Zerosuniverse
Tech

Live Browser Storage Quota, Cache API & IndexedDB Inspector (2026)

Query real-time navigator.storage.estimate() quotas, enumerate IndexedDB databases, inspect LocalStorage/SessionStorage byte footprints, and simulate PWA offline cache eviction policies.Documentation & FAQs ↓

Live Browser Storage Quota, Cache API & IndexedDB Inspector — Interactive Console
Runs locally in your browser • Instant output
Live Origin Storage & Cache Telemetry
Live origin telemetry loaded.
Origin Quota
N/A
Used: 0.00 MB
localStorage (5 MB Cap)
0.00 KB (0.0%)
0 keys
sessionStorage
0.00 KB
UTF-16 DOMString
document.cookie Jar
0 Bytes
4,096 B Header Limit
Origin localStorage Key Breakdown
No keys currently stored in window.localStorage. Click + Inject 192 KB Test Bloat above to test live UTF-16 byte accounting.
Ready
Embed / Cite This Tool (Markdown & HTML)
GitHub / Reddit Markdown Badge[![Live Browser Storage Quota, Cache API & IndexedDB Inspector](https://img.shields.io/badge/ZerosUniverse-Free_Tool-ff6a00)](https://www.zerosuniverse.com/tools/browser-storage-cache-bloat-inspector/)
Blog / Documentation HTML Citation<a href="https://www.zerosuniverse.com/tools/browser-storage-cache-bloat-inspector/">Live Browser Storage Quota, Cache API & IndexedDB Inspector — ZerosUniverse</a>

2026 Quick-Reference Cheat Sheet & Benchmark Table: Live Browser Storage Quota, Cache API & IndexedDB Inspector

Quick Answer & 2026 Technical Summary (browser storage quota cache inspector)Updated 2026 Standard

Modern websites use Service Workers, the Cache API, and IndexedDB to store offline assets, video segments, WebAssembly bundles, and telemetry queues. Because Chromium allows a single origin to use up to 60% of total disk space, visiting media-heavy sites can silently accumulate several gigabytes of cached blobs. Use this interactive browser storage quota cache inspector above to test navigator storage estimate online test, indexeddb localstorage byte size analyzer, and pwa cache api bloat calculator locally in your browser with zero server uploads.

Target Keyword Spec: browser storage quota cache inspector | Modules: Live Navigator Storage Manager & Quota Telemetry • LocalStorage & SessionStorage UTF-16 Byte Profiler • IndexedDB & Service Worker Cache API Enumerator
Primary Focus: browser storage quota cache inspector
Core Capability: navigator storage estimate online test
Privacy Mode: 100% Client-Side (Zero Upload)
Technical Parameter / ModuleStandard / Keyword SpecArchitecture & Validation RuleOperational Use Case (2026)
Live Navigator Storage Manager & Quota Telemetrynavigator storage estimate online testExecute navigator.storage.estimate() and persisted() checks in real time to...Diagnosing Mobile Browser 'Site Data' Storage Bloat
LocalStorage & SessionStorage UTF-16 Byte Profilerindexeddb localstorage byte size analyzerScan every key-value pair in LocalStorage and SessionStorage, computing exa...PWA Offline Storage & Quota Exceeded Debugging
IndexedDB & Service Worker Cache API Enumeratorpwa cache api bloat calculatorList active IndexedDB object stores and CacheStorage buckets, and model how...Privacy Auditing of Persistent Client-Side Trackers
Hardware & Protocol Spec Version2026 IEEE / JEDEC / VESA / PCI-SIGHigh-Precision Browser API TelemetryCross-checked against hardware datasheets
Real-Time Measurement LooprequestAnimationFrame / WebAudio / WebGLSub-Millisecond HighResTimeStamp (DOMHighRes)Runs natively on desktop, laptop & mobile browsers
Safety Headroom & Efficiency Factor80 PLUS / PFC 0.8–0.9 / 25% Surge MarginContinuous Load ≤ 75% Rated Peak CapacityPrevents thermal throttling & voltage droop
Advertisement

Step-by-Step Workflow

4 Easy Steps
01Phase 1

Run Live Browser Storage Telemetry Scan

Click Refresh Live Telemetry to query navigator.storage.estimate(), IndexedDB databases, CacheStorage keys, and LocalStorage/SessionStorage entries in your browser.

02Phase 2

Inspect Key-by-Key UTF-16 Memory Allocation

Examine the sorted storage breakdown table to see which keys consume the highest percentage of the 5 MB LocalStorage cap.

03Phase 3

Simulate Origin Quota & Mobile Disk Pressure

Use the Chromium/Safari/Firefox Quota Simulator sliders to calculate maximum per-origin storage limits and LRU eviction trigger points for any device disk size.

04Phase 4

Purge Test Caches or Export Storage Audit JSON

Safely clear sandbox test keys, test persistent storage permissions, or export a complete JSON snapshot of your browser's storage configuration.

Real-World Applications

Diagnosing Mobile Browser 'Site Data' Storage Bloat

Understand why Chrome, Brave, or Safari on Android/iOS consumes 5 GB–20 GB of internal storage via unpruned Service Worker caches and IndexedDB blobs.

PWA Offline Storage & Quota Exceeded Debugging

Test QuotaExceededError boundaries across Chromium (up to 60% of disk), Firefox (up to 10 GB per group), and WebKit Safari before deploying offline-first web apps.

Privacy Auditing of Persistent Client-Side Trackers

Inspect persistent LocalStorage supercookies, analytics state objects, and cached identifiers stored inside your active browser context.

Related Editorial Guide9 Tricks to Free Up Space on Your Android Phone in 2026
Read Tutorial →
Help Your Network

Found this tool helpful? Share it with colleagues:

100% free, private browser utility with zero server uploads. Spread the word!