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WebP Converter

In-browser only WebAssembly (WASM) Batch: up to 50 files
↵ convert⌘S download

Your converted file will appear here.

Runs entirely in your browser — your images are never uploaded.
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Overview

Convert images to and from WebP in your browser

Convert images to and from WebP in your browser. Quality control, resize, batch processing — your images never leave your device.

  • Convert JPG, PNG, GIF, BMP, AVIF ↔ WebP
  • Lossy and lossless WebP encoding
  • Batch up to 50 images with ZIP download
  • Resize with aspect-ratio lock
  • Before/after comparison panel
  • Runs entirely in your browser — nothing uploaded
  • Images are decoded and converted in your browser
  • Nothing is uploaded to a server
  • Conversion runs via the Canvas API and on-device WebAssembly
  • Files never leave your device
  • No copies are kept after you close the tab
  • Shrink JPG or PNG photos to smaller WebP for faster pages
  • Convert WebP back to JPG or PNG for apps that reject WebP
  • Batch-convert a folder of images to WebP for the web
  • Flatten a transparent image onto a background when exporting JPEG
  • Resize and re-encode in one step before publishing

Step by step

How to convert images to WebP

  1. 1
    Add your image

    Drag a file onto the drop zone, browse to select one, paste from clipboard, or enter an image URL. Supported formats: JPG, PNG, GIF, WebP, BMP, AVIF.

  2. 2
    Choose the output format

    Select your target format. WebP is chosen automatically when you add a non-WebP image. For WebP sources, JPEG is pre-selected.

  3. 3
    Adjust quality and options

    Use a preset (Web optimised, High quality, Lossless) or drag the quality slider. Toggle lossless mode for pixel-perfect output. Resize and set a background color for transparent images.

  4. 4
    Convert and download

    Click Convert image. The before/after comparison panel shows the size difference. Download the result with one click.

  5. 5
    Batch convert multiple files

    Switch to the Batch tab, drop up to 50 images, set shared options, and convert all at once. Download individually or as a ZIP archive.

Get the best result

Tips for WebP conversion

  • Use quality 75–85 for most web images

    WebP at quality 80 typically looks identical to JPEG at quality 90 while being 25–35% smaller. Quality above 90 produces diminishing returns.

  • Choose lossless for logos and flat graphics

    Photographs compress well with lossy encoding. Logos, icons, and text-heavy screenshots retain sharpness better with lossless or PNG.

  • Set a background color before converting to JPEG

    If your source image has transparent areas and you convert to JPEG, use the background-color picker to choose a fill color. The default is white.

  • Resize before uploading to your CMS

    Use the resize panel to match the exact display dimensions. Serving a 4000 × 3000 px image for a 800 × 600 px slot wastes bandwidth regardless of format.

Frequently asked questions

What is the WebP format?
WebP is a modern image format developed by Google that provides superior compression for images on the web. It typically produces smaller files than JPEG and PNG at comparable visual quality, and supports both lossy and lossless compression as well as transparency and animation.
Can I convert WebP to JPEG or PNG?
Yes. Add your WebP file and choose JPEG or PNG as the output format. JPEG is selected automatically when you load a WebP image. Note that converting to JPEG removes any transparency — use the background-color picker to choose the fill color.
Will my image quality be affected?
Lossy conversion (the default) reduces file size by discarding some detail. Use the quality slider to control the trade-off. The default value of 80 is a good balance. For pixel-perfect results, choose Lossless or PNG output.
Does this tool upload my images anywhere?
No. All processing happens in your browser using the Canvas API and WebAssembly. Your images are never sent to any server.
What is the maximum file size?
The tool accepts files up to 200 MB. Very large files may be slow to process on low-powered devices because conversion runs on your CPU.
Can I convert multiple images at once?
Yes. Use the Batch tab to add up to 50 images. Set the output format, quality, and optional resize once, then convert all files. Download results individually or as a single ZIP archive.
Which browsers support WebP?
All major modern browsers — Chrome, Edge, Firefox, Safari 14+, and their mobile counterparts — support WebP natively. If you need compatibility with older software, convert the WebP back to JPEG or PNG.