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.
Add subtitles with styling to video
Advertisement videos with subtitles have higher engagement rates compared to those without. With browsers often starting video ads muted, captions are a great way to capture an audience's attention and get your message across.
However, since you often cannot rely on player compatibility, closed captions (that allow the viewer to select a language) are not an option. In that case, you might want to consider open captions, also known as "burned-in", "hard-coded", or "baked on" captions. Open captions means that subtitles are made up of pixels in the actual video itself. In this demo, we'll show you how to do it.
To make your content stand out more, we also offer the option to style the subtitles to be more personal to your brand. For the purposes of this demo, we go through three different subtitle styles.
Since both the video and the srt file will be coming from the same source (uploads) and are uploaded in one go, we'll use 🤖/file/filter to determine which file is which.
Step 1:
Handle uploads
We can handle uploads of your users directly.Learn more
application/x-subrip – 302 B
":original": {
"robot": "/upload/handle"
}Step 2:
Filter files
We let you reject, or direct files against different encoding Steps.Learn more
"video_filtered": {
"use": ":original",
"robot": "/file/filter",
"result": true,
"accepts": [
[
"${file.mime}",
"regex",
"video"
]
],
"error_on_decline": false
}Step 3:
Filter files
We let you reject, or direct files against different encoding Steps.Learn more
application/x-subrip – 302 B
"subtitle_filtered": {
"use": ":original",
"robot": "/file/filter",
"result": true,
"accepts": [
[
"${file.mime}",
"regex",
"application/x-subrip"
]
],
"error_on_decline": false
}Step 4:
Add subtitles to videos
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
"youtube": {
"use": {
"steps": [
{
"name": "video_filtered",
"as": "video"
},
{
"name": "subtitle_filtered",
"as": "subtitles"
}
]
},
"robot": "/video/subtitle",
"border_color": "40000000",
"border_style": "box",
"ffmpeg_stack": "v7",
"font": "Roboto",
"font_color": "FFFFFF",
"preset": "empty",
"subtitles_type": "burned"
}Step 5:
Add subtitles to videos
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
"netflix": {
"use": {
"steps": [
{
"name": "video_filtered",
"as": "video"
},
{
"name": "subtitle_filtered",
"as": "subtitles"
}
]
},
"robot": "/video/subtitle",
"border_color": "80000000",
"border_style": "shadow",
"ffmpeg_stack": "v7",
"font": "Consolas",
"font_color": "FFFFFF",
"preset": "empty",
"subtitles_type": "burned"
}Step 6:
Add subtitles to videos
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
"vintage": {
"use": {
"steps": [
{
"name": "video_filtered",
"as": "video"
},
{
"name": "subtitle_filtered",
"as": "subtitles"
}
]
},
"robot": "/video/subtitle",
"border_color": "00000000",
"border_style": "outline",
"ffmpeg_stack": "v7",
"font": "Arial",
"font_color": "03fcff",
"preset": "empty",
"subtitles_type": "burned"
}Step 7:
Export files to Amazon S3
We export to the storage platform of your choice.Learn more
:originalvideo_filteredsubtitle_filteredyoutubenetflixvintage"exported": {
"use": [
":original",
"video_filtered",
"subtitle_filtered",
"youtube",
"netflix",
"vintage"
],
"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',
},
video_filtered: {
use: ':original',
robot: '/file/filter',
result: true,
accepts: [['${file.mime}', 'regex', 'video']],
error_on_decline: false,
},
subtitle_filtered: {
use: ':original',
robot: '/file/filter',
result: true,
accepts: [['${file.mime}', 'regex', 'application/x-subrip']],
error_on_decline: false,
},
youtube: {
use: {
steps: [
{
name: 'video_filtered',
as: 'video',
},
, {
name: 'subtitle_filtered',
as: 'subtitles',
},
],
},
robot: '/video/subtitle',
border_color: '40000000',
border_style: 'box',
ffmpeg_stack: 'v7',
font: 'Roboto',
font_color: 'FFFFFF',
preset: 'empty',
subtitles_type: 'burned',
},
netflix: {
use: {
steps: [
{
name: 'video_filtered',
as: 'video',
},
, {
name: 'subtitle_filtered',
as: 'subtitles',
},
],
},
robot: '/video/subtitle',
border_color: '80000000',
border_style: 'shadow',
ffmpeg_stack: 'v7',
font: 'Consolas',
font_color: 'FFFFFF',
preset: 'empty',
subtitles_type: 'burned',
},
vintage: {
use: {
steps: [
{
name: 'video_filtered',
as: 'video',
},
, {
name: 'subtitle_filtered',
as: 'subtitles',
},
],
},
robot: '/video/subtitle',
border_color: '00000000',
border_style: 'outline',
ffmpeg_stack: 'v7',
font: 'Arial',
font_color: '03fcff',
preset: 'empty',
subtitles_type: 'burned',
},
exported: {
use: [':original', 'video_filtered', 'subtitle_filtered', 'youtube', 'netflix', 'vintage'],
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.
Video encoding
Document processing