Version: May 2025

Subtitle Translator

This is the official API to our Subtitle Translator.

You may need AI Credits to use this endpoint.

Quick Start

This guide shows a quick way to start a subtitle file translation processes using our API.

(i) A process will only be started if the associated account has enought AI Credits left.

Endpoint

This endpoint is used to initiate the translation process.

POST https://api.editingtools.io/v2/translate

Authentication

This API requires Basic Authentication. The "Authorization" header should be set with the Base64 encoded string of "apikey:YOUR_API_KEY".

Authorization: Basic <base64Encoded(apikey:YOUR_API_KEY)>

Headers

Content-Type: multipart/form-data

Specifies the format of the request body.

Authorization: Basic <base64EncodedString>

Authentication credential.

Request Body Parameters

Parameter Type Required Description
file File Yes The subtitle file to be translated. Accepted file formats:
  • .srt SubRip
  • .vtt Web Video Text
  • .sbv SubViewer
  • .csv (check presets)
  • .txt Avid DS SubCap format (only!)
sourceLang String Yes Define the source language. Possible values: AUTO (Detect language / Multiple languages used), BG, ZH, CS, DA, NL, EN, ET, FI, FR, DE, EL, HU, ID, IT, JA, KO, LV, LT, NB, PL, PT, RO, RU, SK, SV, ES, TR, UK.
targetLang String Yes Define the target language. Possible values: BG, ZH, CS, DA, NL, EN-GB, EN-US, EN, ET, FI, FR, DE, EL, HU, ID, IT, JA, KO, LV, LT, NB, PL, PT-PT, PT-BR, RO, RU, SK, SV, ES, TR, UK.
translationMode Int Yes Defines the translation mode.
  • 1 is recommended (Cross-Subtitle Translation)
  • 0 to translate each subtitle separately (for example for song lyrics)
formality String No Defines the formality of the translation. This setting only works for the following languages: Dutch, French, German, Italian, Japanese, Polish, Portuguese, Russian, Spanish
Possible values:
  • default
  • formal
  • informal
checkPrice Boolean No If this attribute is not added or set to false, it will execute the translation directly. If this value is set to true, it will only check the price in AI Credits to execute this task. The task will not be started until submitted again without this attribute.
notification Boolean No Whether to send an email notification upon completion. Default is false. Set to true to enable.

cURL Example 1 - check price for translation

Translations require AI Credits. This is an example to check the price of a request before starting it. This step is optional.

curl -X POST https://api.editingtools.io/v2/translate \
-u "apikey:YOUR_API_KEY" \ 
-F file=@/path/to/demo_subtitle_v01.srt \
-F sourceLang=FR \
-F targetLang=DE \
-F translationMode=1 \
-F checkPrice=true

cURL Example 2 - start a translation process

Here is an example of how to start the translation process. If all the attributes are correct and there are enough AI credits in the associated account, the process will begin.

curl -X POST https://api.editingtools.io/v2/translate \
-u "apikey:YOUR_API_KEY" \ 
-F file=@/path/to/demo_subtitle_v01.srt \
-F sourceLang=FR \
-F targetLang=DE \
-F translationMode=1 \
-F formality=default \
-F notification=true

Demo File

Demo subtitle file to test requests: demo_subtitle_v01.srt

Responses

Success (HTTP 200 OK / 201 Created)

If the request was successfull, the API will return a 200 OK status code with a JSON object. If a process was started successfull, the API will return a 201 Created status code with a JSON object. A successful started process will contain the processId in the response.

Field Type Description
code String HTTP status code.
status String A descriptive message about the process.
timestamp String Server time of the request (ISO 8601).
data Object An object containing details about the process.
data.requiredAiCredits String Returns the amount of AI Credits needed to start the process.
data.processId String A unique identifier for the process.
data.processDurationEstimate Int The estimated time until the process is finished given in seconds. The minimum value is 60 by default.

Response Example

{
    "code": "201",
    "status": "The translation process has been created successfully.",
    "data": {
        "processId": "ABCDEF1234",
        "processDurationEstimate": 60
    }
}
{
    "code": "200",
    "status": "The translation process will cost 2 AI Credits.",
    "data": {
        "requiredAiCredits": 2
    }
}

Error Responses

Error responses typically include an appropriate HTTP status code and a JSON body containing an error message.

{
    "code": "400",
    "status": "Failed to start translation."
}

Get Process Status

After the translation process is successfully started, this endpoint can be used to check it's status. Use the processId returned in the first request. Only processes started with the own account can be checked.

