100% Private (Local Processing)
Change Image DPI Online
Modify the DPI (Dots Per Inch) markers in JPEG/PNG headers losslessly without pixel changes.
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How to use Image DPI Converter
- 1
Upload your JPEG or PNG image.
- 2
Select your target print DPI resolution (e.g. 300 DPI for high-quality printing).
- 3
Click 'Modify Image DPI' to overwrite metadata density flags.
- 4
Download your print-ready image.
Capabilities
- Modifies DPI metadata tags client-side in seconds
- Overwrites JFIF APP0 segments in JPEGs and pHYs chunks in PNGs
- Zero pixels re-compression ensuring 100% loss-free saves
- Ideal for compiling passport photos or visa submissions
Privacy & Processing
This tool operates in a sandbox directly inside your web browser. All parsing, processing, and downloads are rendered locally. Your file size, metadata, and contents never cross the network. It works completely offline.
Frequently Asked Questions
Does changing the DPI change the size or dimensions of my image?
No. It does not alter the pixel width or height. It only updates the metadata density flag, telling printers how many pixels to fit per inch of paper.