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Image Format Converter

Batch-convert JPG, PNG, and WebP images in your browser. Review the output format and file-size change, then download individual images or a ZIP.

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Runs locally in your browser. Your input is not uploaded or stored. You can verify this in your browser’s network panel.

Processing limits

  • Accepted formats: jpeg, png, webp
  • Maximum file size: 25 MB
  • Maximum image size: 40,000,000 pixels
  • Maximum files: 20
  • Maximum total batch size: 100 MB

Canvas output may remove metadata such as EXIF orientation and camera information.

What does this tool solve?

Adjust multiple images to JPG, PNG, or WebP in the browser. Results show the before and after file sizes plus the signed size change; a smaller file is not guaranteed. JPEG and WebP quality can be tuned before downloading or passing the results to another image tool. To change image dimensions, use Image Resizer. To compare JPEG or PNG compression candidates, use Image Compressor.

Continue with Image Compressor, Image Resizer · Image formats and browser output behavior

What examples should you start with?

Convert a batch to WebP

Input
Text
Multiple JPG and PNG images · WebP output
Output
Text
Individual WebP results; download separately or as ZIP

Prepare a JPG export

Input
Text
PNG with transparency
Output
Text
JPEG · transparent pixels use a white background

How does it work?

The browser decodes each image, draws it to a Canvas, and exports the selected MIME type as a local Blob.

Changing the output format or quality automatically regenerates all current results without uploading the source files; More actions passes the current results to another image tool.

What are the edge cases and limits?

  • JPG, PNG, and WebP output is supported where the browser reports the requested MIME type.
  • JPG, PNG, and WebP inputs are limited to 25 MB and 40 megapixels per image, 20 files, and 100 MB per batch.
  • JPEG exports use a white background for transparent pixels and may remove EXIF metadata.
  • PNG output is lossless and does not use the quality slider.

Technical reference

Related tools

  • Image CompressorCompare JPEG and PNG compression candidates for multiple JPG, PNG, or WebP images. Review file sizes, RGB pixel error, and original-versus-output previews locally.
  • Image ResizerResize multiple JPG, PNG, or WebP images by dimensions or percentage. Check output dimensions, preserve proportions when needed, and download the results locally.
  • Image TransformerRotate and flip multiple images locally in your browser.
  • Image Color PaletteExtract five representative colors from images locally.

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