JPG to PNG
Convert JPG images to PNG for free. Private, browser-based JPEG to PNG converter — lossless output, no uploads.
ファイルをアップロード
Drag and drop files here, or click to browse
Processed entirely in your browser. Your images never leave your device.
このツールについて
JPG to PNG converts your JPEG images into lossless PNG files in your browser. PNG is ideal when you need a lossless format or plan to edit the image further.
All processing is local — your images are never sent to a server, and there is no sign-up or watermark.
使い方
Upload JPG Files
Drag and drop your JPG or JPEG images, or click to select them.
Convert
The tool converts each image to PNG automatically.
Download PNG
Download your lossless PNG images.
活用シーン
Lossless Editing
Convert to PNG before editing to avoid repeated JPEG compression loss.
Graphics & Logos
Use PNG for crisp graphics and screenshots.
Consistent Format
Standardize a mixed set of images to PNG.
よくある質問
Will converting to PNG improve quality?
It cannot recover detail already lost to JPEG compression, but it prevents further loss going forward.
Are files larger as PNG?
Often yes — PNG is lossless, so photo files are typically larger than JPG.
Is it private?
Yes. Everything runs in your browser.