speedPerformance Tool

Web Image Performance Auditor

Upload any image and get a detailed performance report. Scores file size efficiency, recommends optimal formats, and estimates potential savings — all processed locally.

Grades

A through F

Checks

Size, Format, Resolution

Output

WebP Optimized

Processing

100% Local

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Upload an image to audit

Drag and drop or click to select (JPEG, PNG, WebP, GIF, SVG)

Select File

transform

Image Converter

Convert between popular image formats.

compress

Exact KB Compressor

Compress images to an exact target file size.

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Image Size Reducer

Reduce image dimensions and size quickly.

DPI Checker

Check and change image DPI for printing.

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Key details

Supported Formats

JPEG, PNG, WebP, GIF, SVG

Audit Metrics

Size, Resolution, Format, EXIF

Output Format

Optimized WebP

Privacy

No server uploads

Max File Size

Limited only by browser memory

How it works

Upload Image

Select any standard web image format to begin the audit.

View Audit Report

Instantly see your image grade and detailed file properties.

Check Recommendations

Review insights on resolution limits and metadata stripping.

Download Optimized

Grab the optimized WebP version of your image instantly.

Frequently asked questions

How is the performance grade calculated?

The grade (A to F) is calculated by comparing your actual file size to an "ideal" size benchmark based on your image dimensions and type. Files well under the benchmark score an A, while significantly larger files score lower.

Are my images uploaded to a server?

No. All processing and analysis is done securely in your browser using the HTML5 Canvas API. Your images never leave your device.

Why does it recommend WebP?

WebP provides superior lossless and lossy compression for images on the web, significantly reducing file sizes without sacrificing quality compared to standard JPEG or PNG.

What does "Hidden Metadata" mean?

Photos taken with cameras and phones often include EXIF data (GPS coordinates, camera model, etc.) and color profiles. While useful, this data is unnecessary for web display and needlessly increases file size.

How can I fix a bad score?

Use the "Download Optimized WebP" button provided in the tool, which automatically converts and compresses the image. Additionally, ensure your image dimensions aren't larger than necessary for your website.

Does the grade measure Core Web Vitals?

No. This is an image-level diagnostic, not a replacement for Lighthouse, PageSpeed Insights, or real-user Core Web Vitals data. Use those tools to evaluate the complete page.

Should I optimize every image to the smallest size?

No. Balance file size and visual quality for the image’s role. A hero image may need more detail than a thumbnail, and responsive variants can prevent oversized downloads on small screens.

Bharat Kumar G.verified

Technical SEO & Document Processing Expert

Bharat is the founder of ReadyToSubmit. With years of experience in technical web development, he builds privacy-first, client-side tools to help Indian government exam aspirants format their applications accurately and securely without server uploads.

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