Change Image DPI
Some exam forms ask for a photo or signature at 200 or 300 DPI. Upload your image, pick the DPI, and download a JPG with the correct print resolution written in — all in your browser, no upload.
Your documents never leave your device
All processing happens inside your browser using the Canvas API — there is no server upload, no cloud storage, and no data retention. We have zero access to your files. Nothing is stored for any duration, because nothing ever travels to our servers in the first place.
No server upload
Files stay in RAM, processed client-side
No account required
No email, no login, no tracking
No watermark
Output is clean — usable directly on exam portal
How it works
Upload image
JPG, PNG, WEBP or iPhone HEIC — click or drag your photo.
Pick DPI
Choose 200, 300, or type any custom DPI your form needs.
Check print size
The tool shows the print size in inches and cm at that DPI.
Download
Get a JPG with the DPI written into the file, ready to upload.
Frequently asked questions
How do I change a photo to 300 DPI?
Upload your photo, tap the 300 preset (or type a custom DPI), and download. The tool writes 300 DPI into the JPG file right in your browser.
Does changing DPI change the image size or quality?
No. DPI only sets the print resolution stored in the file. The pixels stay the same, so on-screen the image looks identical — only the print size changes.
What DPI do exam forms need?
It varies by exam. Many government forms ask for 200 DPI or 300 DPI for the photo and signature. Always check your exam notification for the exact value.
Is my image uploaded to a server?
No. The DPI is set in your browser using the Canvas API. Your image never leaves your device.
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