Device Pixel Ratio
Inspect devicePixelRatio and approximate physical screen pixels for your display.
Processing: runs in your browser, nothing uploaded
About Device Pixel Ratio
Diagnostics should run locally without installing extra utilities. Device Pixel Ratio is built for that job: inspect devicePixelRatio and approximate physical screen pixels for your display.
What Device Pixel Ratio checks
Inspect devicePixelRatio and approximate physical screen pixels for your display. Results describe this browser and device only — useful for isolating mute switches, permissions, and display quirks.
If the test fails
Check OS settings, tab mute, extensions, and whether another app has exclusive device access. Retry after a click if the browser blocked autoplay or permission prompts.
Where your data goes
Device Pixel Ratio runs in your browser for this job. Your display is not uploaded to FileToolsHub servers for the conversion itself, which matters when you are dealing with private notes, drafts, or local files.
How to use
- 1
Open the page.
- 2
Read DPR and screen sizes.
- 3
Resize the window to refresh.
Privacy
Runs entirely in your browser — your display is not uploaded.
Frequently asked questions
Why not integer?
Browser zoom and OS scaling can produce fractional DPR values.
Is Device Pixel Ratio free?
Yes. Device Pixel Ratio is free for everyday use with no account required, and it runs in your browser.
Does Device Pixel Ratio upload my data?
No. Device Pixel Ratio processes your display locally in this tab.
Can I use Device Pixel Ratio on mobile?
Yes — use a modern mobile browser. Large files may be slower on limited connections.
Why not integer?
Browser zoom and OS scaling can produce fractional DPR values.
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