Choose an image format without losing what matters

Format comparison for everyday use

JPG: broad compatibility for photographs

JPG is a dependable delivery format for ordinary photos because most forms, documents, browsers, and devices accept it. The compression is lossy, which means each export makes a quality decision. Use the best available original, choose one reasonable quality level, and avoid repeatedly opening and re-saving the new JPG.

JPG does not store transparent pixels. When a transparent logo is converted to JPG, the empty area must be filled with a color. RAON Tools uses a solid background for JPG output, so check the result against the page or document where it will appear.

PNG: sharp edges and transparency

PNG is lossless for ordinary still images and is well suited to screenshots, interface elements, diagrams, and logos with transparency. It preserves crisp edges and does not create the same block or ringing artifacts around text that heavy JPG compression can produce.

A detailed camera photo contains many colors and subtle variations, so PNG often stores it inefficiently. Converting every photo to PNG may increase storage and upload time without adding useful detail. PNG is a good choice because of the image content, not because “lossless” automatically makes the source better.

WebP: efficient when the destination supports it

WebP can produce smaller web images and can support transparency. It is useful for publishing systems and browsers that accept it. Compatibility is the deciding factor: a web page may accept WebP while an older document editor, print service, or upload form does not. Convert WebP to JPG for a photograph when broad compatibility is more important than preserving transparency.

HEIC to JPG: make a compatibility copy, keep the original

HEIC and HEIF are common in modern phone-photo workflows and can store images efficiently. A website or Windows application may still reject the file. In that case, export JPG for the destination while retaining the HEIC original.

A browser conversion focuses on the visible still image. Orientation, capture time, location, depth information, edits, burst relationships, Live Photo components, and other metadata may not all survive. If those details matter, use the phone's photo export or original sharing workflow and verify the metadata separately.

Transparency is the easiest detail to lose

Before converting PNG or WebP to JPG, view the image against both a light and dark background. A logo that looks fine on white may contain transparent edges intended for another color. After JPG conversion, those pixels become part of a fixed background. Keep the transparent source for future design work and use the JPG only where transparency is not needed.

Format conversion does not always reduce size

PNG to JPG often reduces a photographic file, but JPG to PNG usually makes it larger without restoring lost detail. HEIC to JPG may also create a larger file because the formats use different compression. If the only problem is a byte limit and the current format is accepted, compress or resize rather than changing format blindly.