Endpoint

GET https://api.editingtools.io/v2/process/{processId}

Replace {processId} with the unique ID of the process.

Headers

Content-Type: multipart/form-data

Specifies the format of the request body.

Authorization: Basic <base64EncodedString>

Authentication credential.

Path Parameters

Parameter Type Description
processId String The unique identifier of the process.

cURL Request Example

curl -X GET https://api.editingtools.io/v2/process/{processId} \
-u "apikey:YOUR_API_KEY" 

Responses

Field Type Description
code String HTTP status code.
status String A descriptive message about the update.
timestamp String Server time of the request (ISO 8601).
data Object An object containing details about the process.
data.processId String Unique identifier of the process.
data.created String Timestamp of process creation (ISO 8601).
data.lastUpdate String Timestamp of last process update (ISO 8601).
data.status String Status string of process
data.label String Description of status.
data.fileName String Filename of generated file. (Only returned if a file was created)
data.fileUrl String Download path of file. (Only returned if a file was created)

Success (HTTP 200 OK)

If the process is successfully loaded, the API will return a 200 status code with a JSON object.

Example Response 1 - Process not completed

If the process is still running, a response like this could be given:

{
    "code": "202",
    "status": "Accepted",
    "timestamp": "2025-05-01T10:04:10Z",
    "data": {
        "created": "2025-05-01T10:00:00Z",
        "lastUpdate": "2025-05-01T10:01:00Z",
        "status": "in_progress",
        "label": "The process is still running."
    }
}

Example Response 2 - Process completed

The download path will be displayed once the process is complete.

{
    "code": "200",
    "status": "OK",
    "timestamp": "2025-05-01T10:00:00Z",
    "data": {
        "created": "2025-05-01T10:00:00Z",
        "lastUpdate": "2025-05-01T10:05:20Z",
        "status": "finished",
        "label": "The Process is finished."
        "fileName": "Trailer.zip",
        "fileUrl": "https://editingtools.io/download/demo/path/translations_editingtools.zip"
    }
}

The generated file can be downloaded using wget or curl, or it can be embedded directly into your app from fileUrl. Note that the generated file will only be hosted online for a limited time.

Error Responses

If the process failed, a response like this could be given:

{
    "code": "422",
    "status": "Unprocessable Entity",
    "timestamp": "2025-05-01T10:04:10Z",
    "data": {
        "created": "2025-05-01T10:00:00Z",
        "lastUpdate": "2025-05-01T10:05:20Z",
        "status": "failed",
        "label": "The Process failed."
    }
}

Download File

After the translation process is successfully completed, the file can be downloaded using the values returned in the process response under fileUrl and fileName.

cURL Request Example (macOS or Linux)

Example to download the file to the Desktop. Uses -o to specify the output file path.

curl -o ~/Desktop/{fileName} "{fileUrl}"
	                        
curl -o ~/Desktop/translations_editingtools.io.zip "https://editingtools.io/download/demo/path/translations_editingtools.zip"

cURL Request Example (Windows with PowerShell)

curl -o "$env:USERPROFILE\Desktop\{fileName}" "{fileUrl}"
	                        
curl -o "$env:USERPROFILE\Desktop\translations_editingtools.io.zip" "https://editingtools.io/download/demo/path/translations_editingtools.zip"

cURL Request Example (Windows Command Prompt with cURL installed)

curl -o "%USERPROFILE%\Desktop\{fileName}" "{fileUrl}"
	                        
curl -o "%USERPROFILE%\Desktop\translations_editingtools.io.zip" "https://editingtools.io/download/demo/path/translations_editingtools.zip"

Python3 Request Example

import os
import urllib.request

name = "translations_editingtools.io.zip"
url = "https://editingtools.io/download/demo/path/translations_editingtools.zip"

# Construct the path to the Desktop for example
local_path = os.path.join(os.path.expanduser("~"), "Desktop", name)

# Download the file
try:
    urllib.request.urlretrieve(url, local_path)
    print(f"File downloaded successfully and saved to: {local_path}")
except Exception as e:
    print(f"Failed to download file: {e}")

wget Request Example (macOS or Linux)

Example to download the file to the Desktop. Uses -O to specify the output file path.

