How to Convert PNG, JPG or GIF to WebP on Mac
ShowPro Team
Expert tool tutorials · showprosoftware.com
If you need a WebP copy of a PNG, JPEG, or GIF image on a Mac, ShowPro's Image to WebP tool performs the conversion in the browser.
Tool: https://showprosoftware.com/tools/image-to-webp
The current converter accepts one source image at a time, lets you choose WebP quality from 0 to 100, and downloads a .webp file at the source image's decoded dimensions.
Supported input formats
The current tool accepts:
The source file limit is 20 MB.
It does not currently accept HEIC, TIFF, BMP, or RAW files in this workflow.
For iPhone HEIC photos, use a dedicated HEIC converter first:
https://showprosoftware.com/tools/heic-to-jpg
For current HEIC browser support differences:
https://showprosoftware.com/blog/heic-compatibility-matrix-2026
Convert an image to WebP on Mac
The output keeps the browser-decoded width and height of the source. The current tool does not include resize controls.
If you need different dimensions, resize a copy first:
https://showprosoftware.com/tools/image-resizer
What the quality slider means
ShowPro passes the selected quality value to the browser's WebP canvas encoder.
A lower value generally asks the browser for stronger lossy compression and a smaller file. A higher value generally favors visual fidelity.
The exact output size and visual result depend on the source image and browser encoder.
A quality value of 100 should not be treated as a promise of mathematically lossless WebP output. The current tool uses the browser's normal canvas WebP export with a quality parameter.
Will WebP always be smaller?
No.
WebP often produces compact files, especially for photographic or web-oriented content, but no format conversion can guarantee a smaller result for every source image and quality setting.
Compare the downloaded file with the original before replacing production assets.
What happens to PNG transparency?
When the browser decodes transparent PNG pixels and exports WebP with alpha support, visible transparency can be preserved in the WebP result.
Inspect the final file when transparency is important.
What happens to animated GIFs?
The current converter does not preserve GIF animation.
The GIF is loaded through the browser's normal image element and the visible decoded frame is drawn to canvas. The result is a static WebP.
Use an animation-specific workflow when animation must be retained.
Metadata and color information
The converter draws visible decoded pixels onto a new canvas and exports a new WebP.
It does not provide controls to preserve or selectively strip EXIF, IPTC, or XMP metadata, and it should not be described as a metadata-preserving converter.
Keep the original image if source metadata, archival properties, or the exact original encoding matter.
No resizing during conversion
The current Image to WebP tool preserves the decoded image dimensions.
It does not provide width, height, crop, or aspect-ratio controls.
For resizing:
https://showprosoftware.com/tools/image-resizer
For fixed square thumbnails:
https://showprosoftware.com/tools/image-thumbnail-generator
Browser-local conversion
For this operation, the selected image is decoded, drawn to an HTML canvas, and exported as WebP in browser code.
The source image is not sent to a ShowPro image-conversion endpoint for this conversion.
Normal website analytics, advertising, billing, and other explicitly networked site functions are separate from this local file-processing step:
https://showprosoftware.com/privacy#local-processing
Safari and browser compatibility
The conversion requires a browser that can both decode the source image and export WebP from canvas.
Current mainstream Mac browsers generally support WebP, but browser capabilities can differ by version. If the tool reports that WebP export is unavailable, update the browser or try another current browser.
WebP to PNG is a different direction
If you already have a .webp file and need PNG, use:
https://showprosoftware.com/tools/webp-to-png
That is the reverse conversion.
FAQ
Can ShowPro convert HEIC to WebP in this tool?
No. The current Image to WebP tool accepts PNG, JPG/JPEG, and GIF. Use a HEIC-specific converter first.
Can I convert several images at once?
Not in the current Image to WebP tool. It processes one selected source image at a time.
Can I resize while converting?
No. The current converter keeps the decoded source dimensions.
Does it preserve animated GIFs?
No. The output is a static WebP.
Does it preserve EXIF/IPTC/XMP metadata?
The current canvas export does not provide a metadata-preservation option.
Is the source image uploaded for conversion?
The current image decoding and WebP export run in browser code rather than a ShowPro image-conversion endpoint.
Try Image to WebP Converter — Free
Browser-based. Private. No upload required. Works on iPhone, Mac, and Windows.
Open Image to WebP Converter Now →