Change Image DPI to 300
Change Image DPI to 300 works out to . Print size depends on DPI, not pixels alone: the same file is 300 DPI at this physical size and looks soft if you print it larger.
- DPI
- 300
or drop files here · paste with Ctrl+V
How to do it
- Drop your image into the box, or paste it from the clipboard.
- Check the options panel and set your options.
- Press Download. The file is generated on your device — nothing is uploaded.
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Frequently asked questions
Does the exported file carry 300 DPI?
Yes. Browsers normally drop resolution metadata when re-encoding, so this tool writes it back into the file itself (JPEG JFIF density, PNG pHYs). Print shops and application portals that read DPI will see 300.
Are my files uploaded anywhere?
No. Decoding, resizing and re-encoding all happen in your browser using a Web Worker. Your image never leaves your device, there is nothing to delete afterwards, and the tool keeps working if you go offline.
Is there a watermark or a limit?
No watermark and no per-file limit. Very large batches are processed one file at a time so your browser tab stays responsive.