Which format should you choose?
JPG is the format almost everything understands: email, forms, old photo viewers, printers and office software. It's ideal for photos, but it has no transparency, and it's the safe choice when you're not sure what the other side can open.
PNG keeps every pixel exactly as it is and supports transparency. It's the right format for screenshots, logos, diagrams and images with text, although photos saved as PNG are usually heavy.
WEBP and AVIF are modern formats used widely on the web. Both handle photos and transparency and tend to produce lighter files, AVIF usually the lightest, which makes them a good fit for websites and online stores. Some older programs still can't open them, which is exactly why people so often need to convert them back to JPG.
The other outputs cover specific jobs. ICO creates icons with several sizes from 16 to 256 px, square and transparent, for favicons and desktop shortcuts. TIFF is lossless and uncompressed, so it's heavy but welcome at print shops. BMP is a plain 24-bit image for older software, with transparent areas turned white. GIF keeps up to 256 colors and comes out as a still image.
What happens to transparency and quality
JPG can't store transparent areas. When you convert a PNG or WEBP with a transparent background to JPG, those areas are filled with white, so a logo ends up on a clean white background rather than a black one.
For JPG, WEBP and AVIF you can adjust the quality: higher quality means more detail and a bigger file, lower quality means a lighter file. PNG output is lossless, so there's no quality setting. GIF files are converted using their first frame, SVG files are drawn at 2000 px on the longer side, and AVIF encoding is slow, so on a phone it can take a few seconds per image.
Special formats: HEIC, RAW, PSD, AI and more
iPhone HEIC photos open in Safari, and in Chrome when the device has an HEVC decoder, as on Macs, Android phones and many Windows PCs. JPEG XL opens natively in Safari 17 and later; other browsers download a decoder only when it's needed. If your browser can't read a file, the site tells you instead of failing silently.
Camera RAW files such as CR2, NEF, ARW and DNG are converted from the JPEG preview the camera stores inside the file. The RAW data itself isn't developed, and the preview is full size on many cameras but smaller on others. Photoshop PSD files need the combined image saved with “Maximize Compatibility”, and Illustrator AI files need “Create PDF Compatible File”, which is the default; each artboard comes out as an image at 200 dpi. JPEG, JPG and JFIF are the same format, so converting between them copies the file without recompressing it.
Nothing leaves your device
The conversion runs entirely in your browser. Your images are never uploaded or stored, so you can convert personal photos, ID pictures or work screenshots without worrying about where they end up. There's no sign-up and no usage limit: ConvertirDocs is 100% free, and you can convert a whole batch in one go.
Need a PDF instead of an image? Send the result to “JPG to PDF” without selecting it again.