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Image Format Converter

Convert between JPG, PNG and WebP.

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REAL-WORLD EXAMPLE

Convert JPG photos to WebP

Try: Select one or more JPG or PNG images, choose WebP as Export format, then Process.

Expected behavior: The results list shows each converted file. Download one file or the full ZIP.

Transparency becomes white if JPEG is selected.

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About the Image Format Converter

Convert common image formats between JPEG, PNG and WebP, with quality and dimension controls.

Formula or method

The browser decodes the source picture and exports a selected image MIME format using canvas encoding.

Worked example

Convert a PNG image to WebP for a smaller web asset, or convert WebP to JPEG for wider compatibility.

How to use the tool

  1. Choose one or more JPEG, PNG or WebP source images from your device.
  2. Select the target file format and quality for JPEG/WebP.
  3. Process the images, preview output quality, and download each file or the full ZIP.

When this tool is useful

Convert images between JPEG, PNG and WebP for compatibility or smaller file size.

What to check before relying on the result

JPEG replaces transparent pixels with white. The converter does not retain animated frames or original EXIF metadata.

Assumptions and limitations

Transparency is flattened to white for JPEG. EXIF metadata is removed and SVG, HEIC and GIF are not supported in this first version.

Frequently asked questions

Does changing extension convert the image?

No. This tool re-encodes the actual pixel data to your chosen output format.

What is the best format for a transparent logo?

Use PNG or WebP when transparency matters; JPEG does not support an alpha channel.

Continue with a related workflow

Privacy and support

Your inputs are processed locally in your browser. ToolMosaic does not upload or store the values you enter in this tool. Our tools are free, and we appreciate your support.