JPEG to PNG Online Converter

JPEG ファイルを PNG 形式に3ステップで簡単変換。

PNG⌄

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⚙ オプション設定

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DPI

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Crop (px)

Convert JPEG to PNG Format

JPG to PNG conversion is essential when you need lossless quality or transparent backgrounds. JPG's lossy compression is great for photos, but it introduces artifacts around sharp edges — logos, text, and icons look blurry. PNG preserves every pixel exactly and supports full alpha transparency, making it the industry standard for web graphics, UI assets, and print-ready artwork. Once converted, you can re-edit and export the file repeatedly without any quality degradation.

Why Convert JPEG to PNG?

🖼️

Transparent backgrounds

PNG supports full alpha transparency. Remove backgrounds cleanly after converting from JPG.

✍️

Text and logos

Crisp edges on text and solid shapes stay artifact-free in PNG, unlike the blurry halos in JPG.

🔄

Non-destructive editing

PNG never loses quality on re-save. Edit and export repeatedly without generational loss.

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Web UI assets

Icons, buttons, and interface elements look pixel-perfect as PNG on any high-DPI display.

JPEG

File extension.jpeg
DescriptionJPEG is the most widely used lossy image compression format, ideal for photographs and complex images with many colors.
Associated programsAdobe Photoshop, GIMP, Windows Photo Viewer, Preview (Mac)
Developed byJoint Photographic Experts Group
MIME typeimage/jpeg

PNG

File extension.png
DescriptionPNG (Portable Network Graphics) is a lossless raster image format that supports transparency. Ideal for graphics, logos, icons, and images that require a transparent background.
Associated programsAdobe Photoshop, GIMP, Microsoft Paint, Preview (Mac)
Developed byPNG Development Group
MIME typeimage/png

JPEG を PNG に変換する方法は？

JPEG ファイルを PNG 形式に3ステップで簡単変換。

Step 01

JPEG ファイルをアップロード

「ファイルを選択」をクリックするか、JPEG 画像をドラッグ＆ドロップ。

Step 02

アウトプット形式として PNG を選択

ドロップダウンから "PNG" を選択。

Step 03

ファイルを変換

「今すぐ変換」をクリックして JPEG から PNG への変換を開始。

Step 04

PNG ファイルをダウンロード

変換が完了したら、変換された PNG ファイルをダウンロード。

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Tip: Converting JPG → PNG does NOT recover quality lost during original JPG compression. PNG preserves whatever quality the JPG has — without further loss.