter it in centimetres and the image is resized to match at 300 DPI. Everything happens in your browser: the file never leaves your phone or computer, is not uploaded to any server and is not stored by News Appite.
You can convert many images at once, and each is saved with the same name so it is easy to keep track of which file is which.
How to use the 300 DPI Converter
- Choose one or more JPG or PNG images.
- Keep 300 DPI selected (you can pick another value if needed).
- Optionally enter the required print size in centimetres.
- Press "Change DPI" and download.
Tips & benchmarks
- At 300 DPI, a 1 inch (2.54 cm) print needs 300 pixels; for example 3.5 cm needs about 413 pixels.
- DPI alone does not add sharpness; start from the highest-resolution original you have.
- Check the DPI in Windows via right-click → Properties → Details.
- After converting, verify the value in the image properties; it should read 300 dpi horizontally and vertically.
Frequently asked questions
How do I convert an image to 300 DPI?
Add the image, keep 300 DPI selected and press Change DPI. The downloaded file reports 300 DPI in its properties.
Does it reduce quality?
No. For JPG and PNG only the header value changes; the image itself is not re-compressed.
How many pixels is a 300 DPI passport photo?
A 35 × 45 mm photo at 300 DPI is about 413 × 531 pixels.
Is my image uploaded?
No. The change is made in your browser.
What is DPI?
DPI (dots per inch) is the number of image pixels printed in each inch of paper. It controls physical print size, not the number of pixels.
Is 300 DPI the same as 300 PPI?
For digital images the two terms are used interchangeably; the value stored in the file is technically pixels per inch.
Can I convert HEIC or WebP images?
Yes. They are converted to JPG and saved at 300 DPI.
Can I convert an image to 300 DPI without changing its size?
Yes, you can convert an image to 300 DPI without changing its size by using this tool and not entering a physical size in centimetres. The tool will only rewrite the resolution field in the file header, leaving the pixels and quality untouched.
Can I convert PDF or TIFF images to 300 DPI using this tool?
No, this tool only supports converting JPG and PNG files to 300 DPI. It does not support PDF or TIFF files.
What happens if I enter a physical size in centimetres when converting an image to 300 DPI?
If you enter a physical size in centimetres, the image will be resized to match that size at 300 DPI. This allows you to ensure your image is the correct size and resolution for printing.
Can I convert multiple images to 300 DPI at the same time?
Yes, you can convert many images at once using this tool, and each image will be saved with the same name to make it easy to keep track of which file is which.
Related searches
All tools on News Appite are free to use for personal and commercial work. Calculations and file conversions are performed in your browser; the redirect and cache checkers make a single request to the URL you enter and store nothing. Found a bug or want a new tool? Tell us.