Which file types does Image DPI Changer accept?

The drop area takes JPG, JPEG, PNG and 2 more. Files are read from your device in the browser, so the format has to be one a browser can decode — that is why the accepted list on this page is finite and honest rather than "everything".

What do I get back from Image DPI Changer?

The result is JPG, PNG, offered as a download the moment the work finishes. Multiple results come back together rather than as fifty separate save dialogs.

How big a file can I use?

Up to 100 MB per file and 50 files per batch. There is no server queue behind that limit; the practical ceiling is your browser's memory, so split unusually large documents into two runs.

Where does the processing actually happen?

In this tab. The file is read locally, converted or edited locally, and handed back as a download — no copy is sent to a server, so there is nothing for anyone to breach or keep.

Image DPI Changer

Set print DPI metadata for JPG/PNG.

Drop JPG or PNG files

Print DPI is written into the file header — the pixel data is never resampled

Changing DPI does not add detail — it only tells a printer or layout app how large to place the existing pixels. To make an image genuinely sharper you must resample it (Image Resizer / Upscaler) first.

Add JPG or PNG files first.

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About Image DPI Changer

Image DPI Changer is here for writing the print resolution into an image's metadata: set print DPI metadata for JPG/PNG. It takes JPG, JPEG, PNG and 2 more and produces JPG, PNG. Nothing is sent anywhere: the browser reads the file, does the work and hands the result back.

Useful when the job is writing the print resolution into an image's metadata and you would rather not install software, join a queue or hand the file to a stranger.

How to use Image DPI Changer in 3 steps

Drop the picture on the page — JPG, JPEG, PNG and 2 more works here, up to 100 MB.
Set the DPI value to write into the file's print metadata.
Press Set DPI and download the result in whichever of JPG, PNG suits you.

What you get with Image DPI Changer

Accepts JPG, JPEG, PNG and 2 more in one go
Output in JPG, PNG
Runs in your browser — the file is never uploaded
Free to use, with no signup and no account
No watermark or logo added to your output
Works on desktop and mobile, no install

Image DPI Changer: questions

Which file types does Image DPI Changer accept?: The drop area takes JPG, JPEG, PNG and 2 more. Files are read from your device in the browser, so the format has to be one a browser can decode — that is why the accepted list on this page is finite and honest rather than "everything".
What do I get back from Image DPI Changer?: The result is JPG, PNG, offered as a download the moment the work finishes. Multiple results come back together rather than as fifty separate save dialogs.
How big a file can I use?: Up to 100 MB per file and 50 files per batch. There is no server queue behind that limit; the practical ceiling is your browser's memory, so split unusually large documents into two runs.
Where does the processing actually happen?: In this tab. The file is read locally, converted or edited locally, and handed back as a download — no copy is sent to a server, so there is nothing for anyone to breach or keep.