Change Image Extension

What Is an Image File Extension?

A file extension is the short ending after the dot in a file name, such as .jpg, .png, .webp, .gif or .bmp. It tells your computer, phone and browser which program should open the file and what kind of data to expect inside. When people ask how to change a file extension, they usually want a picture to work in a place that does not accept its current format.

Renaming vs Converting: Why Just Changing the Name Does Not Work

Many people try to change an image extension by renaming the file, for example from photo.webp to photo.jpg. This only changes the name. The data inside the file is still WebP, so many websites, apps and programs will refuse the file, show an error, or open it incorrectly.

To change the extension properly, the image has to be converted. A converter reads the picture, rewrites its data in the new format and saves it with the matching extension. This image extension changer does exactly that, so a file saved as .jpg is a real JPG and a file saved as .png is a real PNG.

How to Change an Image Extension Online

Changing the extension of an image with this tool takes only a few steps. You do not need to install anything or learn image editing.

1. Upload your images: Select JPG, PNG, WebP, GIF or BMP images from your device, or drag and drop them into the upload area. You can add up to 20 images at once.
2. Choose the new extension: Select JPG, PNG, WebP, GIF or BMP depending on where you want to use the image.
3. Select the quality: For JPG and WebP, choose Best, Balanced or Small file to control the balance between quality and file size.
4. Convert: Click Change extension and wait a moment while your images are converted.
5. Download: Save each image separately, or download all converted images together in a ZIP file.

Each image can be up to 10 MB. The tool converts the first frame of animated GIF images when you change them to a different format.

Popular Image Conversions

• WebP to JPG: Many downloaded and website images are saved as WebP. Convert WebP to JPG when an app, form or editor does not accept WebP.
• WebP to PNG: Use this when you need a lossless image that keeps transparency but must not be WebP.
• PNG to JPG: Make a smaller file for photos, uploads and email. Transparent areas become white.
• JPG to PNG: Get a lossless PNG file for editing, graphics or software that requires PNG.
• JPG to WebP and PNG to WebP: Create lighter images for faster websites.
• GIF to PNG and GIF to JPG: Turn a GIF into a still image.
• BMP to JPG and BMP to PNG: BMP files are very large. Convert BMP to JPG or PNG to save a lot of space.

JPG vs PNG vs WebP vs GIF vs BMP: Which Format Should You Choose?

Each image format has its own strengths. Picking the right one helps you get the best result for your use.

• JPG: Best for photos and everyday sharing. It creates small files using lossy compression and works almost everywhere, but it does not support transparency.
• PNG: Best for logos, graphics, screenshots and text. It is lossless and supports transparency, but files are usually larger than JPG.
• WebP: A modern format that is often smaller than JPG and PNG at similar quality and supports transparency. It is a good choice for websites.
• GIF: Limited to 256 colors and mostly used for simple graphics and short animations.
• BMP: An old, uncompressed format with very large files. It is only needed for older software that requires BMP.

What Happens to Transparency?

PNG and WebP support transparent backgrounds, so transparency is kept when you convert to these formats. JPG and BMP do not support transparency, so any transparent area is filled with a white background during conversion. If you need to keep a transparent background, choose PNG or WebP as the new extension.

Tips for Better Image Conversion

• Start with the best original: Converting an already low-quality image does not improve it. Always use the highest quality source you have.
• Avoid repeated conversions: Converting a JPG again and again can slowly reduce quality. Keep your original file safe.
• Choose the format for the job: Use JPG for photos, PNG for graphics and transparency, and WebP for fast websites.
• Check the result: Open the converted image and check it before using it for something important.

Free Image Format Converter Without Installing Software

This online image extension changer works in any modern web browser on desktop, tablet and mobile. You can convert images between JPG, PNG, WebP, GIF and BMP without installing a program, a plugin or an app. It is useful for students, designers, website owners, shop owners and anyone who needs an image in a different format quickly. The tool is free, needs no signup and adds no watermark.