Convertisseur JPG vers PNG sans perte, local, gratuit.

Déposez vos fichiers JPG et obtenez des PNG éditables avec transparence. La conversion se fait dans votre navigateur.

Pourquoi convertir JPG en PNG

Drop JPG files

Drag your .jpg or .jpeg files into the drop zone, or click to browse.

Browser re-encodes to PNG

The image is decoded and re-encoded as lossless PNG using the canvas API, locally.

Download the PNG

Click Download on each file. Use Get URL if you want a hosted link instead.

Pourquoi convertir JPG en PNG

Before editing

Every JPG save loses quality. Convert once to PNG, edit as many times as you want.

Transparent backgrounds

You can't add transparency to a JPG — but you can to its PNG. Convert first, then erase the background.

Logos, UI, screenshots

JPG blurs sharp edges with its DCT blocks. Re-save as PNG if the JPG is an accidentally-compressed logo or UI screenshot.

Platforms that require PNG

Some print pipelines, icon sets, and academic journals accept only PNG/TIFF. Convert once, submit.

Questions fréquentes

Does converting JPG to PNG improve quality?

No. JPG's compression artifacts are already baked in — PNG just preserves them losslessly. If you need higher visual quality, you need the original source.

Why is the PNG bigger than the JPG?

PNG is lossless — it encodes every pixel exactly. JPG throws away high-frequency detail. Expect PNGs to be 3–10× larger than the source JPG.

Are my JPGs uploaded anywhere?

No. The conversion runs in your browser via the canvas API. Nothing leaves your device unless you click Get URL.

Can I add transparency after converting?

Yes — after download. JPG has no alpha channel, so the output is fully opaque PNG. Open in Photoshop/GIMP/Photopea to erase a background.

Does it preserve EXIF metadata?

No. Canvas re-encoding strips EXIF, GPS, and embedded ICC profiles.

Any file-size limit?

No server limit. Your browser's memory is the only cap — large phone photos convert fine.

Why would I want PNG instead of JPG?

Editing (re-saves without further loss), transparency (you plan to erase a background), and sharp-edge graphics (screenshots, UI, logos).

What browsers are supported?

Chrome, Edge, Firefox, Safari, Brave, and Arc — desktop and mobile.

Besoin d'un lien permanent vers le PNG ?

Après conversion, cliquez sur Get URL.

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