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Change DPI

Set a PNG or JPG image's DPI (72, 150, 300…) so it prints at the right physical size.

10 / 10 free files today

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ICO to PNGPull every image out of a Windows icon file and save them as PNGs.JPG to PNGConvert JPG/JPEG images to lossless PNG.PNG to ICOBuild a Windows .ico from an image, with every size you tick in one file.PNG to JPGConvert PNG images to compressed JPG with an adjustable quality.WebP ConverterConvert PNG or JPG images to modern WebP for smaller, faster-loading files.

Change DPI is free to use as often as you like, directly from this page. It covers 72, 150, 300 — adjust any of them and the result follows immediately.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What is Change DPI?

Set a PNG or JPG image's DPI (72, 150, 300…) so it prints at the right physical size.

What does it take into account?

It factors in 72, 150, 300. Change any of them and the output follows immediately.

When would I actually use this?

Meeting a requirement: a PNG where transparency matters, a JPEG where size does, a WebP for the web, or a specific DPI for print.

What is the most common mistake?

Converting a JPEG to PNG to improve it. PNG is lossless, so it preserves the compression damage already present and produces a much larger file for no gain — the loss happened at the first save.

What else is filed next to it?

ICO to PNG, JPG to PNG and PNG to ICO share its section. They are not variants of it — being filed together is not the same as being alike — but that is where to look if this turned out not to be the tool you wanted.

Where do the figures come from?

Conversion uses the browser's own encoders. Changing DPI rewrites a metadata field only — it does not resample the image, so the pixel data is untouched and the print size changes without any loss.

Further reading

All guides →
ExplainerDPI, PPI, and What Actually Controls Print SizeThe DPI figure inside an image file is a label. It changes no pixels. Printed size is pixels divided by PPI — and DPI, properly used, means something else entirely: the printer's dots.ComparisonJPEG, PNG, WebP or AVIF: Which Format, and WhyTwo properties decide the format — photographic or flat-toned, and whether it needs alpha or animation. Everything else is downstream. With measured byte counts for the same two images in all four formats.How-toConverting Between PNG and JPG Without Losing What MattersThe two directions fail in opposite ways. PNG to JPG silently flattens transparency onto a background colour the converter chooses — we got white from one tool and black from another on the same file. JPG to PNG recovers nothing and cost up to 11.4 times the bytes.GuideFavicons: What Sizes You Actually Need in 2026Five files cover every consumer that exists: the tab, the bookmark, the pinned tile, the Android home screen and the iOS home screen. The twenty-file lists are a dead browser matrix — with measurements showing what a 16-pixel icon can and cannot hold.ExplainerStripping Photo Metadata: What Actually Comes OffA JPEG can carry six separate metadata blocks, not one. We built a file holding all of them — coordinates, camera serial, a hidden thumbnail, XMP, IPTC, a comment — pushed it through the cleaner, and read the output byte by byte to see what survived.How-toHow to Compress an Image Without Losing QualitySmaller images load faster and rank better. Here's how to shrink an image the smart way — format, resolution and compression level — without visible loss.