Image DPI Converter
Image DPI Converter - a browser-based image tools utility.
Browser tool
About Image DPI Converter
DPI is a number stored in an image file saying how large it should print. Changing it is how you satisfy a printer asking for 300 DPI artwork. Whether that changes the pixels depends on which kind of change you make, and this is explicit about the difference. Changing the value is free, done online, and requires no sign up. The picture is rewritten on your own machine without uploading it, and no watermark is introduced along the way.
How to use it
- Open the image and read what it declaresMost files from a camera or a screenshot declare 72 or 96 DPI, a historical default that measures nothing about the image itself.
- Set the DPI you needChanging the metadata alone tells the printer to lay the same pixels out more densely, so the print gets smaller and sharper.
- Or resample to keep the physical sizeResampling invents new pixels to hold the same dimensions at higher density. The number goes up; the detail does not, and a good printer can tell.
What 300 DPI actually asks for
A printer asking for 300 DPI is asking for enough pixels: an image printed four inches wide needs 1200 of them. Setting the DPI field to 300 on an 800-pixel image does not create the missing 400 — it just relabels the file. The number in the metadata and the pixels present are independent, and only one of them carries detail.
What it does not do
- Raising DPI by resampling cannot recover detail that was never captured. It produces a larger, softer file, and a good printer will notice.
- Some formats do not store a DPI field at all, so there is nothing to change; the printer then assumes a default.
Questions people ask
- My printer says my image is too low resolution. Does changing DPI fix it?
- Only if the pixels are already there. Multiply the print size in inches by 300 to get the pixels you need; if the file has fewer, changing the DPI field relabels it without adding any, and the print will look the same.
- Does DPI affect how the image looks on a screen?
- No. Screens display pixels and ignore the DPI field entirely. It only matters when something is being printed or placed into a layout that works in physical units.
Questions about ToolsVerse itself — privacy, cost, what happens to your files — are answered in the frequently asked questions.
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