We are a Swiss Army knife for your files
Transloadit is a service for companies with developers. We handle their file uploads and media processing. This means that they can save on development time and the heavy machinery that is required to handle big volumes in an automated way.
We pioneered with this concept in 2009 and have made our customers happy ever since. We are still actively improving our service in 2026, as well as our open source projects uppy.io and tus.io, which are changing how the world does file uploading.
Generate a slideshow from a series of images
Slideshows are a great way for you to show off your images with a personal flare. Letting your users show holidays, special events or pictures of the family has never been so easy and customizable using the services we offer. In this demo, we use a combination of Robots to create a slideshow from a series of images, then apply a backing audio track.
When using 🤖/video/encode to generate a slideshow, the images used
are merged in the order of their filenames. You could, for example, call them 1.jpg, 2.jpg, etc.
and they will be used in the correct order.
From here we will upload a backing track for the slideshow, which in this case is provided by importing an audio track from a URL, but could also be uploaded by the user.
With duration: null, the slideshow will repeat the photos until the song is finished. You could
also set duration: 9, so that it stops after the 3 photos display for 3 seconds each.
You can read more about advanced use cases in the Assembly Instructions docs</a
.
Step 1:
Handle uploads
We can handle uploads of your users directly.Learn more



":original": {
"robot": "/upload/handle"
}Step 2:
Import files from web servers
We are happy to import from whatever storage solution suits you best.Learn more
"imported_audio": {
"robot": "/http/import",
"result": true,
"url": "https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3"
}Step 3:
Convert, resize, or watermark images
We can resize, crop, and (auto-)rotate images, or apply watermarks and other effects, and much more.Learn more



"resized": {
"use": ":original",
"robot": "/image/resize",
"result": true,
"height": 768,
"resize_strategy": "fillcrop",
"width": 1024
}Step 4:
Merge video, audio, images into one video
We offer a variety of video encoding features like optimizing for different devices, merging, injecting ads, changing audio tracks, or adding company logos.Learn more
"merged": {
"use": {
"steps": [
{
"name": "imported_audio",
"as": "audio"
},
{
"name": "resized",
"as": "image"
}
],
"bundle_steps": true
},
"robot": "/video/merge",
"result": true,
"ffmpeg_stack": "v7",
"framerate": "1/3",
"preset": "ipad-high",
"resize_strategy": "fillcrop"
}Step 5:
Export files to Amazon S3
We export to the storage platform of your choice.Learn more
:originalimported_audioresizedmerged"exported": {
"use": [
"imported_audio",
"resized",
"merged",
":original"
],
"robot": "/s3/store",
"credentials": "demo_s3_credentials",
"url_prefix": "https://demos.transloadit.com/"
}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',
},
imported_audio: {
robot: '/http/import',
result: true,
url: 'https://demos.transloadit.com/inputs/joakim_karud-rock_angel.mp3',
},
resized: {
use: ':original',
robot: '/image/resize',
result: true,
height: 768,
resize_strategy: 'fillcrop',
width: 1024,
},
merged: {
use: {
steps: [
{
name: 'imported_audio',
as: 'audio',
},
, {
name: 'resized',
as: 'image',
},
],
bundle_steps: true,
},
robot: '/video/merge',
result: true,
ffmpeg_stack: 'v7',
framerate: '1/3',
preset: 'ipad-high',
resize_strategy: 'fillcrop',
},
exported: {
use: ['imported_audio', 'resized', 'merged', ':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>
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.
Bulk imports
Add one of our import Robots to acquire and transcode massive media libraries.
Handling uploads
We are the experts at reliably handling uploads. We wrote the protocol for it.
Front-end integration
We integrate with web browsers via our next-gen file uploader Uppy and SDKs for Android and iOS.
Back-end integration
Send us batch jobs in any server language using one of our SDKs or directly interfacing with our REST API.
Pingbacks
Configure a notify_url to let your server receive transcoding results JSON in the transloadit POST field.
On-demand
Use our Smart CDN to adapt files on-demand and stream them directly to your users.
