Convert image formats online in bulk

Choosing the right image format for your needs

Image formats differ in how they store pixel data, whether they support transparency, and how much they compress. Choosing the right format affects file size, visual quality, browser compatibility, and whether your image can have transparent areas. Understanding these trade-offs helps you pick the optimal format for each use case.

JPG (JPEG) uses lossy compression optimized for photographs. It produces small files with excellent visual quality for photos but does not support transparency and introduces artifacts on sharp edges, text, and flat-color graphics. JPG is ideal for photographs, hero images, and any content where small file size matters more than pixel-perfect accuracy.

PNG uses lossless compression and supports full alpha transparency. It produces larger files than JPG for photographs but is perfect for logos, icons, screenshots, and any image with text, sharp edges, or transparent areas. PNG guarantees that every pixel is preserved exactly as the original.

WEBP is a modern format that supports both lossy and lossless compression plus transparency. It typically produces files 25-35% smaller than equivalent JPG or PNG files with comparable visual quality. WEBP is supported by all modern browsers and is the recommended format for web delivery when you need the best balance of quality and file size.

Common use cases

• Optimizing website images: Convert PNG screenshots and graphics to WEBP for 30-50% smaller files while maintaining transparency support, improving page load speed and Core Web Vitals.
• Preparing images for email: Convert WEBP or PNG files to JPG for maximum email client compatibility, since some older email clients do not render modern formats.
• Creating transparent assets: Convert JPG product photos (after background removal) to PNG or WEBP to preserve the transparent background for use in designs and composites.
• Archiving in lossless format: Convert lossy JPG files to PNG for archival purposes when you need to prevent further quality degradation from repeated edits and saves.

Technical details

Lossy vs lossless

JPG and WEBP-lossy discard some data to achieve smaller files. PNG and WEBP-lossless preserve every pixel exactly. The quality slider controls how much data lossy formats discard.

Transparency support

PNG and WEBP support full 8-bit alpha channels (256 levels of transparency per pixel). JPG has no transparency — transparent areas are flattened to white during conversion.

Color depth

All formats support 24-bit color (16.7 million colors). PNG additionally supports 8-bit indexed color (256 colors) for smaller file sizes on simple graphics.

Browser compatibility

JPG and PNG work everywhere. WEBP works in all modern browsers (Chrome, Firefox, Safari 14+, Edge). GIF is universally supported but limited to 256 colors.

How to convert image formats online

Pick a target format and convert one or many images at once.

1. Drop images into the converter or pick them from your device.
2. Choose the output format such as PNG, JPG, or WEBP.
3. Set quality if you are converting to JPG or WEBP.
4. Download the converted file or a ZIP for the whole batch.

Frequently asked questions