Convert WebP to Lossy WebP

Convert WebP to Lossy WebP | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Media
Input types: file, range, number, checkbox
Output type: file
Sample coverage: 4
API ready: Yes

Overview

Optimize your WebP images by converting them to lossy WebP format, allowing you to significantly reduce file sizes while maintaining visual quality through precise control over compression settings.

When to use

When you need to reduce the file size of high-resolution WebP images for faster web page loading.
When you want to optimize images for mobile devices without sacrificing significant visual fidelity.
When you need to fine-tune compression parameters like effort and method to balance image quality and processing speed.

How it works

1Upload your source WebP image file to the tool.
2Adjust the quality, compression effort, and method sliders to define your target balance between file size and visual output.
3Enable optional features like smart subsampling or alpha channel quality adjustments if your image contains transparency.
4Process the file and download your optimized lossy WebP image.

Use cases

Optimizing hero images and banners for e-commerce websites to improve Core Web Vitals.
Compressing large batches of user-uploaded profile pictures to save server storage and bandwidth.
Preparing image assets for high-traffic blogs where page load speed is critical for SEO.

Examples

1. Optimizing Website Hero Images

Web Developer

Background

A high-resolution hero image in WebP format is causing slow page load times on a landing page.

Problem

The file size is too large for optimal performance, but the visual quality must remain high.

How to use

Upload the image, set the quality to 75, and increase the compression effort to 6 for maximum efficiency.

quality: 75, effort: 6, method: 4

Outcome

The image file size is reduced by 40% with no noticeable loss in visual quality, improving page load speed.

2. Compressing Transparent UI Icons

UI Designer

Background

A set of complex WebP icons with transparency is consuming too much bandwidth.

Problem

Standard compression often ruins the edges of transparent icons.

How to use

Upload the icon, set the quality to 85, and set the Alpha Quality to 90 to preserve the transparency edges.

FAQ

What is the difference between lossless and lossy WebP?

Lossless WebP preserves every pixel of the original image, while lossy WebP uses predictive coding to reduce file size by discarding imperceptible data.

How does the quality slider affect the file?

Lowering the quality value (0-100) increases compression, resulting in smaller file sizes but potentially introducing visual artifacts.

What do the compression effort and method settings do?

Higher values for effort and method increase the time spent searching for the best compression strategy, resulting in smaller files at the cost of longer processing time.

Can I convert images with transparency?

Yes, you can use the Alpha Quality setting to control the compression level of the transparency channel independently.

What is Smart Subsampling?

Smart Subsampling optimizes the chroma channels of the image, which can improve visual quality in specific areas when using lossy compression.

quality: 85, alphaQuality: 90, smartSubsample: true

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Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Optimizing Website Hero Images

2. Compressing Transparent UI Icons

FAQ

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