Media

Convert AVIF to WebP

Convert AVIF images to WebP format with advanced compression options and web optimization

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Upload each file first → returns { filePath }
curl -X POST 'https://api.elysiatools.com/upload/avif-to-webp' \
  -F 'file=@/path/to/imageFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/avif-to-webp' \
  -F 'imageFile=/path/to/file.ext' \
  -F 'quality=85' \
  -F 'lossless=false' \
  -F 'nearLossless=false' \
  -F 'effort=4' \
  -F 'smartSubsample=false' \
  -F 'alphaQuality=85' \
  -F 'keepMetadata=false' \
  -F 'resizeMethod=cover' \
  -F 'targetSize=e.g., 800:600 or just 800'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/avif-to-webp

Parameters

Name	Type	Required	Description
imageFile	fileupload required	Yes	—
quality	range	No	WebP quality level (0-100). Higher values = better quality, larger file size.
lossless	checkbox	No	Compress without any quality loss (overrides quality setting)
nearLossless	checkbox	No	Almost perfect quality with good compression (min quality: 85)
effort	range	No	Higher values = better compression but slower processing
smartSubsample	checkbox	No	Enable smart chroma subsampling for potentially better quality
alphaQuality	range	No	Quality setting for alpha/transparency channel when present
keepMetadata	checkbox	No	Preserve original image metadata (EXIF, IPTC, XMP)
resizeMethod	select	No	—
targetSize	text	No	Target dimensions (width:height or just width). Height calculated if omitted.

File-type parameters must be uploaded first via POST /upload/avif-to-webp, then the returned filePath is passed to the corresponding file field.

Response format

File result

JSON

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-avif-to-webp": {
      "name": "avif-to-webp",
      "description": "Convert AVIF images to WebP format with advanced compression options and web optimization",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=avif-to-webp",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "avif-to-webp",
    "arguments": {
  "imageFile": "https://example.com/file.ext",
  "quality": 85,
  "lossless": false,
  "nearLossless": false,
  "effort": 4,
  "smartSubsample": false,
  "alphaQuality": 85,
  "keepMetadata": false,
  "resizeMethod": "cover",
  "targetSize": "e.g., 800:600 or just 800"
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

File parameters accept a public file URL only (https://…). Local paths, data: URIs, and Base64 strings are not supported.

Questions or issues? Contact [email protected]