Convert WebP to PNG with an API

Convert WebP to PNG directly in the live demo below, or use the same Assembly Instructions in your application. 🤖/image/resize handles files as they are uploaded and can also process existing media libraries.

In this case "png" to convert to Portable Network Graphics images. We'll accept any image as input, no need to define that, but in this demo, we'll be uploading WebP Image Format images (WebP).

PNG preserves transparency and uses lossless compression, which makes it useful for editing and broad tool compatibility. The resulting PNG will often be larger than the WebP input.

For production workflows, set quality, preserve the original file when needed, and connect the conversion Step to an export Robot. See all supported image formats or combine conversion with other media-processing Robots.

Step 1:

Handle uploads

We can handle uploads of your users directly.Learn more

ravi-roshan-383162.webp

Image – 324 KB

4096 × 2301

":original": {
  "robot": "/upload/handle"
}

/upload/handle

This bot receives uploads that your users throw at you from browser or apps, or that you throw at us programmatically

Step 2:

Convert, resize, or watermark images

We can resize, crop, and (auto-)rotate images, or apply watermarks and other effects, and much more.Learn more

ravi-roshan-383162.png

Image – 3.0 MB

4096 × 2301

"converted": {
  "use": ":original",
  "robot": "/image/resize",
  "result": true,
  "format": "png"
}

/image/resize

This bot resizes, crops, changes colorization, rotation, and applies text and watermarks to images

Step 3:

Export files to Amazon S3

We export to the storage platform of your choice.Learn more

:original

https://demos.transloadit.com/da/25292c3c9746a68466aad1d643dc6d/ravi-roshan-383162.webp

converted

https://demos.transloadit.com/ce/a4c73833a941be917b2a6e0e17ecf8/ravi-roshan-383162.png

"exported": {
  "use": [
    "converted",
    ":original"
  ],
  "robot": "/s3/store",
  "credentials": "demo_s3_credentials",
  "url_prefix": "https://demos.transloadit.com/"
}

/s3/store

This bot exports encoding results to Amazon S3

Live Demo. See for yourself

Loading Uppy demo…

This live demo is powered by Uppy, our open source file uploader that you can also use without Transloadit, and tus, our open protocol for resumable file uploads that is making uploading more reliable across the world.

Build this in your own language

<!-- This pulls Uppy from our CDN -->
<!-- For smaller self-hosted bundles, install Uppy and plugins manually: -->
<!-- npm i --save @uppy/core @uppy/dashboard @uppy/remote-sources @uppy/transloadit ... -->
<link
  href="https://releases.transloadit.com/uppy/v3.10.0/uppy.min.css"
  rel="stylesheet"
/>
<button id="browse">Select Files</button>
<script type="module">
  import {
    Uppy,
    Dashboard,
    ImageEditor,
    RemoteSources,
    Transloadit,
  } from 'https://releases.transloadit.com/uppy/v3.10.0/uppy.min.mjs'
  const uppy = new Uppy()
    .use(Transloadit, {
      waitForEncoding: true,
      alwaysRunAssembly: true,
      assemblyOptions: {
        params: {
          // It's often better store encoding instructions in your account
          // and use a `template_id` instead of adding these steps inline
          steps: {
            ':original': {
              robot: '/upload/handle',
            },
            converted: {
              use: ':original',
              robot: '/image/resize',
              result: true,
              format: 'png',
            },
            exported: {
              use: ['converted', ':original'],
              robot: '/s3/store',
              credentials: 'demo_s3_credentials',
              url_prefix: 'https://demos.transloadit.com/',
            },
          },
        },
      },
    })
    .use(Dashboard, { trigger: '#browse' })
    .use(ImageEditor, { target: Dashboard })
    .use(RemoteSources, {
      companionUrl: 'https://api2.transloadit.com/companion',
    })
    .on('complete', ({ transloadit }) => {
      // Due to `waitForEncoding:true` this is fired after encoding is done.
      // Alternatively, set `waitForEncoding` to `false` and provide a `notify_url`
      console.log(transloadit) // Array of Assembly Statuses
      for (const assembly of transloadit) {
        console.log(assembly.results) // Array of all encoding results
      }
    })
    .on('error', (error) => {
      console.error(error)
    })
</script>

Read docs: Browsers

So many ways to integrate

Transloadit is a service for companies with developers. And there are many ways developers can put Transloadit to good use inside your company to automate media processing.