📂
TOOL

File Size Analyzer

Free browser-based file size analyzer to scan files fast, compare size totals, and spot oversized uploads before sharing or storage limits cause issues.

✓Runs in your browser
✓Local-first browser native processing
✓No installation or server uploads required

Selecting a file allows the browser to read it locally. Files are processed locally in your browser when using supported tools. No upload required for supported workflows.

Drag & drop files to begin

Select or drag multiple files from your device. Entirely processed locally in your browser memory.

Private Data Inspection

Secure, on-device analysis without server dependency.

SHRTX identifies oversized assets using a specialized processing engine that operates entirely within your browser. By leveraging modern web APIs, the tool performs deep payload analysis and compatibility checks on your local machine. This architecture ensures that your data remains private and never leaves your device. Processing speed is limited only by your hardware, providing a fast, secure alternative to traditional cloud-based checkers.

Live Browser Runtime
Zero Upload
Local Browser Session
Processing Pipeline
SDK Engine V2.4.0
Active ProcessID: SELECT

Select Assets

The explorer initializes a secure entry point for your data. It sets up an isolated listener for the browser's File API to begin processing.

Browser Instruction

Initializing window.FileReader and drag-and-drop event listeners.

Privacy Guarantee

Data is indexed into transient memory only. No network requests are triggered.

Secure memory isolation active.
Browser API
Runtime Event Log
Worker: Active
Heap: 2.4MB
SYSTEM#SHRTX Browser Runtime v2.4 initialized.

Visual Analysis Workflow

Understand how SHRTX processes your data locally using the browser runtime.

1

Select Files

Drag assets into the workspace to start the session.

2

Header Inspection

The runtime reads file metadata instantly without any uploads.

3

Volume Analysis

Automated calculation of total payload and largest contributors.

4

Network Mapping

Real-time bandwidth estimation for different connection speeds.

5

Platform Validation

Compliance check against limits for Gmail, Discord, and Slack.

6

Insights Dashboard

Detailed visualization of individual and aggregated metrics.

7

Optional Export

Generate a structured CSV report for documentation or sharing.

Core Analysis Capabilities

Advanced metadata inspection and platform verification engine.

Combined Payload

Calculates the total sum of all assets for accurate transfer planning.

Category Breakdown

Groups data into format types like Images, Documents, and Videos.

Platform Verification

Validates sizes against limits for Gmail, Discord, and Slack.

Transfer Estimates

Predicts upload durations across Mobile 3G, LTE, and Fiber speeds.

Supported Extensions

Images & Photos

Inspects JPG, PNG, WebP, SVG, and AVIF. Computes overhead, dimensions, and metadata.

Documents & PDFs

Scans PDF, DOCX, TXT, and EPUB. Identifies sizes for portal compliance.

Data Spreadsheets

Analyzes CSV, XLSX, and MD datasets for bulk ingestion or analytics.

Audio & Video

Identifies MP4, WEBM, and MP3. Calculates transfer times for rich media.

Archives & Packages

Detects ZIP, RAR, and TAR files. Evaluates backup bundle payload sizes.

Basic Checks vs Payload Diagnostics

Discover why deep browser inspection provides more value than simple checks.

Property
Simple Size Check
Payload Diagnostics
Analysis Scope
Single file check
Bulk batch analysis
Focus Area
Byte length only
Platform limits and distribution
Classification
None
Automatic category mapping
Limit Validation
No platform limits
Validates Gmail, Discord, and Slack
Planning Assistance
Manual calculation
Transfer duration estimator
Actionable Outputs
Informational only
Exportable CSV reports

Practical Scenarios

Understand when to use payload analysis for optimal digital transfer.

Email Preparation

Validate files against Gmail's 25 MB limit before sending to prevent bouncing.

Chat Compression

Spot oversized media that exceeds Discord or WhatsApp Web requirements.

Content Publishing

Analyze CMS payloads to identify massive images that should be optimized.

Technical Audits

Inspect static assets or documentation packages for duplicate files.

Local-Only Analysis

This tool operates entirely within your web browser. No files are uploaded to our servers. All scanning, statistics aggregation, and export operations happen locally, ensuring your data remains private and secure throughout the session.

Frequently Asked Questions

Q:How do I check file size online without uploading?

Select or drag files directly into the workspace. The SHRTX runtime reads local metadata using browser APIs to report sizes instantly without any data transmission.

Q:Can I compare multiple file sizes at once?

Yes. This tool supports high-performance batch analysis. You can add multiple files to compare their volume, rank them by size, and calculate their percentage share of the total payload.

Q:What file formats are supported?

This checker supports all standard file formats and extensions. The engine automatically categorizes assets into logical buckets like Images, Documents, and Media for streamlined inspection.

Q:Does this tool validate upload limits?

Yes. The tool includes a verification engine that compares your payload against limits for major platforms. This check ensures your attachments meet requirements for Gmail, Discord, and Slack.

Q:How are transfer times calculated?

The estimator uses bandwidth formulas to predict upload durations. It calculates how long your payload would take to transmit across various connection speeds, including Mobile LTE and Fiber.

Q:Can I export a report of my analysis?

Yes. You can generate a structured CSV report directly in your browser. The tool creates a downloadable spreadsheet containing filenames, exact byte counts, and individual payload percentages.

Q:Is this a disk cleanup tool?

No. This is a focused browser-native file size checker rather than a system scanner. It only analyzes the specific files you explicitly select or drag into the workspace.

Q:How can I reduce my upload size?

Use our local optimization tools if your payload exceeds platform limits. For images, we recommend the SHRTX Image to WebP Converter to reduce file size by up to 80% without quality loss.

Learning Resources

Master this tool with Product Guides

Learn the workflows, common mistakes, and advanced techniques behind File Size Analyzer with our deep-dive educational content.

Browse All Guides
Guide
Beginner

Analyze File Sizes

Analyze combined payloads, validate sizes against platform limits, and estimate transfer durations locally in the browser.

5 minutes read

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