Convert Image Format FREE | JPG JPEG PNG WebP Converter Online

Convert any image between JPG, JPEG, PNG, and WebP formats instantly. Upload multiple files and see a thumbnail preview of each one. Convert them all at once and each file downloads with the correct filename and extension. Entirely client-side, nothing is uploaded.

Private - No Upload

Preview Each Image

Batch Convert

Free Forever

Image Format Converter

Drop images here or click to browse

JPG, JPEG, PNG, WebP and multiple files supported

Frequently Asked Questions

JPG and JPEG are exactly the same format. JPEG stands for Joint Photographic Experts Group. The extension was shortened to JPG on Windows because early versions of Windows only allowed three-letter file extensions. Both .jpg and .jpeg files contain identical data and open in all the same applications. This tool lets you choose which extension you want in the output filename.

Converting from JPG to PNG re-encodes a lossy image as lossless. The PNG will be exactly as sharp as the JPG input, but files are typically larger. Converting PNG to JPG applies compression, so fine detail on graphics with sharp edges may soften slightly. Converting to WebP at 0.92 quality is virtually indistinguishable from the original for photos. PNG output preserves transparency; JPG fills transparent areas with white.

Yes. PNG and WebP both support transparent backgrounds (alpha channel). If your input PNG has transparent pixels they are preserved in PNG or WebP output. JPEG and JPG do not support transparency, so transparent areas are filled with white when converting to those formats.

The converted file uses the original filename with the old extension replaced by the new one. For example, photo.png converted to JPG downloads as photo.jpg. The original name is preserved exactly so your files stay organised and easy to identify.

Both. Use the Download button on each individual file card to convert and download just that one image. Use the Convert and Download All button to process every file in the list at once. Individual downloads are useful when you only want specific files from a larger batch.

About One Doc Studio

One Doc provides Forever Free browser-based tools. Nothing is uploaded. Your files never leave your device.

Free Image Format Converter Online - Convert Between JPG, JPEG, PNG and WebP Instantly

Image format compatibility problems appear constantly in digital workflows. A client sends PNG files but a system accepts only JPG. A web developer needs WebP for optimised page loading but the design team works in PNG. An e-commerce platform requires JPG product images but the photographer delivers WebP. The Image Format Converter on OneDocPDF handles all four major web image format conversions with batch support, preview thumbnails, and correct filename handling.

JPG and JPEG are the same format with two different extensions. This converter lets you choose which extension you want, so if a system requires .jpeg specifically, you can output .jpeg rather than .jpg. PNG is the correct choice for logos, icons, screenshots, and any content requiring lossless quality. WebP is optimal for web publishing, offering smaller file sizes than both JPG and PNG while supporting transparency.

After converting, explore related tools: Compress Image for quality-controlled size reduction, Resize Image for dimension adjustment, Watermark Image for copyright protection, and JPG to PDF for document workflows. Browse the complete image tools library and PDF tool suite on OneDocPDF.