Free Image Format Converter

Match the format to where the image is going

For images that will live on a website, WebP is the preselected output and a sound default: current browsers display it, it supports transparency, and at the default quality it is usually smaller than a JPG of the same picture. AVIF often goes smaller still, but not every browser can create it (see the last section).

When the file is going somewhere you do not control, such as an email attachment, an upload form, a print shop or an older photo viewer, choose JPG. Choose PNG when you plan to edit the image again, when it contains sharp text or interface elements, or when a transparent background has to survive.

ICO is only for icons. The converter writes six sizes into one file, 16, 32, 48, 64, 128 and 256 pixels square, so browsers and Windows can pick the one they need. Start from a square source of at least 256 pixels; a rectangular image is scaled to fit and centred, with the leftover space left transparent.

Lossy or lossless, and where the quality slider applies

JPG, WebP and AVIF are lossy formats: they discard detail the eye is unlikely to miss, and the quality slider decides how much. It runs from 10% to 100% and starts at 85%, and the same value is used whichever of the three you pick. PNG and ICO are saved losslessly, so the slider disappears when you select them.

For photos, 80–90% is usually hard to tell apart from the original at normal viewing size. Screenshots, diagrams and images with small text show artefacts sooner, so either raise the slider to 90% or more or use PNG.

Lossless does not mean the result is better than the source. A JPG converted to PNG keeps every compression artefact the JPG already had, in a much larger file. Likewise, converting one lossy file into another lossy format compresses it a second time, so keep your original and convert from it rather than chaining conversions.

What can get lost along the way

Transparency: JPG has no alpha channel, so the converter paints transparent areas white before encoding. PNG, WebP, AVIF and ICO keep transparent areas as they are.

Animation and metadata: each image is drawn onto a single canvas, so only one frame is used. An animated WebP or AVIF comes out as a still image, even if you pick WebP or AVIF as the target. Nothing from the original file's metadata is copied either: EXIF details such as camera model, capture date and GPS location, as well as any embedded colour profile, are left behind, so keep the original if you need them.

Colour and dimensions: the canvas works in the standard sRGB colour space, so a wide-gamut photo can look slightly less saturated after conversion. The pixel dimensions stay the same for every format except ICO. If you need a smaller image in pixels, use the image resizer before or after converting.

Why the new file is bigger or smaller

Each finished file shows the original size, the converted size and the change as a percentage, green when the file shrank and red when it grew. A red number is not an error. It usually means the target format suits the content less well than the source did: a camera photo turned into PNG can easily become several times larger, because lossless compression cannot do much with noisy, detailed pixels.

The opposite case happens too. A screenshot or flat graphic stored as PNG can get bigger as a high-quality JPG and pick up soft edges at the same time; WebP usually handles that kind of image better. If a result is heavier than you expected, try another format or lower the quality slider, then convert again, or finish with the image compressor.

Converting a batch and fixing common errors

You can select or drop many files at once, and the chosen format and quality apply to the whole list. Files are processed one after another. If you change the format or quality afterwards, press the convert button again before downloading: the whole list is re-encoded with the new settings, and downloads always use the extension that is currently selected.

Download All saves each converted image as a separate file, not as a ZIP archive. The new name is the part of the original name before the first dot plus the new extension, so "banner.final.png" becomes "banner.webp". Rename files that contain extra dots first, and watch for two sources that share a base name, such as photo.png and photo.webp.

If a file is rejected when you add it, it is not one of the accepted inputs: JPG, PNG, WebP, AVIF or ICO. iPhone HEIC photos go through the HEIC to JPG converter instead. An ICO that fails to open probably stores its images as BMP data, which is not supported; only ICO files with PNG-compressed images can be read, and the largest image inside is used. If your browser cannot produce AVIF or WebP, the converter shows an error rather than handing you a mislabelled file, so switch the format or the browser.