wget -O ~/Desktop/{fileName} "{fileUrl}"

wget -O ~/Desktop/translations_editingtools.io.zip "https://editingtools.io/download/demo/path/translations_editingtools.zip"

wget Request Example (Windows with PowerShell)

wget -O "$env:USERPROFILE\Desktop\{fileName}" "{fileUrl}"

wget -O "$env:USERPROFILE\Desktop\translations_editingtools.io.zip" "https://editingtools.io/download/demo/path/translations_editingtools.zip"

wget Request Example (Windows Command Prompt with wget installed)

wget -O "%USERPROFILE%\Desktop\{fileName}" "{fileUrl}"

wget -O "%USERPROFILE%\Desktop\translations_editingtools.io.zip" "https://editingtools.io/download/demo/path/translations_editingtools.zip"

Endpoint URL

Endpoint URL for subtitle translation.

https://api.editingtools.io/v2/translate

Endpoint URL to check a process status.

https://api.editingtools.io/v2/process/{processId}

Authentication

This API requires Basic Authentication. The "Authorization" header should be set with the Base64 encoded string of "apikey:YOUR_API_KEY".

Authorization: Basic <base64Encoded(apikey:YOUR_API_KEY)>

Data Handling

Request parameters must be UTF-8 encoded. Results are returned as UTF-8-encoded JSON. By default, datasets will be inside the data tag.

Error Handling

This API service uses standard HTTP response codes to indicate whether a method was completed successfully. HTTP response codes in the 2XX range indicate success. Responses in the 4XX range indicate some sort of failure, while responses in the 5XX range indicate an internal system error that cannot be resolved by the user. The following error codes are used by the API:

Code Description
200 OK. The request was successful.
201 Created. The entity was created.
202 Accepted. The request was accepted.
400 Bad request. Please check error message.
401 Unauthorized: Username or Api Key is not valid.
402 Upgrade Required: This feature requires an active Pro subscription.
403 Forbidden: The request is understood, but it has been refused or access is not allowed.
404 Not found: The URI requested is invalid or the resource does not exist.
422 Unprocessable Entity. A process failed.
429 Too Many Requests. Try again in some seconds.
500 Internal Server Error. Something is broken.
502 Bad Gateway. API is down.
503 Service Unavailable. API is up but overloaded with requests.
504 Gateway Timeout: API is up but requests reached timout.

Rate Limits

To prevent abuse and spam, the API has limits at various levels. If you receive error code 429 (Too Many Requests), it means you have reached a rate limit.

If you receive a rate limit error, you should stop making requests temporarily. If the retry-after response header is present, you should not retry your request until after that many seconds has elapsed. To prevent rate-errors, we recommend to wait 300 ms to 800 ms between requests to the same endpoint.

Also there is a general limit to the api and all requests made:

Limit Requests
General limit per minute 50
General limit per hour 1000
Recommended wait time between requests > 200 ms
Recommended wait time between requests to one endpoint > 600 ms

The general limits per minute and per hour can be changed upon request.

Upload Limits

The maximum upload size for any single request — including file uploads — is 100 MB. This is a hard limit and applies regardless of your API plan or usage level.

If your request exceeds this size, it will be rejected before reaching our servers. To ensure successful uploads:

  • Make sure uploaded files are under 100 MB.
  • For larger media, consider splitting files before upload.
  • Requests close to the limit may still fail due to encoding or header overhead.

Timezone

This API endpoint returns the time as an ISO 8601 timestamp in the UTC time zone. These timestamps look like 2025-01-10T15:05:06Z.

Localization and Languages

This API supports multiple languages. For instance, it can display the text of a status message in a different language.

Accept-Language: LANGUAGE

Example

To set the preferred response language to Spanish, add this header:

Accept-Language: es

cURL Example

To apply the language in a cURL request, add the following header:

-H "Accept-Language: es"

Available Languages

The following list contains all the currently available languages. Note that setting a language header does not guarantee a translated response, as not all texts are translated. If no language is set or a translation is unavailable, the default response will be in English.

Code Language
en English
de German
fr French
es Spanish
ru Russian
it Italian
el Greek
pl Polish
pt Portuguese
lt Lithuanian
ko Korean
ja Japanese
zh Chinese
id Indonesian
tr Turkish
nl Dutch
ro Romanian
fi Finnish
cs Czech
hu Hungarian
ar Arabic
nb Norwegian Bokmål
sk Slovak
sl Slovenian
sv Swedish
lv Latvian
et Estonian
bg Bulgarian
uk Ukrainian
da Danish