100% Client-Side • Zero Cloud Uploads

PNG to JPG Converter

Convert PNG images to JPG with custom background color for transparency.

Drop your image here

Drag & drop single photo for Studio Mode, or multiple photos for 1-Click Batch Processing

Choose File
JPG, PNG, WebP, GIF, BMPPaste supported (Ctrl+V / ⌘V)Max: 50 MB

Your images stay on your device

Processing happens 100% locally in your browser. Files are never uploaded to any cloud server.

Step-by-Step Guide

How to use this tool

1

Select PNG File

Upload the PNG image you want to convert.

2

Choose Background & Quality

Pick a background color for transparent pixels (white, black, custom) and set JPG quality.

3

Download JPG

Export your lightweight JPG image.

Key Capabilities

Why use Image Toolkit?

Transparency Handling

Seamlessly fills transparent alpha layers with your chosen background color.

Quality Control

Fine-tune output size versus compression balance.

Technical Specifications

How PNG to JPG Converter Works in Your Browser

Unlike conventional online conversion websites that upload your files to remote cloud servers, Lumino processes your media 100% client-side inside your browser sandbox using modern WebAssembly (WASM), WebGPU, and the HTML5 Canvas 2D API.

This means your sensitive photos, identity cards, passport scans, and proprietary design files are processed directly on your local device hardware (RAM/GPU) and are never transmitted across the internet.

Supported InputsJPG, PNG, WebP, SVG, BMP, TIFF, GIF, HEIC
Processing EngineWASM SIMD + Canvas 2D + WebGPU
Privacy & StorageZero Cloud Uploads • Memory-Only
Frequently Asked Questions

Everything You Need to Know

Clear answers on privacy, security, file limits, and image quality.

Since JPG doesn't support transparency, any transparent areas are smoothly filled with your selected background color (default is clean white).

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