Convert JPG to PNG
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Images
Pour quoi faire?
Format et qualité
Plus bas : plus léger. Plus haut : plus fidèle.
Taille
L’image remplit tout le cadre, centrée ; le surplus est coupé (comme un recadrage automatique).
Une image n’est jamais agrandie (sauf en réseaux sociaux, où la taille est fixe). Les données cachées (lieu de la prise de vue, appareil) sont retirées.
Noms des fichiers
Exemplemarque-sujet-lieu-01.webp
Minuscules, sans accents ni espaces, avec des tirets : ce que lisent les moteurs de recherche.
Aucune image pour l’instant. Déposez-en n’importe où sur cette page, ou ouvrez « Images » à gauche pour les choisir.
A platform that only accepts PNG, an image you’ll edit several times, a screenshot to publish crisply: PNG keeps the image as it is, with no further compression.
How it works
- Drop your JPG images in the box, or click to choose them. You can add as many as you like.
- PNG is already selected, at full size. Adjust quality, size or file names if needed.
- Download each image or the whole batch. In Easy mode they are ready right away; in Manual mode, click “Convert” first.
Easy or manual
To convert quickly: drop your files and choose what they are for. Everything else is set for you.
To set everything yourself: format, quality, sizes, file names. Your choices are kept for next time.
Good to know
PNG is lossless: it freezes the JPG image without adding artefacts each time you save. It doesn’t bring back details JPG already removed, and doesn’t make the background transparent.
Frequently asked questions
Will PNG improve my JPG’s quality?
No: it keeps the image exactly, with no further loss, but can’t restore what JPG compression already removed.
Does the background become transparent?
No, a JPG has no transparency: the conversion doesn’t cut out the image.
Are my files uploaded to a server?
No. The conversion is done by your browser, on your computer: no file ever leaves your device. You can even go offline once the page has loaded.
Is it free?
Yes: no sign-up, no limit on the number of files and no watermark.