Home / Online Tools / Local Storage Tester

Browser Tools

Local Storage Tester

Verify Local Storage works in this browser.

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…
Explore more FreeConverter.app tools Continue with related FreeConverter.app browser tools — private, free, no registration.
Browse all tools

FreeConverter.app Guide

What does Local Storage Tester do?

Test localStorage availability, write/read/remove a probe key, list approximate usage and clear the probe safely.

When should I use it?

Use Local Storage Tester 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.

→
2
⚙

Run the check

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

→
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 Local Storage Tester

Test localStorage availability, write/read/remove a probe key, list approximate usage and clear the probe safely. 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. Local Storage Tester on FreeConverter.app is free to use without creating an account.

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

Related Tools

More from Browser Tools

Browser Capability Center Audit your browser locally: OS, dark mode, storage, IndexedDB, clipboard, WebP/AVIF, canvas, WebGL/WebGPU, WebRTC, notifications, battery, language, timezone, screen and viewport. Export TXT or JSON. Browser Information Viewer See browser name, version, OS, platform, languages, concurrency, touch points and dark-mode preference — all from navigator APIs in your browser. Screen Resolution Checker Check screen width, height, available size, color depth and orientation using the Screen API — entirely in your browser. Viewport Size Checker Measure viewport width/height, outer window size and scroll position. Updates live as you resize — no upload. User Agent Viewer View and parse your full user agent string with browser and OS hints. Copy or export locally. Device Pixel Ratio Checker See devicePixelRatio, CSS pixels vs device pixels, and Retina/HiDPI hints from your display. Browser Language Viewer Inspect navigator.language, preferred languages list and locale/timezone pairing from Intl APIs. Cookie Enabled Checker Check navigator.cookieEnabled and verify write/read of a test cookie in this browser (then remove it).
View all Browser Tools →