What is a JPEG file?

The JPEG format in brief: what it is, what it is used for, and how to convert it.

JPEG: conversion steps

  1. Upload your JPEG file to start.
  2. Convert JPEG to AVIF.
  3. Download the JPEG file.

About JPEG files

the universal lossy photo format

JPEG is the standard lossy image format, named after the Joint Photographic Experts Group that published it in 1992. It shrinks photos to a fraction of their raw size by discarding fine detail.

Photos from cameras and phones, images on the web and email attachments; every device and app opens it.

JPEG: what conversion changes

Converting JPEG re-encodes pixels.

JPEG: settings to change

Before you convert JPEG files, you can adjust: Width, Height, Scale fit, Crop position, Never enlarge, Quality, Lossless, Progressive, Remove metadata, Auto-orient from EXIF, Rotate, and Background.

Limits of the JPEG format

JPEG has no transparency, stores 8 bits per colour channel, and loses a little more quality every time it is saved again.

Common questions about JPEG

Why does my photo get worse every time I edit and save it as JPG? Each save re-compresses the image and piles new artifacts on the old ones — working from a lossless original and exporting once to JPG avoids the buildup.

Why convert photos to JPG? It is the one image format every website, app and photo service accepts, and at high quality settings the loss is invisible.

Convert JPEG files

Guides and tools for JPEG