Universal Image File Size Checker & Bandwidth Budget Inspector Studio by RiazHub is a high-speed, privacy-first web utility engineered for frontend developers, SEO specialists, performance architects, and digital content creators.

Inspect exact integer byte weights, metric decimal units ($1\text{ KB} = 1,000\text{ B}$, $1\text{ MB} = 1,000,000\text{ B}$), and binary IEC standards ($1\text{ KiB} = 1,024\text{ B}$, $1\text{ MiB} = 1,048,576\text{ B}$) side-by-side with zero ambiguity. The studio calculates Bits-Per-Pixel (bpp) density ratios to expose bloated thumbnails and inefficiently quantized assets, evaluates compliance against Google Core Web Vitals Largest Contentful Paint (LCP) budgets (< 100 KB Fast Mobile, < 200 KB E-Commerce, < 500 KB Desktop Hero), models packet download latencies across real-world carrier profiles (Slow 3G, Fast 3G, 4G LTE, and 5G Fiber), and forecasts predicted payload reductions across next-gen codecs (AVIF up to -55%, WebP up to -35%, and MozJPEG).

Ingest single images or batch queues of up to 250+ files simultaneously with drag-and-drop, clipboard paste (Ctrl+V), interactive Pareto 80/20 weight share visualizers, 1-click clipboard copy, and complete audit export to CSV or JSON. All operations run 100% locally in your web browser with zero server uploads guaranteeing complete confidentiality and instantaneous sub-millisecond execution.

RiazHub Core Web Vitals Studio

Universal Image File Size Checker & Performance Studio

Inspect exact byte-level weights, compute bits-per-pixel density, simulate network transfer times across mobile networks, and audit Largest Contentful Paint (LCP) budgets entirely inside your browser.

Primary File Weight

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Select or drop an image

Web Vitals Grade

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Target: < 100 KB Fast Mobile

4G Network Latency

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Simulated at 15 Mbps LTE

Next-Gen AVIF Savings

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Predicted WebP: —

⚡ 1-Click Presets:

📥

Drop Images Here or Click to Browse

JPG, PNG, WEBP, AVIF, SVG, BMP, TIFF, GIF (Up to 250+ Images)

Display Unit Standard IEC / Metric

Target Performance Budget

Fast Mobile Target

< 100 KB

E-Commerce Product

< 200 KB

Desktop Hero Banner

< 500 KB

Custom Threshold

Custom KB

Batch Queue (0) 0 KB Total

No images loaded yet. Drag & drop files or click "Select Files" above.

— GRADE

No Image Selected Awaiting Input

Load an image to inspect byte weights, resolution density, and Largest Contentful Paint compliance.

Resolution & Pixels

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0.00 Megapixels

Bits-Per-Pixel (bpp)

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Efficiency Density Ratio

Exact Byte Weight

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0 KiB Binary (IEC 1024)

💡 Web Performance & Optimization Diagnostics

Select or drop any image file to generate personalized optimization recommendations.

Estimated client download duration over standard real-world carrier profiles (excluding server TTFB):

SLOW 3G Emerging Mobile / Rural (400 Kbps)

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FAST 3G Standard Mobile Handshake (1.6 Mbps)

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4G LTE Modern Cellular Network (15 Mbps)

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5G / FIBER High-Speed Broadband (100 Mbps)

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Simulate real-world download animation:

Predicted byte payload savings upon re-encoding into modern high-efficiency image formats:

NEXT-GEN AVIF

AV1 Image File

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-55% Estimated

Superior chroma compression, ideal for high-res web heroes.

UNIVERSAL WEBP

Google WebP

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-35% Estimated

Supported in 97%+ of modern global web browsers.

LEGACY MOZJPEG

Trellis Quantization

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-20% Estimated

Optimized progressive Huffman tables for fallback backward compatibility.

📈 Monthly Traffic & Bandwidth Savings Simulator 50,000 Monthly Pageviews

10K 1M

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Original Monthly Transfer

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With AVIF/WebP Compression

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Net Bandwidth Saved / Month

0 total images

#	Filename	Format	Dimensions	Size	Exact Bytes	bpp	Grade	Action
No batch items loaded. Add files via the upload panel.

Visual proportional weight share of all loaded images across the current payload batch:

No batch data available

⚖️ Pareto 80/20 Web Performance Insight

Load two or more images to identify payload outliers and prioritize compression efforts for maximum Core Web Vitals impact.

Image File Weight, Bits-Per-Pixel & PageSpeed Performance Guide

What is the difference between Metric (KB/MB) and Binary IEC (KiB/MiB)? ▼

Metric units adhere to the International System of Units (SI) where 1 Kilobyte (KB) = 1,000 Bytes and 1 Megabyte (MB) = 1,000,000 Bytes (decimal base 10). Operating systems like macOS and networking standards typically report sizes in decimal metric units. In contrast, the International Electrotechnical Commission (IEC) standard defines binary units based on powers of 2, where 1 Kibibyte (KiB) = 1,024 Bytes and 1 Mebibyte (MiB) = 1,048,576 Bytes. Traditional Windows file explorers frequently display binary KiB/MiB values labeled as "KB/MB". This tool provides both standards side-by-side with exact integer byte counts so you can audit assets with precision.

What does Bits-Per-Pixel (bpp) mean and why is it crucial for optimization? ▼

Bits-Per-Pixel (bpp) measures compression efficiency relative to visual resolution. It is calculated as (File Size in Bits) / (Width × Height). A 500 KB image measuring 3840×2160 (4K resolution) has a bpp of only ~0.48 bpp (exceptionally efficient compression). Conversely, a 500 KB image measuring only 400×300 has a bpp of ~33.3 bpp (heavily uncompressed or bloated raw data). Evaluating bpp reveals bloated thumbnails and uncompressed small graphics masquerading as "acceptable" file sizes.

How do image file weights directly impact Google Core Web Vitals & LCP? ▼

Largest Contentful Paint (LCP) measures how quickly the main content of a webpage becomes visible. In over 70% of modern web audits, the LCP element is a hero image, product banner, or background photo. If this image exceeds 200–500 KB, mobile browsers on 3G or constrained 4G connections must spend hundreds of milliseconds downloading the binary payload before rendering can initiate. Keeping above-the-fold hero images under 100 KB ensures fast LCP scores under Google's recommended 2.5-second threshold, reducing user bounce rates and improving organic search visibility.

Is my uploaded photo data private and secure? ▼

Yes, 100%. This tool operates entirely inside your local web browser using client-side JavaScript APIs (File, FileReader, and HTML5 Image()). Zero bytes, photos, sensitive personal documents, or private metadata are ever sent to any remote server or third-party cloud. Your image processing is instant, private, and works completely offline.

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