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Viewport Size Checker

Live viewport and window measurements.

100% browser-side — probes, clipboard and network timing stay on this device. No server upload.
✓ Browser Processing ✓ No Upload ✓ Privacy First ✓ Free Forever ✓ Works Offline

Options

Results

Results will appear here…
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FreeConverter.app Guide

What does Viewport Size Checker do?

Measure viewport width/height, outer window size and scroll position. Updates live as you resize — no upload.

When should I use it?

Use Viewport Size Checker when you need a private, upload-free browser tool for this task.

Who is it for?

Developers, marketers, students, and anyone who needs a free browser utility.

Example input

Paste text, markup, or choose a local file (processed only in this browser tab).

Example output

Instant on-device result you can copy or download — nothing leaves your device.
Browser processing100% in-browser
PrivacyLocal Processing
UploadNot required
DifficultyEasy

How It Works

Real browser APIs — not generated guesses.

1
⎘

Open the tool

Everything runs in your browser using native Web APIs. Nothing is uploaded.

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2
⚙

Run the check

Inspect clipboard, device, network or capability data instantly on this device.

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3
⇩

Copy or export

Copy results, download TXT/JSON, or print a PDF from your browser.

Clipboard, storage and network timings never leave this device.

About Viewport Size Checker

Measure viewport width/height, outer window size and scroll position. Updates live as you resize — no upload. Part of FreeConverter’s Browser Tools for diagnostics, clipboard and network checks.

FAQs

No. Browser Tools run entirely in your browser. FreeConverter servers never receive clipboard contents, storage data, or probe results.

Developers, QA testers, support teams, and anyone debugging a browser environment.

Yes. FreeConverter.app browser tools are free to use.

No. FreeConverter.app processes this tool locally in your browser. Your input is not uploaded to our servers.

No. Viewport Size Checker on FreeConverter.app is free to use without creating an account.

Developers, marketers, students, and anyone who needs a free browser utility.

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